Blind detection of BPSK signals in a multi-user environment

Details Blind detection of BPSK signals in a multi-user environment Blind detection of BPSK signals in a multi-user environment

2003-05-23

2009-12-29

Ghayour, Mohammad H (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S140000, C375S147000, C375S148000, C375S340000, C375S349000

Reexamination Certificate

active

07639758

ABSTRACT:
The present invention relates to a system and method for the blind detection of BPSK signals in a multi-user environment. More particularly, the present invention provides a system and a method for blind detection of BPSK signals in an environment with multiple simultaneous transmitters. The received signal is a composite signal consisting of several delayed phase shifted and attenuated versions of the desired signal with other such signals from other transmitters. The present invention also provides a system for blind (without using training sequences) detection of BPSK signals in a multi-user environment. In particular, the system of the invention is of utility in the CDMA environment.

REFERENCES:
patent: 7088671 (2006-08-01), Monsen
Shankar Prakriya et al (hereinafter Shankar) “Blind Space-Time Constrained Minimum Variance Detection of DS/CDMA Signals” IEEE Apr. 28-May 2, 2002.
Al-Bayati, et al. “Block Phase-Precording for Blind Multiuser Detection of BPSK/DS-CDMA Signals”IEEE International Conference on Personal Wireless Communications(2002) pp. 250-254.
Al-Bayati, et al. “Block Modulus Precoding for Blind Multiuser Detection of DS-CDMA Signals”IEEE Transactions on Communications(2003) vol. 51, No. 1, pp. 52-56.
Al-Bayati, et al. “Block Spectral Precoding for Blind Multuser Detection of DS/CDMA Signals” IEEE International Conference on Personal Wireless Communications (2002) pp. 238-242.
Sripimanwat, K., et al. “Improved Performance Analysis of Spiral Curve-Phase Precoding”Electronics Letters(2000) vol. 36, No. 8, pp. 729-730.
Chan, Y., et al. “Channel Precoding for Indoor Radio Communications Using Dimension Partitioning”IEEE Transactions on Vehicular Technology(1999) vol. 48, No. 1, pp. 98-114.
Zhuang, W., et al. “Nonlinear Phase Precoding for Personal Communications”Electronics Letters(1994) vol. 30, No. 24, pp. 2010-2011.

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