Bit level diversity combining for COFDM system

Details Bit level diversity combining for COFDM system Bit level diversity combining for COFDM system

2007-06-26

2007-06-26

Corrielus, Jean B (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S349000, C375S267000, C375S340000

Reexamination Certificate

active

10185385

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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