Receiving unit, soft information data processor and decoding met

Details Receiving unit, soft information data processor and decoding met Receiving unit, soft information data processor and decoding met

1996-02-22

1998-09-15

Vo, Don N.

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375347, 375349, 371 437, 371 438, 370342, 370479, H03M 1312

Patent

active

058090894

ABSTRACT:
The present invention comprises: M units of Bessel function calculation means for inputting M signals X.sub.1 to X.sub.M that are produced by performing a reception signal high-speed Hadamard's transformation and outputting M modified Bessel functions Y.sub.1 to Y.sub.M corresponding to the signals; and K units of bit metric calculation means having addition means for adding the modified Bessel functions Y.sub.1 to Y.sub.M to each bit of k bits according to codes that are determined for cases of assumption that 0 is transmitted and 1 is transmitted and logarithm calculation means for calculating logarithm of output from the addition means for obtaining soft information.

REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5442629 (1995-08-01), Viterbi et al.
patent: 5450453 (1995-09-01), Frank

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