Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-05-15
2007-05-15
Kim, Kevin (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S229000
Reexamination Certificate
active
09903175
ABSTRACT:
The invention provides a method and system for transmission and frequency domain equalization for wideband CDMA communications by providing at least one spread sequence portion, and inserting a cyclic redundancy to the spread sequence to form a transmitted baseband sequence. The invention further provides a method and system for converting a plurality of receive samples from at least one spread sequence portion into a plurality of frequency domain samples, determining a plurality of frequency domain equalization weights for the frequency domain samples, and determining a time domain signal estimate based on the frequency domain equalization weights and frequency domain samples.
REFERENCES:
patent: 5692006 (1997-11-01), Ross
patent: 5719899 (1998-02-01), Thielecke et al.
patent: 5960032 (1999-09-01), Letaief et al.
patent: 6202178 (2001-03-01), Spruyt
patent: 6279022 (2001-08-01), Miao et al.
patent: 6373861 (2002-04-01), Lee
patent: 6449246 (2002-09-01), Barton et al.
patent: 6654431 (2003-11-01), Barton et al.
patent: 6826240 (2004-11-01), Thomas et al.
patent: 6829296 (2004-12-01), Troulis et al.
patent: 7031371 (2006-04-01), Lakkis
patent: 7082174 (2006-07-01), Smee et al.
Chen, Kwang-Cheng and Wu, Shan-Tsung, “A Programmable Architecture for OFDM-CDMA”, IEEE Communications Magazine, vol. 37, Issue 11, Nov. 1999, pp. 76-82.
Prasad, R. and Hara, S., “An Overview of Multicarrier CDMA,” Spread Spectrum Techniques and Applications Proceeding, 1996, IEEE 4th Symposium on, vol. 1, Sep. 22-25, 1996, pp. 107-114.
Xing, H. and Renfors, M., “The Performance Evaluation of Multi-Carrier CDMA System with Frequency Domain Equalization,” Vehicular Technology Conference, 1999, IEEE VTS 50th, vol. 4, Sep. 19-22, 1999, pp. 2362-2366.
C.D. Frank and E. Visotsky; “Adaptive Interference Suppression for Direct-Sequence CDMA Systems with Long Spreading Codes”, Proc. 36thAnnual Allerton Conference on Communication, Control and Computing, Monticello, II, Sep. 1998.
M.V. Clark, “Adaptive Frequency-Domain Equalization and Diversity Combining for Broadband Wireless Communications”, IEEE Journal on Selected Areas in Communications, vol. 16, No. 8, Oct. 1998, pp. 1385-1395.
Baum Kevin
Thomas Timothy A
Vook Frederick W
Kim Kevin
Motorola Inc.
LandOfFree
Method and system for transmission and frequency domain... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for transmission and frequency domain..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for transmission and frequency domain... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3750536