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Cybertelecom
Federal Internet Law & Policy
An Educational Project
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Wireless: Unlicensed Proceedings |
ET Docket No. 03-201
Released Sept 17, 2003 |
Comments Due 30 Days after pub in Fed Reg. Replies Due 45 days after pub in Fed Reg |
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| Modification of Parts 2 and 15 of the Commission's Rules for unlicensed devices and equipment approval. |
1. By this action, we propose to review and update certain rule sections contained in Parts 2 and 15 of our rules. We take this action as part of our ongoing process of updating our rules to promote more efficient sharing of spectrum used by unlicensed devices and remove unnecessary regulations that inhibit such sharing. Specifically, in this Notice, we propose to: 1) modify the rules to permit the use of advanced antenna technologies with spread spectrum devices in the 2.4 GHz band; 2) modify the replacement antenna restriction for Part 15 devices; 3) modify the equipment authorization procedures to provide more flexibility to configure transmission systems without the need to obtain separate authorization for every combination of system components; 4) harmonize the measurement procedures for digital modulation systems authorized pursuant to Section 15.247 of the rules with those for similar U-NII devices authorized under Sections 15.401- 15.407 of the rules; 5) modify the channel spacing requirements for frequency hopping spread spectrum devices in the 2.4 GHz band in order to remove barriers to the introduction of new technology that uses wider bandwidths; 6) clarify the equipment authorization requirements for modular transmitters; and 7) make other changes to update or correct Parts 2 and 15 of our rules. In addition, we invite comment on ways the Commission might improve spectrum sharing among unlicensed devices.
2. These proposals, if adopted, should prove beneficial to manufacturers and users of unlicensed technology, including those who provide services to rural communities. Specifically, we note that a growing number of service providers are using unlicensed devices within wireless networks to serve the varied needs of industry, government, and general consumers alike. One of the more interesting developments is the emergence of wireless Internet service providers or "WISPs." Using unlicensed devices, WISPs around the country are providing an alternative high-speed connection in areas where cable or DSL services have been slow to arrive. We believe that the increased flexibility proposed herein will help to foster a viable last mile solution for delivering Internet services, other data applications, or even video and voice services to underserved, rural, or isolated communities.
902 - 928 MHz LMS and Part 15 Org - UltraWide Band
- Progeny Petition for Rulemaking RM 10403 asking for expanded rights that could cause harmful interference to LE devices. Ask FCC to eliminate Safe Harbor that defines when LE devices do not cause harmful interference. Opposed by LEA and WaveRider.
| Proceeding Initiated May 10, 2000 |
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Ex Parte |
Comment
Appeals |
IN THE MATTER OF REVISION OF PART 15 OF THE COMMISSION'S RULES REGARDING ULTRA-WIDEBAND TRANSMISSION SYSTEMS. Dkt No.: ET-98-153. |
"1. By this Notice of Proposed Rule Making ("Notice"), we propose to amend Part 15 of the Commission's rules to pave the way for new types of products incorporating ultra-wideband ("UWB") technology. UWB devices may have the capability to provide for significant benefits for public safety, businesses and consumers. While comprehensive tests have not been completed, UWB devices appear to be able to operate on spectrum already occupied by existing radio services without causing interference, which would permit scarce spectrum resources to be used more efficiently. We are moving forward with this Notice to begin the process of identifying potential rule changes and alternatives necessary for the deployment of UWB technology. The proposals in this Notice are designed to ensure that existing and planned radio services, particularly safety services, are adequately protected. UWB technology is relatively new. Further testing and analysis is needed before the risks of interference are completely understood. Such testing is already being planned by a number of organizations. We will provide ample opportunity to complete these tests and ensure that analyses of the test results are submitted in the record for public comment before adopting any final rules in this proceeding. We invite broad comment on this Notice so that the Commission may ultimately provide for the introduction of this new and exciting technology."
Notice of Proposed Rulemaking Action of the Commission Adopted: May 10, 2000. by NPRM. (FCC No. 00-163). OET
Comments Due: 90 days from publication in Federal Register, Reply Comments Due: 120 days from publication in Federal Register.
Media Advisory: Gregory L. Rohde, assistant secretary of commerce for communications and information and administrator of the National Telecommunications and Information Administration (NTIA), will be available to the press on Thursday, August 10, to discuss NTIA's proposed measurement plan to assess the potential of interference issues from ultrawideband systems to the Global Positioning System (GPS). (August 9, 2000)
Commission Denies Petition for Reconsideration of Waivers to Part 15 to Allow UWB Operations. Order, FCC No.00-029, Released July 14, 2000.
Remarks of Commissioner Susan Ness Before the 1999 International Ultra-Wideband Conference Washington, D.C. September 29, 1999 (As Prepared for Delivery) "Meeting the Challenge of Innovation at Internet Speed"
Comments Filed in this proceeding can be viewed at the FCC's Electronic Comment Filing System (you will need the docket number)
- 09/03/2004. OFFICE OF ENGINEERING AND TECHNOLOGY DECLARES MBOA-SIG REQUEST FOR A WAIVER OF PART 15 FOR AN ULTRA-WIDEBAND SYSTEM TO BE A "PERMIT-BUT-DISCLOSE" PROCEEDING FOR EX PARTE PURPOSES. (Dkt No 04-352) Erratum to Public Notice DA04-2793, released on August 30, 2004. Comments Due: 09/29/2004. Reply Comments Due: 10/14/2004. OET. Contact: John Reed at (202) 418-2455, FCC 9/7/2004
- UNLICENSED OPERATION IN THE TV BROADCAST BANDS/ADDITIONAL SPECTRUM FOR UNLICENSED DEVICES BELOW 900 MHZ IN THE 3 GHZ BAND. Granted a 90 day extension of the comment and reply comment deadlines. By Order Granting Extension of Time. (Dkt No. 02-380 , 04-186). Action by: Chief, Office of Engineering and Technology. Comments Due: 11/30/2004. Reply Comments Due: 12/30/2004. Adopted: 08/25/2004 by ORDER. (DA No. 04-2655). OET, FCC 9/7/2004
- FCC Changes Rules to Promote Use of Unlicensed Broadband Service in Rural Areas., FCC 7/13/2004
- Unlicensed Operation of the 3650-3700 Band, Fed Reg 5/18/2004
- UNLICENSED OPERATION IN THE BAND 3650-3700 MHZ ET AL. Proposed amending rules to maximize the efficient use of the 3650-3700 band and foster the introduction of new and advanced services. (Dkt No. 98-237 , 02-380). Action by: the Commission. Adopted: 04/15/2004 by NPRM. (FCC No. 04-100). OET, FCC 4/23/2004
- Released: 06/24/2004. COMMISSION STAFF CLARIFIES FCC'S ROLE REGARDING RADIO INTERFERENCE MATTERS AND ITS RULES GOVERNING CUSTOMER ANTENNAS AND OTHER UNLICENSED EQUIPMENT. (DA No. 04-1844). OET. Contact: James Miller at (202) 418-7351, email: James.Miller@fcc.gov, FCC 6/29/2004
- NTIA has invited interested parties to file comments on an expansion of the 3650-3700 MHz band to unlicensed devices for wireless broadband applications such as WiFi while protecting federal operations in those bands from interference or other adverse effects. Comments are due on or before February 27, 2004., NTIA 2/12/2004
- MODIFICATION OF PARTS 2 AND 15 OF THE COMMISSION'S RULES FOR UNLICENSED DEVICES AND EQUIPMENT APPROVAL. Issued Erratum correcting, FCC 03-223, released September 17, 2003. (Dkt No. 03-201). Action by: Chief, Office of Engineering and Technology. Adopted: 11/19/2003 by ERRATUM. (DA No. 03-3729). OET, FCC 11/21/2003
- REVISION OF PARTS 2 AND 15 OF THE COMMISSION'S RULES TO PERMIT UNLICENSED NATIONAL INFORMATION INFRASTRUCTURE (U-NII) DEVICES IN THE 5 GHZ BAND. Amended Part 15 of the rules to make an additional 255 Megahertz spectrum in this proceeding. (Dkt No. 03-122). Action by: the Commission. Adopted: 11/12/2003 by R&O. (FCC No. 03-287). OET, FCC 11/21/2003
- FCC PROPOSES CHANGES IN TECHNICAL REGULATIONS FOR UNLICENSED DEVICES TO FACILITATE DEPLOYMENT OF ADVANCED TECHNOLOGIES AND TO STREAMLINE REGULATIONS TO INCREASE FLEXIBILITY. News Release. (Dkt No 03-201). Adopted: 09/10/2003. News Media Contact: Lauren Van Wazer at (202) 418-0030 OET. Contact Neal McNeil at (202) 418-2408, FCC 9/11/03
- FCC PROPOSES AMENDING CURRENT SPECTRUM REGULATIONS IN ORDER TO PROMOTE WIRELESS SERVICES IN RURAL AMERICA. The FCC adopted a Notice of Proposed Rulemaking proposing ways to amend its spectrum regulations and policies in order to promote the continued rapid and efficient deployment of quality spectrum-based services in rural America. News Release. (Dkt No 03-202). Adopted: 09/10/2003. News Media Contact: Meribeth McCarrick at (202) 418-0654 WTB. Contact Nicole McGinnis at (202) 418-0317, email: Nicole.McGinnis@ fcc.gov or Wayne Leighton at (202) 418-0690, email: Wayne.Leighton@fcc.gov, FCC 9/11/03
- Unlicensed NOI - Should FCC permit unlicensed use of vacant TV spectrum and 3650 - 3700 MHz Band - comments due April 7
- Derived From: Kenneth Carter, Ahmed Lahjouji, Neal McNeal, Unlicensed and Unshackled: A Joint OSP-OET White Paper on Unlicensed Devices and Their Regulatory Issues
, OSP Working Paper 39 p 11 (May 2004)
- In a further attempt to seek opportunities for shared-spectrum unlicensed operation, the FCC has initiated a proceeding to explore the possibility of permitting unlicensed devices to operate in the bands reserved for television broadcasting and also in newly available spectrum at 3650 - 3700 MHz.20 In December 2002, the Commission released a Notice of Inquiry ("NOI") seeking comment on the feasibility of such a proposal. The NOI observed that, there are many broadcast channels that remain unavailable for TV use in specific areas to avoid co-channel interference problems. One example is that Channel 4 is a broadcast channel in New York City and Channel 3 is a broadcast channel in Philadelphia. As a result, Channel 3 is vacant in New York City and Channel 4 is unused in Philadelphia. While high power TV stations in close proximity using the same frequencies would almost certainly interfere with each other (co-channel interference), low-power, unlicensed devices may be able to operate in those vacancies without the risk of producing harmful interference to TV broadcast stations many miles away. When considering the 3650 - 3700 MHz band, the FCC suggested that allowing unlicensed operation with minimal technical requirements could permit the development of innovative types of unlicensed devices, for instance with power levels exceeding 1 Watt, that would not be allowed to operate under the current rules elsewhere. Provided this proceeding leads to manageable implementation strategies, the spectrum available for unlicensed operation will once again increase.
- FCC Proposes Amendments to Part 15 Rules to Facilitate Deployment of New High Speed Wireless Devices, FCC News Release May 10, 2001
| Ultra-wideband (UWB) Radio Systems ET Docket No. 98-153 Notice of Inquiry Released September 1, 1998. |
[Text |Wordperfect | Press Release | Fed Reg Notice ]
Comment due: December 7, 1998
Replies due: January 4, 1999 February 3, 1999 | Order extending deadline |
FCC Mulls Wider Commercial Use of Radical Radio Technology, NY Times (December 21, 1998)
NTIA released its report, Assessment of Compatibility between Ultrawideband (UWB) Systems and Global Positioning Systems (GPS) Receivers. The report is available in pdf and WordPerfect formats. An NTIA/ITS companion report describes the laboratory measurements used for this report. [Media Advisory], NTIA 3/12/01
REVISION OF PART 15 OF THE COMMISSION'S RULES REGARDING ULTRA-WIDEBAND TRANSMISSION SYSTEMS. Clarified Part 15 of the regulations with regard to the parties that are eligible to operate ultra-wideband imaging systems, specifically ground penetrating radar (GPR) and wall imaging systems. (Dkt No. 98-153). Action by: Chief, Office of Engineering and Technology. Adopted: 07/12/2002 by ORDER. (DA No. 02-1658). OET, FCC 7/15/02
OET ESTABLISHES WAIVER PROCESS TO PERMIT EXISTING ULTRA WIDEBAND DEVICES TO CONTINUE OPERATION. News Release. (Dkt No 98-153). News Media Contact: Lisa Gaisford (202) 418-7280 OET. Contact John Reed (202) 418-2455, FCC 7/15/02
REVISION OF PART 15 OF THE COMMISSION'S RULES REGARDING ULTRA WIDEBAND TRANSMISSION SYSTEMS. Amended Part 15 of our rules to permit the marketing and operation of certain types of new products incorporating ultra-wideband technology. (Dkt No. 98-153). Action by: By the Commission. Adopted: 02/14/2002 by R&O. (FCC No. 02-48). OET FCC-02-48A1.doc FCC-02-48A1.pdf FCC-02-48A1.txt, fcc 4/24/02
FCC Schedules Ultra Wideband Show, Internet News 2/12/03
FCC to Host Cutting Edge Ultra-Wideband Technology Demonstrations on Thursday February 13, 2003, FCC 2/12/03
FCC Gauges Ultra Wideband, Internet News 2/14/03
Going Ultra Wideband, Newsfactor 4/29/02
FCC Approves Ultra-Wideband Technology Use, Newsbytes 2/15/02
FCC May Deal Blow To Ultra-Wideband, LA Times 2/15/02
Controversial wireless technology gets cautious approval from FCC, MSNBC 2/15/02
FCC OKs ultra- wideband wireless, NWFusion 2/15/02
Loss of power, CNET 2/15/02
U.S. Approves Ultra-Wideband Technology, Newsfactor 2/15/02
Secretary Evans commends the Federal Communications Commission on ultrawideband. (02-14-02), NTIA 2/15/02
FCC approves use of ultrawideband technology, Nando 2/15/02
FCC Allows Ultra-Wideband Use, Wash Tech 2/15/02
FCC Set to OK New Wireless System - Ultrawideband, LA Times 1/4/02
FCC Postpones Action On Ultrawideband Technology, Wash Tech 12/14/01
Ultra-Wideband: Great Promise, ISP Planet 6/10/02
Critics Blast FCC On ULtrawideband, Infoworld 6/5/02
House Panel Urges UWB Proceedings, Internet News 6/5/02
House Ultrawide Band Hearing, House 6/5/02
Ultra Wideband Wireless Networks by Steve Steinke Network Magazine Nov 2001
Report: Ultrawide band devices interfere with GPS, CW 3/12/01
New Ultrawideband Technology Makes Headway, ZDNet 01/29/01
UNII
| UNII Additional Spectrum for Unlicensed |
Order FCC Makes Additional Spectrum Available for Unlicensed Use., FCC, 11/14/2003
As part of its ongoing effort to promote more flexible, innovative, and market driven uses of the radio spectrum, the FCC today made available an additional 255 megahertz of spectrum in the 5.470-5.725 GHz band for unlicensed devices. In the Report and Order approved yesterday, the Commission made the spectrum available for use by unlicensed National Information Infrastructure (U-NII) devices, including Radio Local Area Networks (RLANs), operating under Part 15 of the FCC's rules. This increases the spectrum available for use by unlicensed devices in the 5 GHz region of the spectrum by nearly 80% -- and is a significant increase in the spectrum available for unlicensed devices across the overall radio spectrum. This action will also harmonize the spectrum available for these U-NII devices throughout the world, enabling manufacturers to reduce product development costs by allowing the same products to be used in many parts of the world.The additional available spectrum for U-NII devices will enable continued growth and innovation in wireless broadband services, including services offered by wireless internet service providers (WISPs). WISPs use unlicensed devices to provide a broadband alternative for rural and underserved areas. Although they are a relatively nascent industry, their deployment rates have been increasing rapidly. In addition to making additional spectrum available for U-NII devices, the Commission also adopted several allocation changes consistent with the results of the 2003 World Radio Conference and an agreement reached with the U.S. Department of Defense, the National Telecommunications and Information Administration (NTIA). These changes will ensure that critical Federal Government operations are protected from harmful interference. In addition to the allocation changes, to provide federal users with additional protection from harmful interference, the Order requires that U NII devices operating in the 5.250 5.350 GHz and the 5.470 5.725 GHz bands employ dynamic frequency selection (DFS) - a listen-before-talk mechanism -- and transmit power control (TPC). Action by the Commission November 12, 2003, by Report and Order (FCC 03 287). Chairman Powell, Commissioners Abernathy, Copps, Martin, and Adelstein. Chairman Powell issuing a statement and Commissioner Abernathy issuing a separate statement. Office of Engineering and Technology contact: Ahmed Lahjouji at (202) 418-2061
Washington, DC - As part of its ongoing effort to promote more flexible, innovative, and market driven uses of the radio spectrum, the FCC today proposed to make available for unlicensed use an additional 255 megahertz of spectrum in the 5.470-5.725 GHz band.
In a Notice of Proposed Rulemaking (NPRM) approved today, the Commission proposed that this spectrum be made available for use by unlicensed National Information Infrastructure (U-NII) devices, including Radio Local Area Networks (RLANs), operating under Part 15 of the FCC's rules. This would increase the spectrum available for use by unlicensed devices in the 5 GHz region of the spectrum by nearly 80% -- and, it represents a significant increase in the spectrum available for unlicensed devices across the overall radio spectrum. The Commission also proposed additional technical requirements for U-NII devices, including transition periods for implementation of these requirements.
The Commission stated that the increased capacity gained from access to this added spectrum, coupled with the ease of deployment and operational flexibility provided by our U-NII rules, will foster the development of a wide range of new and innovative unlicensed devices and lead to further wireless broadband access and investment. The Commission also noted that this action advances the policies set forth in the Spectrum Policy Task Force Report issued last fall, which specifically recommended that additional spectrum be provided for unlicensed use.
This action responds to a petition for rulemaking filed by the Wireless Ethernet Compatibility Alliance (WECA now known as the WiFi Alliance). In agreement with WECA, the Commission recognized that this proposal aligns the frequency bands used by U-NII devices with those in many other parts of the world, enabling more widespread use of the same digital communications products and decreasing development costs for U.S. manufacturers.
The Commission also proposed several allocations actions consistent with both the
U.S. WRC-03 position and an agreement reached by the U.S. Department of Defense, National Air and Space Administration (NASA), the National Telecommunications and Information Administration (NTIA), and the FCC regarding the 5 GHz band.
Action by the Commission May 15, 2003, by Notice of Proposed Rulemaking in ET Docket No. 03-122, (FCC 03-110). Chairman Powell, Commissioners Abernathy, Copps, Martin, and Adelstein. Separate statements issued by Chairman Powell, Commissioners Abernathy, Adelstein with joint statement issued by Commissioners Copps and Martin.
ADDITIONAL SPECTRUM FOR UNLICENSED DEVICES BELOW 900 MHZ AND IN THE 3 GHZ BAND. Issued Order extending the time to file comments and reply comments. This extension of time is believed to provide beneficial information to the record in the proceeding and will not cause undue delay. (Dkt No. 02-380). Action by: Chief, Office of Engineering and Technology. Comments Due: 04/17/2003. Reply Comments Due: 05/16/2003. Adopted: 03/28/2003 by ORDER. (DA No. 03-1022). OET, FCC 4/1/03 In a Notice of Proposed Rulemaking (NPRM) approved today, the Commission proposed that this spectrum be made available for use by unlicensed National Information Infrastructure (U-NII) devices, including Radio Local Area Networks (RLANs), operating under Part 15 of the FCC's rules. This would increase the spectrum available for use by unlicensed devices in the 5 GHz region of the spectrum by nearly 80% -- and, it represents a significant increase in the spectrum available for unlicensed devices across the overall radio spectrum. The Commission also proposed additional technical requirements for U-NII devices, including transition periods for implementation of these requirements.
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SuperNET / UNII Wireless Network Connections ET Docket No. 96-102, RM-8648, RM-8653 |
"A Memorandum Opinion and Order ("MO&O") was adopted on June 17, 1998, and released June 24, 1998, addressing two Petitions for Reconsideration and a Petition for Clarification. The MO&O amend Part 15 of our rules to permit fixed, point-to-point Unlicensed National Information Infrastructure ("U-NII") devices in the 5.725-5.825 GHz band to operate with one watt ("W") maximum transmitter output power and directional antennas of up to 23 dBi gain. We also amended our rules to specify transmit power limits in the form of a logarithmic equation as a function of channel bandwidth. We also clarify our rules regarding unwanted emissions and specify these limits in terms of absolute radiated power levels. Further, this action clarifies and addresses other issues raised in the petitions regarding the operation of, and regulations
governing, U-NII devices.
"On January 9, 1997, a Report and Order was adopted and released in this proceeding. The Report and Order amends Part 15 of its rules to make available 300 megahertz of spectrum at 5.15-5.35 GHz and 5.725-5.825 GHz for use by a new category of unlicensed equipment, called Unlicensed National Information Infrastructure ("U-NII") devices. These devices will provide short-range, high speed wireless digital communications on an unlicensed basis. We anticipate that U-NII devices will support the creation of new wireless local area networks ("LANs") and will facilitate wireless access to the National Information Infrastructure ("NII"). In order to permit significant flexibility in the design and operation of these devices, we are adopting the minimum technical rules necessary to prevent interference to other services and to ensure that the spectrum is used efficiently. We believe that the rules set forth herein will foster the development of a broad range of new devices and communications options that will stimulate economic development and the growth of new industries. We also expect that this action will promote the ability of U.S. manufacturers, including small businesses, to compete globally by enabling them to develop unlicensed digital
communications products for the world market.
"On April 25, 1996, a Notice of Proposed Rule Making (NPRM) was adopted and released May 6, 1996. Comment period for the NPRM has been established: comments due July 15, 1996, and reply comments due August 14, 1996. In the NPRM, the Commission proposed to make available 350 megahertz of spectrum at 5.15 - 5.35 GHz and 5.725 -5.875 GHz for use by a new category of unlicensed equipment, called NII/SUPERNeT devices. These devices would provide short-range, high-speed wireless digital communications on an unlicensed basis. The Commission anticipates that these NII/SUPERNet devices will support the creation of new wireless local area networks ("LANs") and will facilitate wireless access to the National Information Infrastructure ("NII")." OET Hot Topics.
| Released July 1999 |
Proceeding Closed |
AMENDMENT OF PART 15 OF THE COMMISSION'S RULES REGARDING SPECTRUM DEVICES ET Docket No. 99-231
COMMISSION AMENDS PART 15 OF RULES TO FACILITATE TECHNOLOGY FOR HIGH SPEED WIRELESS SERVICES. The FCC amended its rules to allow frequency hopping spread spectrum systems in the 2.4 GHz band (2400-2483.5 MHz) to use wider hopping channels. by R&O. Action by: the Commission. Dkt No.: ET-99-231. (FCC No. 00-312) News Media Contact: Rosemary Kimball (202)
418-0500. OET Contact: Neal McNeil at (202) 418-2408. News Release | Order
According to Boardwatch, "The Home RF Working Group also isn't happy with its current 1 MHz frequency-hopping channels in the unlincesed 2.4 GHz spectrum, so it's petitioned the FCC to allow channel width of 5 MHz... In July 1999, the FCC issued a proposed rule change taht would implement the 5 MHz scheme. Public comment brought a blast of criticism from the 802.11b/direct-sequence camp, charging that the interference would cause to 802.11b devices would be unacceptable. At this writing, its not clear if the FCC will withdraw the proposal or not." Scott Mace, The 2.4 GHz Traffic Jam, Boardwatch (July 2000).
- Proceeding intiated 1989, order released 1990.
- 1985: Authorization of Spread Spectrum and other Wideband Emissions not Presently Provided for in the FCC Rules and Regulations, Dkt 81-413, First Report and Order (May 24, 1985) opening spectrum to unlicensed use
- "The world's first general authorization for civil spread spectrum was in May 1985 in FCC Docket 81-413. This included the rules that WiFi, Fluetooth, and the majority of cordless phones sold in the US operate under." Michael Marcus, Early Civil Spread Spectrum History
- 1984: Notice of Proposed Rulemaking
Dkt 81-413 ("we are proposing in this Notice
of Proposed Rulemaking rules that would authorize the use of spread spectrum under conditions that prevent harmful
interference to other authorized users of the spectrum. We anticipate that this authorization will stimulate innovation
in this technology, while meeting our statutory goal of controlling interference.")
- In the Matter of Authorization of spread spectrum and other wideband emissions not presently provided for in the FCC Rules and Regulations, Notice of Inquiry, 46 Fed. Reg. 51259; 87 FCC 2d
876, Dkt 81-413 (Adopted: June 30, 1981; Released September 15, 1981)
- VIDEO of Michael Marcus from the FCC Meeting
- 1. The Federal Communications Commission is initiating this Inquiry to gather information that will assist it in formulating policy regarding the use of wideband emissions. The Commission has before it a number of requests, both formal and informal, to authorize systems employing wideband modulation techniques for such diverse services as communications, radiolocation and telemetry operations. Because of the fundamental differences between wideband and narrowband types of modulation, the present Commission Rules and Regulations do not appear to provide the proper mechanisms for dealing with these requests. Indeed, our present rules implicitly forbid the use of some new technologies in this area.
- 2. Basically, a system employing wideband modulation takes an information signal of a small bandwidth and after modulation of a radio carrier, produces a radio frequency (RF) signal of a much larger bandwidth. Although conventional amplitude modulation (AM) and frequency modulation (FM) do result in spreading the information signal's bandwidth, the resultant RF bandwidth is still comparable to the bandwidth of the baseband signal. The modulation technique used in the FM broadcasting service increases the baseband signal's bandwidth by approximately a factor of sixteen. Although this is an example of wideband modulation, the FM broadcast signal's bandwidth still remains less than 240 kilohertz. In the context of this Inquiry, we shall concern ourselves with modulation techniques in which the baseband signal's bandwidth is greatly expanded; in some cases expansions of 1000 will be typical. This may result in RF bandwidths of many megahertz.
- 3. This Inquiry is designed to serve two purposes. We hope to gather information to: 1) assist us in identifying specific radio services presently authorized by the Commission, as well as ideas for new services, where the authorization of wideband modulation techniques would serve the public interest; and 2) identify the technical parameters which characterize a wideband emission, including procedures used to measure these parameters, and identify technical standards necessary to insure operation of a minimum interference basis.
- "On March 6, 1981 the Private Radio Bureau issued a Special Temporary Authorization (STA) to the Amateur Radio Research and Development Corporation (AMRAD) for the purpose of conducting experiments on spread spectrum modulation. In order to permit spread spectrum, the STA waived two sections of the Commission's Rules." NOI n 4.
- April 14, 1980, Equatorial was granted permission to provide a 9600 bit per second data distribution service using spread spectrum transmissions
- Del Norte Technology, Inc., Petition for Rulemaking, General Docket 80-135, filed May 10, 1979.
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