Method and apparatus for simultaneous wideband and narrowband wi

Details Method and apparatus for simultaneous wideband and narrowband wi Method and apparatus for simultaneous wideband and narrowband wi

1994-01-04

1997-06-17

Olms, Douglas W.

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

H04J 1300

Patent

active

056403852

ABSTRACT:
A wireless communication system for simultaneously communicating overlapping wideband and narrowband signals. The system includes a transmitting station for embedding one or more narrowband signals (3-5) in a wideband signal (1) having a frequency spectrum encompassing the narrowband signals, and transmitting the resulting composite wideband signal (2). The system also includes a receiving station for receiving a composite wideband signal (60) and separating the embedded narrowband signal(s) (62, 63) from the wideband signal (61). In one embodiment, a cellular radiotelephone base station (35) is operable as both the transmitting and receiving station, communicating with remote subscriber units (29-31) having conventional transceivers (FDMA, TDMA and/or CDMA). The base station transmitter circuitry (10-17) includes FM and CDMA signal generators (10, 12), a combiner (15) for embedding the narrowband signal (3-5) in the wideband signal (1), and an AGC (14) and power detectors (11, 13) for controlling the narrowband signal power. The receiving circuitry includes a CDMA processing circuit having an FFT circuit (41), a threshold detector (42), a notch filter (43), and an inverse FFT circuit (44) for separating narrowband signals (62, 63) from the CDMA signal (61).

REFERENCES:
patent: 4425642 (1984-01-01), Moses et al.
patent: 4476559 (1984-10-01), Brolin et al.
patent: 4567586 (1986-01-01), Roeck
patent: 5022046 (1991-06-01), Morrow et al.
patent: 5109417 (1992-04-01), Fielder et al.
patent: 5123014 (1992-06-01), Federkins et al.
patent: 5175743 (1992-12-01), Crespo et al.
patent: 5235612 (1993-08-01), Stilwell et al.
patent: 5278826 (1994-01-01), Murphy et al.
Schilling et al., Broadband CDMA for Personal Communications Systems, IEEE Communications Magazine, Nov. 1991, pp. 86-93.
Schilling, D. L., B-CDMA Cellular Overlay to Increase Cellular Capacity by 500 Users.

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