[특허]Spread spectrum cellular overlay CDMA communications system

Spread spectrum cellular overlay CDMA communications system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04K-001/00 H04L-027/10
출원번호	US-0779175 (1991-10-17)
발명자 / 주소	Miller Frank (Summit NJ) Schilling Donald L. (Sands Point NY)
출원인 / 주소	Interdigital Technology Corporation (Wilmington DE 02)
인용정보	피인용 횟수 : 62 인용 특허 : 0

초록 ▼

A spread spectrum CDMA communications system for communicating message data between a plurality of users to a plurality of PCN units. The spread spectrum communications system is located within a same geographical region as occupied by a pre-existing system such as a cellular telephone system or microwave system. The spread spectrum CDMA communications system can operate without causing undue interference to the cellular telephone system or microwave system and the cellular telephone system or microwave system can operate without causing significant interference, less than 1% total users affected, to the PCN system. The spread spectrum CDMA communications system includes a plurality of PCN-base stations and a plurality of PCN units. A PCN-base station has a device for converting the format of the message data into a form suitable for communicating over radio waves, a spread spectrum modulator for spread spectrum processing the message data, and a transmitter for transmitting the spread spectrum processed converted message data from the PCN-base station to a PCN unit. The PCN-base station also has an antenna, and spread spectrum detectors for recovering message data communicated from the PCN units. A PCN unit has an antenna, and a detector coupled to the antenna for recovering message data communicated from the PCN-base station. The detector includes a spread spectrum demodulator. Also, the PCN unit has a device for converting the format of the message message data into a form suitable for communicating over radio waves, a spread spectrum modulator, and a transmitter.

대표청구항 ▼

A spread spectrum code division multiple access (CDMA) communications system for communicating message data between a plurality of personal communications network (PCN) units, said spread spectrum communications system located within a same geographical region as occupied by a pre-existing communications system using a pre-existing-system frequency and a pre-existing-system bandwidth, said spread spectrum CDMA communications system comprising: a plurality of PCN-base stations located within the same geographical area as occupied by the pre-existing communications system for communicating message data to the plurality of PCN units, each of said PCN-base stations including, base means for converting the format of the message data for communicating over radio waves; base-product means for spread spectrum processing the converted message data with a spread-spectrum bandwidth of at least 30 MHz; and base means for transmitting across the pre-existing-system bandwidth, the spread-spectrum-processed-converted message data from the PCN-base station to a PCN unit; a plurality of PCN units, each of said PCN units including, a PCN antenna; and PCN detection means coupled to said PCN antenna and including PCN-spread-spectrum-processing means, for recovering message data communicated from said PCN-base station; and wherein said plurality of PCN-base stations are geographically spaced with the power radiated by each base-transmitting means within a respective microcell varies inversely with distance by an exponent of approximately two, and with the power radiated by each base-transmitting means outside a respective microcell varies inversely with distance by an exponent greater that two.

이 특허를 인용한 특허 (62)

Scott Logan, Antenna diversity techniques.
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Scott, Logan, Antenna diversity techniques.
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Lomp, Gary R.; Ozluturk, Faith M.; Kowalski, John, Automatic power control system for a code division multiple access (CDMA) communications system.
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Lomp,Gary; Ozluturk,Fatih; Kowalski,John, Automatic power control system for a code division multiple access (CDMA) communications system.
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Donald L. Schilling, Broadband CDMA overlay system and method.
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Schilling Donald L., Broadband CDMA overlay system and method.
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Schilling Donald L. (Sands Point NY), Broadband CDMA overlay system and method.
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Schilling,Donald L., Broadband CDMA overlay system and method.
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Ariyoshi Masayuki,JPX ; Doi Nobukazu,JPX ; Shiga Tesshin,JPX ; Ohta Yoshito,JPX, CDMA Communication system and method.
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Ariyoshi Masayuki,JPX ; Doi Nobukazu,JPX ; Shiga Tesshin,JPX ; Ohta Yoshito,JPX, CDMA communication system and method.
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Ariyoshi, Masayuki; Doi, Nobukazu; Shiga, Tesshin; Ohta, Yoshito, CDMA communication system and method.
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Ariyoshi, Masayuki; Doi, Nobukazu; Shiga, Tesshin; Ohta, Yoshito, CDMA communication system and method.
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Donald L. Schilling, CDMA communications and geolocation system and method.
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Schilling Donald L., CDMA communications and geolocation system and method.
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Ozluturk, Fatih M.; Jacques, Alexander M.; Lomp, Gary R.; Kowalski, John, Code division multiple access (CDMA) communication system.
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Gustafson Warren H., Code-division multiple-access cellular system employing overlaid cells.
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Anderson Gary B. ; Gavette Sherman ; Lindsay Charles L. ; Jensen Ryan N., Communication system and method.
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Snelling Richard K. ; McIntosh P. Stuckey ; Taylor John C. W. ; Tucker Mark, Communications webs for PSTN subscribers.
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Richard K. Snelling ; P. Stuckey McIntosh ; John C. W. Taylor ; Mark Tucker, Communications webs with personal communications links for PSTN subscribers.
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Chalmers Harvey, Digital downconverter/despreader for direct sequence spread spectrum CDMA communications system.
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Chalmers Harvey (Rockville MD), Digital downconverter/despreader for direct sequence spread spectrum communications system.
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Ramirez,Dalier J.; Hughes,James David; Rockwell,Ronald R., Extending battery life in communication devices having a plurality of receivers.
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Davidovici Sorin ; Kanterakis Emmanuel, Fuzzy-logic spread-spectrum adaptive power control.
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Davidovici Sorin ; Kanterakis Emmanuel, Fuzzy-logic spread-spectrum adaptive power control.
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Snelling Richard K. (Alpharetta GA) McIntosh P. Stuckey (59 E. Park La. Atlanta GA 30309) Tucker Mark (Norcross GA), Home personal communication system.
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Anderson, Gary B.; Petch, Bryan K.; Peterson, Peter O.; Jensen, Ryan N.; Gavette, Sherman, Method and Apparatus for wireless spread spectrum communication with preamble processing period.
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Ozluturk, Fatih; Lomp, Gary R.; Kowalski, John, Method and apparatus for adaptive power control for spread-spectrum communications.
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Scott Logan, Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals.
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Ozluturk, Fatih; Lomp, Gary, Method and subscriber unit for performing power control.
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Anderson Gary B. ; Peterson Peter O., Method and system for data link expansion or contraction using spread spectrum TDMA communication.
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Anderson Gary B. ; Petch Bryan K. ; Peterson Peter O. ; Jensen Ryan N. ; Gavette Sherman, Method and system for mobile controlled handoff and link maintenance in spread spectrum communication.
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Haberman Michael ; Pierson Glenn, Method and system for providing a handoff from a CDMA cellular telephone system.
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Haberman Michael ; Pierson Glenn, Method and system for providing a handoff from a CDMA cellular telephone system.
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Smith Douglas G. (Arlington VA) Dixon Robert C. (Palmer Lake CO) Vanderpool Jeffrey S. (Colorado Springs CO), Multi-band, multi-mode spread-spectrum communication system.
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Smith Douglas G. ; Dixon Robert C. ; Vanderpool Jeffrey S., Multi-band, multi-mode spread-spectrum communication system.
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Smith Douglas G. ; Dixon Robert C. ; Vanderpool Jeffrey S., Multi-band, multi-mode spread-spectrum communication system.
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Smith Douglas G. ; Dixon Robert C. ; Vanderpool Jeffrey S., Multi-band, multi-mode spread-spectrum communication system.
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Schilling, Donald L., Multiple-input multiple-output (MIMO) spread-spectrum system and method.
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Anderson, Gary B.; Jensen, Ryan N.; Petch, Bryan K.; Peterson, Peter O., PCS pocket phone/microcell communication over-air protocol.
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Schilling Donald L., Personal communication network unit for use in a spread spectrum communication system overlaying a microwave system.
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Richard K. Snelling ; P. Stuckey McIntosh ; John C. W. Taylor ; Mark Tucker, Spectrum monitoring for PSTN subscribers.
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Schilling Donald L. (Sands Point NY), Spread spectrum CDMA communications system.
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Schilling, Donald L., Spread spectrum base station.
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Schilling, Donald L., Spread spectrum base station notch filtering transmitted signals.
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Schilling, Donald L., Spread spectrum base station notch filtering transmitted signals.
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Schilling,Donald L., Spread spectrum communication system and method using a reference signal and a plurality of message signals.
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Schilling,Donald L., Spread spectrum communications using a reference and a message signal system and method.
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Donald L. Schilling, Spread spectrum microwave overlay with notch filter.
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Schilling Donald L., Spread spectrum microwave overlay with notch filter.
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Nago Hidetada,JPX, Spread spectrum modulation communication apparatus for narrow band interference elimination.
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Schilling, Donald L., Spread spectrum remote unit.
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Jeffrey S. Vanderpool, Spread spectrum wireless communication system.
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Vanderpool, Jeffrey S., Spread spectrum wireless communication system.
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Vanderpool,Jeffrey S., Spread spectrum wireless communication system.
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Vanderpool Jeffrey S., Spread spectrum wireless telephone system.
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Vanderpool Jeffrey S., Spread spectrum wireless telephone system.
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Smith Douglas G. ; Dixon Robert C. ; Vanderpool Jeffrey S., Spread-spectrum data publishing system.
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Lupien Francis,CAX, System and method of informing a radio telecommunications network of the operating capabilities of a mobile terminal located therein.
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Lomp, Gary; Ozluturk, Fatih; Silverberg, Avi, Transferring voice and non-voice data.
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Anderson Gary B. ; Jensen Ryan N. ; Petch Bryan K. ; Peterson Peter O., Wireless communication method and system.
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Anderson Gary B. ; Petch Bryan K. ; Peterson Peter O. ; Jensen Ryan N. ; Gavette Sherman, Wireless communication system and method.
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Davies,Douglas Allan, Wireless transmission evaluation system and method.
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