Fractionally spaced cross-polarization interference canceller

Details Fractionally spaced cross-polarization interference canceller Fractionally spaced cross-polarization interference canceller

1992-07-07

1995-04-11

Chin, Stephen

Pulse or digital communications

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375 99, 342361, 455295, H04B 110, H01Q 2106, H01Q 2124

Patent

active

054065895

ABSTRACT:
A fractionally spaced cross-polarization interference canceller, wherein a compensation signal is generated through an adaptive filter operating in a frequency that is an integer multiple of a transmission data frequency. The cross-polarization interference canceller includes a mechanism for generating an error signal used to control coefficients of the adaptive filter in the integer multiple frequency. The mechanism is realized, for example, by using a waveform generator generating an estimate of a baseband signal in the integer multiple frequency using a plurality of estimates of transmission data and coefficients determined by an impulse response of a transmission path.

REFERENCES:
patent: 4550415 (1985-10-01), Debus, Jr. et al.
patent: 4910468 (1990-03-01), Ohtsuka et al.
patent: 4914676 (1990-04-01), Iwamatsu et al.
patent: 5023620 (1991-06-01), Matsuura
patent: 5068667 (1991-11-01), Mizoguchi
patent: 5241320 (1993-08-01), Mizoguchi
Siller, Jr., et al., "Decision-Directed Fractionally Spaced Equalizer Control Using Time-Domain Interpolation," IEEE Transactions on Communications, vol. 39, No. 2, Feb. 1991, pp. 182-186.
B. Lankl et al, "Cross-Polarization Interference Cancellation in the Presence of Delay Effects," International Conference on Communication (ICC), 1988, pp. 1355-1361.

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