Frame format and method for adaptive equalization within an integrated services wireless local area network
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United States of America Patent
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Apr 6, 1999
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N/A
app pub date -
May 10, 1996
filing date -
May 10, 1996
priority date (Note) -
Expired
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Abstract
The function addressed is that of adaptive equalization to mitigate the effects of multiple path radio propagation in the context of point-to-multipoint, time division duplexed microwave radio systems. Without this equalization, fading and intersymbol interference degrades the accuracy of the recovered bit stream. This degradation of the received signal is caused by the vector sum of multiple copies of the transmitted signal arriving with various time offsets and amplitudes. The method employed uses a single training symbol per frame common for all time division multiplexed derived channels rather than one for each channel and for both up and down directions. Compensation is applied at each station transmitter rather than separately equalizing each received signal at the common receiver.
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