Channel estimation for OFDM communication systems including...

Details Channel estimation for OFDM communication systems including... Channel estimation for OFDM communication systems including...

2004-04-12

2008-11-18

Nguyen, Tu (Department: 2618)

Multiplex communications

Generalized orthogonal or special mathematical techniques

C455S063100

Reexamination Certificate

active

07453793

ABSTRACT:
Channel estimation techniques are provided for a receiver of a wireless communication system using orthogonal frequency division multiplexing (OFDM), including legacy 802.11a and various extended rate systems. Training signals are received from one or more receive antennas. An estimated channel impulse response is computed from the received training signals by reference to a training sequence. The estimated channel impulse response is truncated in the time domain based on channel power and noise data. Channel response tracking techniques may also be implemented to correct for variations in channel response over the transmission time of a packet.

REFERENCES:
patent: 2002/0065047 (2002-05-01), Moose
patent: 2002/0111142 (2002-08-01), Klimovitch
patent: 2003/0076777 (2003-04-01), Stuber et al.
patent: 2004/0105512 (2004-06-01), Priotti
patent: 2004/0120428 (2004-06-01), Maltsev et al.
“Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications, High-speed physical layer in the 5Ghz Band” IEEE Std. 802.11-1999, Supplement to IEEE Standard for Information 802.11a—1999 Adopted by ISO/IEC and redesignated as ISO/IEC 8802-11:1999/Amd 1:2000 E.

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