Wireless local area network

Details Wireless local area network Wireless local area network

1990-01-02

1991-09-10

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 58, 375 99, 455 60, H04B 702, H04L 102

Patent

active

050480570

ABSTRACT:
In a wireless local area network, predetermined interference-detection sequences of signal points, known at both the transmitter and receiver, are transmitted over a plurality of hopping frequencies along with a sequence of data signal points taken from a modulated code exhibiting built-in diversity. In the receiver, the extent to which there are errors in the received interference-detection signal points is used as a mechanism for identifying the likely occurrence of strong interference. If there are no, or few, errors, decoding proceeds normally. However, if the number of errors is above a predetermined threshold, it is assumed that the transmitted signal was subjected to significant interference and an erasure is declared. This is used as "side" information by the decoder to improve its ability to accurately recover data in the presence of interference.

REFERENCES:
patent: 3423729 (1969-01-01), Heller
patent: 3605019 (1971-09-01), Cutter et al.
patent: 4881241 (1989-11-01), Pommier et al.

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