Differential detector with error correcting function

Details Differential detector with error correcting function Differential detector with error correcting function

1998-02-20

2000-05-30

Bocure, Tesfaldet

Pulse or digital communications

Receivers

Angle modulation

329300, H04L 2722

Patent

active

060699248

ABSTRACT:
A differential detector imparted with error correcting function for detecting a differentially phase shifted signal while performing error correction includes a one-symbol differential detector for performing phase comparison between a current input signal and a signal preceding by one symbol, a delay circuit for delaying a one-symbol differential detection signal by two symbol periods, a two-symbol differential detector for performing phase comparison between the current input signal and an input signal preceding by two symbol periods, a four-symbol differential detector for performing phase comparison between the current input signal and an input signal preceding by four symbol periods, and two error correction circuits. By making use of the four-symbol differential detection signal, error correction of the two-symbol differential detection signal is performed by the error correction circuit while error correction of the one-symbol differential detection signal is performed by using the corrected two-symbol differential detection signal. By diminishing the error of the two-symbol differential detection signal, the error correcting capability for the one-symbol differential detection signal is enhanced with bit error rate characteristic being improved.

REFERENCES:
patent: 5241567 (1993-08-01), Shimakata
patent: 5440265 (1995-08-01), Cochran et al.
patent: 5461646 (1995-10-01), Klomars

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