Multiplex communications – Communication over free space
Reexamination Certificate
2007-07-16
2010-06-29
Patel, Ajit (Department: 2617)
Multiplex communications
Communication over free space
C370S474000, C370S394000
Reexamination Certificate
active
07746812
ABSTRACT:
A wireless receiver operating in a wireless communication environment in which a beginning of a packet contains a repetitive sequence. The wireless receiver may compute a variance (example of a measure of variations in the cross correlation values) of cross-correlation values obtained by cross correlating a received signal and a copy of the preamble sequence starting at different time instances. When a valid packet is received, the variance of the values resulting from the cross correlation is high, otherwise the variance is low. As a result packet detection is made robust, and false packet detection due to interference signals is reduced. In an embodiment, the wireless receiver is implemented in the context of WLAN 802.11 a/g network.
REFERENCES:
patent: 6426983 (2002-07-01), Rakib et al.
patent: 6477196 (2002-11-01), Swanke et al.
patent: 6577670 (2003-06-01), Roberts
patent: 6768517 (2004-07-01), Limberg et al.
patent: 6807222 (2004-10-01), Widdowson
patent: 2002/0006174 (2002-01-01), Nafie et al.
patent: 2002/0057726 (2002-05-01), Williams et al.
patent: 2006/0215795 (2006-09-01), Nafie et al.
patent: 2007/0055501 (2007-03-01), Aytur et al.
patent: 2008/0037458 (2008-02-01), Myszne
patent: 2009/0060104 (2009-03-01), Sher et al.
patent: 812069 (1996-12-01), None
patent: 0046929 (2000-08-01), None
Bhukania Bijoy
Puvvada Naga Satya Srikanth
Brady W. James
Patel Ajit
Shaw Steven A.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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