Automatic channel polarity detection and correction arrangement

Details Automatic channel polarity detection and correction arrangement Automatic channel polarity detection and correction arrangement

1987-10-26

1989-02-21

Pellinen, A. D.

Pulse or digital communications

Spread spectrum

Direct sequence

375 84, H04L 700

Patent

active

048072613

ABSTRACT:
A circuit arrangement automatically detects and corrects received data in an FSK signalling scheme wherein FSK data symbols are represented by a grey code-like numbering system and a predetermined word sync pattern leads each data transmission. The arrangement includes a memory (226) for prestoring data representative of the word sync pattern, a comparator (224) for comparing the prestored word sync pattern with the received data, an error detection circuit (228-252) for determining if the grey code-like numbering system has been transposed, and an error correcting circuit (220) for automatically correcting the transposition in the data.

REFERENCES:
patent: 3921103 (1975-11-01), Burger
patent: 4263673 (1981-04-01), Bingham et al.
patent: 4409562 (1983-10-01), Kurihara

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