Co-channel interference cancellation for D-AMPS hand set

Co-channel interference is a major impairment for IS-136 handsets. Joint estimation of cochannel signals can be used to minimize this effect, but traditional approaches require transmissions from different base-stations to be synchronized. In this paper, we consider a semi-blind approach for cancelling asynchronous interference using generalized per-survivor processing for channel acquisition and tracking. Signal delays and medium responses are jointly estimated for symbol-asynchronous co-channel signals assuming knowledge of the signal structure. Simulation results are presented that show C/I gains of 15 dB in the presence of one interferer.

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