Digital communications receiver for dual input signal
Interference cancellation method and apparatus
Crosstalk reduction in unbalanced QPSK detectors
Echo canceller for bidirectional digital transmission
Frequency demodulator having circuit cancelling undesired signal components Patent #: 4908581
ApplicationNo. 348442 filed on 05/08/1989
US Classes:370/201, CROSSTALK SUPPRESSION327/100, SIGNAL CONVERTING, SHAPING, OR GENERATING370/286, Echo suppression or cancellation375/349, Plural signal paths in receiver379/417, Anticrosstalk455/295Modulation distortion or cross talk correction or elimination
ExaminersPrimary: Olms, Douglas W.
Assistant: Jung, Min
Attorney, Agent or Firm
International ClassH04B 003/14
AbstractA receiver includes an interference canceller circuit which receives a corrupted signal and makes an estimate of the desired signal. Subsequently, an estimate of the interference signal is determined by subtracting the estimated desired signal from a delayed version of the received signal. The receiver forms a final estimate of the desired signal by subtracting the estimated interference from a second delayed version of the received signal.