Communication system for communicating with a plurality of selec

Details Communication system for communicating with a plurality of selec Communication system for communicating with a plurality of selec

1993-08-26

1995-09-12

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

455 521, 370 23, H04B 700

Patent

active

054506123

ABSTRACT:
A selective call base station (100) for receiving a signal comprising a plurality of communication signals has an Analog-to-Digital (A/D) converter (220) for digitizing the signal. A memory (204) for storing the signal as a plurality of digitized bits (502-518), and a Digital Signal Processor (DSP) (218) for converting each of the plurality of digitized bits (502-518) into a frequency domain signal (FIG. 6) that has a plurality of frequency samples. The memory (204) stores the plurality of frequency samples corresponding to each of the plurality of digitized bits (502-518). A decoder (206, 218) decodes the plurality of communication signals from the plurality of frequency samples. The decoder (206, 218) further includes a generator (718) for generating a window (902) for measuring energy of at least one frequency sample of the plurality of digitized bits (502-518) in each of the plurality of communication signals. A determinator (728) determines the at least one frequency sample of each of the plurality of communication signals having a maximum energy.

REFERENCES:
patent: 4245325 (1981-01-01), Kikuchi et al.
patent: 4701934 (1987-10-01), Jasper
patent: 4823123 (1989-04-01), Siwiak
patent: 4875038 (1989-10-01), Siwiak et al.
patent: 4888793 (1989-12-01), Chanroo
patent: 5260700 (1993-11-01), Merchant et al.
patent: 5299149 (1994-03-01), Morita et al.
patent: 5323391 (1994-06-01), Harrison

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