Hardware implementation of trellis-coded co-channel interference canceller for microcelluar radio

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In order to realize high speed transmission in digital mobile communications, the design trials of equalizers and co-channel interference cancellers are being investigated actively. Nonlinear co-channel interference canceller which uses path diversity has been proved to be an effective method against multipath propagation causing frequency selective fading in high speed transmission. The trellis-coded co-channel interference canceller (TCC) is well-known to yield a superior path diversity effect and co-channel interference cancelling capability, but the computational complexity increases rapidly when the multipath delay becomes large. In this research, by reducing the computational bits in the circuit, and simplifying the calculation complexity without sacrificing the performance, we successfully designed a small-scale, high speed adaptive TCC.This TCC is realized on a FPGA circuit. Its operation and processing speed have been confirmed to be consistent with the design goal.