CDMA communications and geolocation system and method

Details CDMA communications and geolocation system and method CDMA communications and geolocation system and method

1994-09-23

1996-04-09

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

342457, H04B 169

Patent

active

055068642

ABSTRACT:
A spread-spectrum CDMA communications system for locating remote units, and for communicating message data between a plurality of remote units and a base station. The spread-spectrum CDMA communications system includes a plurality of base stations and a plurality of remote units. A base station has a spread-spectrum modulator for spread-spectrum processing the message data, and a transmitter for transmitting the spread-spectrum processed-message data, combined with a generic-chip-code signal, from the base station to a remote unit. The base station also has an antenna, and spread-spectrum detectors for recovering message-data communicated from the remote-units. A remote-unit has an antenna, and a detector coupled to the antenna for recovering data communicated from the base station. The detector includes a spread spectrum demodulator. Also, the remote unit has a device for converting the format of the data into a form suitable for communicating over radio waves, a spread spectrum modulator and a transmitter. The base station has a range circuit, which comparers the generic-chip-code signal generated at the base station with the generic-chip-code signal received from the remote unit, for determining a range between the remote unit and the base station.

REFERENCES:
patent: 4392220 (1983-07-01), Hirosaki
patent: 4435821 (1984-03-01), Ito et al.
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4752939 (1988-06-01), Amoroso et al.
patent: 4765753 (1988-08-01), Schmidt
patent: 4862178 (1989-08-01), Sturza et al.
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 4962507 (1990-10-01), Renshaw
patent: 4979183 (1990-12-01), Cowart
patent: 5056106 (1991-10-01), Wang et al.
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5062121 (1991-10-01), Kurihara et al.
patent: 5063560 (1991-11-01), Yerbury et al.
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5153598 (1992-10-01), Alves, Jr.
patent: 5166694 (1992-11-01), Russell et al.
patent: 5216429 (1993-06-01), Nakagawa et al.
patent: 5218618 (1993-06-01), Sagey
patent: 5228056 (1993-07-01), Schilling
patent: 5247702 (1993-09-01), Su et al.
patent: 5265121 (1993-11-01), Stewart
patent: 5267244 (1993-11-01), Messerschmitt et al.
patent: 5365544 (1994-11-01), Schilling
In the matter of InterDigital Technology Corporation v. Oki America et al; Defendant Qualcomm Incorated's Supplemental Responses to Plaintiff's Interrogtories 3, 5, 12 and 13; United States District Court for the Eastern District of Pennsylvania, Civil Action No. 93 -CV2004 (Bartle, J.).

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