Method and apparatus for encoding and decoding a digital radio s

Details Method and apparatus for encoding and decoding a digital radio s Method and apparatus for encoding and decoding a digital radio s

1994-05-04

1996-09-24

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

371 501, G06F 1200

Patent

active

055595065

ABSTRACT:
A selective call receiver (105) for use in a selective call communication system (100) and a controller (206). The receiver (203) is for receiving and demodulating a digital signal which includes a predetermined sequence of A.times.N interleaved symbols representing a non-interleaved set of N tiers of symbols, each tier having A symbols, wherein A and N are positive integers. The controller (206) includes a deinterleaver (830) which reconstructs the non-interleaved set of N tiers of symbols from the demodulated signal, and a decoder (950) detects and corrects errors in the deinterleaved set of N tiers of symbols. The digital signal is transmitted simultaneously from two transmitters (103) having a difference frequency 1/P, and the symbols are transmitted at a rate of SPS symbols per second. The period of the difference frequency is given by P=(A.times.N)/SPS.

REFERENCES:
patent: 3200374 (1965-08-01), Ballard
patent: 5063533 (1991-11-01), Erhart et al.
patent: 5168493 (1992-12-01), Nelson et al.
Chase, "A Combined Coding And Modulation Approach For Communications Over Dispersive Channels", IEEE Transactions On Communications, vol. COM-21, No. 3, Mar. 1973, pp. 162-164.

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