Bit level diversity combining for COFDM system
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United States of America Patent
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Jun 26, 2007
Issued Date -
N/A
app pub date -
Jun 28, 2002
filing date -
Dec 13, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Bit level, rather than symbol level, diversity combining is employed within a wireless communications receiver. Channel estimates and bit metrics are separately computed for signals received by different antenna elements. Bit metrics are calculated by determining a least squares cumulative difference between all bits within the received symbol and corresponding bits within constellation symbols as modified by the channel estimate. The separately-determined bit metrics are then combined for decoding. Performance improvements over both single antenna systems and multiple antenna systems with symbol level diversity combining are achieved.
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