Robust multicode detector for HSDPA

Details Robust multicode detector for HSDPA Robust multicode detector for HSDPA

2011-01-18

2011-01-18

Pathak, Sudhanshu C (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S150000, C375S260000, C375S267000, C375S368000, C370S335000

Reexamination Certificate

active

07873098

ABSTRACT:
Detecting a symbol of interest comprises despreading a received signal to obtain despread values corresponding to the symbol of interest and to one or more interfering symbols, combining the despread values to generate combined values for the symbol of interest and the interfering symbols, computing spreading waveform correlations between the spreading waveform for the symbol of interest and the spreading waveforms for the interfering symbols, computing interference rejection terms representing the interference present in the combined value for the symbol of interest attributable to the interfering symbols based on the spreading waveform correlations, and generating an estimate of the symbol of interest by combining the combined values with the interference rejection terms. The interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating the estimates for noise. This provides a robust interference model that avoids numerical problems associated with conventional joint detection.

REFERENCES:
patent: 6724809 (2004-04-01), Reznik
patent: 6816541 (2004-11-01), Schmidl
patent: 7492809 (2009-02-01), Wang et al.
patent: 2002/0051433 (2002-05-01), Affes et al.
patent: 2006/0280273 (2006-12-01), Mueller-Weinfurtner
patent: 2008/0267261 (2008-10-01), Wang et al.
patent: 2008/0267265 (2008-10-01), Cairns et al.
S. Verdu; Multiuser Detection: Cambridge University Press; Sec. 6.2, 6.4 and 7.3; 1998; pp. 291-298, 306-314 & 361-369.
Kim et al.; Linear MMSE Space-Time Equalizer for MIMO Multicode CDMA Systems; IEEE Transcations on Communications; Oct. 2006; pp. 1710-1714.
Verdu, S. Multiuser Detection, Cambridge, UK: Cambridge University Press, 1998.
Hansen, H. et al. “High Capacity Downlink Transmission with MIMO Interference Subspace Rejection in Multicellular CDMA Networks.” EURASIP Journal on Applied Signal Processing, vol. 5, pp. 707-726, 2004.
Co-pending U.S. Appl. No. 11/566,756, filed Dec. 5, 2006.
Co-pending U.S. Appl. No. 11/739,924, filed Apr. 25, 2007.
Co-pending U.S. Appl. No. 11/935,840, filed Nov. 7, 2007.

Affiliated with

Also associated with

Rating

Robust multicode detector for HSDPA does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Robust multicode detector for HSDPA, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Robust multicode detector for HSDPA will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2741067