Multi-user detection method

Details Multi-user detection method Multi-user detection method

2006-07-18

2006-07-18

Corrielus, Jean B. (Department: 2637)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S285000, C455S296000

Reexamination Certificate

active

07079607

ABSTRACT:
A multi-user detection method eliminating interference between users transmitting modulated data of symbols on a transmission channel, each transmission channel including at least one propagation path arriving at an array of reception antennas in a direction of arrival. Each user (a) estimates the signal transmitted by the user from the antenna signals, effecting estimation of the direction of arrival and characteristics of propagation of each path of the transmission channel from the signals; (b) estimates the data transmitted by the user from the estimation of the signal transmitted; (c) estimates the contribution of the user to the signals received by the different antennas from the estimated data and the estimated direction of arrival and propagation characteristics; and (d) subtracts from the antenna signals the contribution estimated at (c) to obtain cleaned antenna signals, supplied by at least a first sequence, used as antenna signals by at least a second sequence.

REFERENCES:
patent: 0 978 951 (2000-02-01), None
M. C. Reed, et al., IEEE Journal on Selected Areas in Communications, vol. 17, No. 12, XP-000920304, pp. 2082-2089, “Iterative Multiuser Detection Using Antenna Arrays and FEC on Multipath Channels”, Dec. 1999.
S. Moshavi, IEEE Communications Magazine, vol. 34, No. 10, XP-000694489, pp. 124-136, “Multi-User Detection for DS-CDMA Communications”, Oct. 1, 1996.
B. H. Khalaj, IEEE International Conference on Communications (CAT. No. 95CH35749), vol. 3, XP-002168234, pp. 1520-1524, “Spatio-Temporal Channel Estimation Techniques for Multiple Access Spread Spectrum Systems with Antenna Arrays”, 1995.

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