Method and apparatus for decision directed demodulation using an

Details Method and apparatus for decision directed demodulation using an Method and apparatus for decision directed demodulation using an

1996-10-11

1999-06-01

Ghebretinsae, Temesghen

Pulse or digital communications

Receivers

Angle modulation

375326, H04L 2714

Patent

active

059094702

ABSTRACT:
A method and apparatus for generating a reference signal for use in an alternating projection loop which is part of demodulation in a base station of a wireless communication system, the reference signal relaxed to minimize the effects of frequency offset and amplitude variations, the base station including an array of antennas. The alternating projection loop demodulates in the presence of co-channel interference and includes correction for time alignment and/or frequency offset.

REFERENCES:
patent: 5592490 (1997-01-01), Barratt et al.
A. van der Veen and A. Paulraj, "A constant modulus factorization techique for smart antenna applications in mobile communications," in Proc. SPIE, "Advances Signal Processing Algorithms, Architectures, and Implementations V" (F. Luk, ed.), vol. 2296, (San Diego, CA), pp. 230-241, Jul. 1994.
S. Talwar and A. Paulraj, "Recursive algorithms for estimating multiple co-channel digital signals received at ana antenna array," in Proc. Fifth Annual IEEE Dual Use Technologies and Applications Conference, May 1995.
S. Talwar, M. Viberg and A. Paulraj, "Blind estimation of multiple co-channel digital signals arriving at an antenna array," in Proc. 27th Asilomar Conference on Signals, Systemsf and Computers, vol. I, pp. 349-342, 1993.
A. L. Swindlehurst, S. Daas and J.Yang, "Analysis of a decision directed beamformer," IEEE Transactions on Signal Processing, vol. 43, No. 12, pp. 2920-2927, Dec. 1995.

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