Communication signal equalization systems and methods

Details Communication signal equalization systems and methods Communication signal equalization systems and methods

2004-08-06

2008-01-15

Anderson, Matthew (Department: 2618)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S208000, C370S210000, C370S480000, C375S260000, C455S506000

Reexamination Certificate

active

07319690

ABSTRACT:
Communication signal equalization methods and systems are disclosed. A CDMA signal having a data portion and a known portion including a known or repeated data sequence and received over a multipath communication channel represents a linear convolution between the multipath channel and a transmitted CDMA signal. A channel estimate of the communication channel is determined from the known portion, and the CDMA signal is translated into a new CDMA signal which is a cyclic convolution with the channel estimate. A frequency domain representation of the new CDMA signal is adjusted using the channel estimate to produce a frequency domain representation of an equalized signal.

REFERENCES:
patent: 6377632 (2002-04-01), Paulraj et al.
patent: 2003/0043887 (2003-03-01), Hudson
patent: 2003/0081763 (2003-05-01), Tang et al.
patent: 2004/0013084 (2004-01-01), Thomas et al.
patent: 2004/0264561 (2004-12-01), Alexander et al.
patent: 2006/0050626 (2006-03-01), Yucek et al.
patent: 2006/0159187 (2006-07-01), Wang et al.
patent: 2006/0203932 (2006-09-01), Palanki et al.
patent: 2007/0132606 (2007-06-01), Reckmann et al.
patent: 2007/0133393 (2007-06-01), Bocquet
“White Paper: Frequency Domain Equalization for Single-Carrier Broadband Wireless Systems”; David Falconer, Lek Ariyavisitakul, Anader Benyamin-Seeyar, and Brian Eidson; Feb. 15, 2002; Retrieved from the Internet <URL: http://www.sce.carleton.ca/bbw/papers/whitepaper2.pdf>.
Swindlehurst, et al. “Direct Semi-Blind Symbol Estimation for MultipathChannels”. Conference Record of the Thirty-Second Asilomar Conference on Signals, Systems and Computers, 1998, vol. 2, pp. 1124-1128, Nov. 1-4, 1998.
Witschnig, et al. “A Different Look on Cyclic Prefix for SC/FDE”. The 13thIEEE International Symposium on Personal, Indoor, and Mobile Radio Communications, 2002, vol. 2. pp. 824-828. Sep. 15-18, 2002.

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