Error detection in a wireless LAN environment

Details Error detection in a wireless LAN environment Error detection in a wireless LAN environment

1995-02-24

1998-04-28

Chin, Wellington

Multiplex communications

Diagnostic testing

Fault detection

4552262, 4552264, 455 671, 455 673, 375228, 371 51, H04B 1700

Patent

active

057454795

ABSTRACT:
An apparatus for detecting errors in a wireless communication channel comprises a receiver which receives a data stream from the wireless communication channel, a signal strength indication circuit coupled with the receiver which indicates signal strength for a received data stream, and processing resources coupled to the signal strength indication circuit which monitors the received data signal strength to detect anomalies in the strength of the received data stream, typical of erroneous data. Also, the system includes a signal phase monitoring circuit coupled with the receiver. This circuit indicates phase of the received data stream. Processing resources coupled with the signal phase monitoring circuit, monitor the received data stream phase to detect anomalies in phase of the received data stream typical of erroneous data. In addition, the data stream will include data packets having error detection codes imbedded within the data packets. Processing resources coupled with the receiver are responsive to the error detection codes to detect errors in the data packets. Thus, an error detection system based on monitoring the amplitude, and the phase of a received signal, combined with digital CRC detection techniques provides an efficient error detection system, capable of detecting interference early in transmission, allowing more rapid recovery in retries.

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