Theoretical Analysis of BER Performance Bounds of Trellis-Coded Co-channel Interference Canceller

概要

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Co-channel interference is a major deteriorating factor limiting the capacity of mobile communication systems. To mitigate the effect of the interference, a kind of nonlinear interference canceller named trellis-coded co-channel interference canceller(TCC)has been proposed. In TCC the trellis-coded modulation(TCM)is introduced to both the desired signal and the interference signal in order to enhance the cancelling performance. In this paper, the bit error rate(BER)performance of TCC in static channel is theoretically evaluated for the first time. An equivalent TCM(E-TCM)model is firstly established, and a BER asymptotic estimate(AE)and a BER upper bound(UB)of TCC are then evaluated respectively by analyzing E-TCM. In the evaluation of AE, the BER performance is calculated as a function of phase difference between the desired signal and the interference signal(φ), subsequently the average BER performance over φ can be evaluated. The UB of BER is calculated using a transfer function based on the matrix representation. This paper also demonstrates that AE gives higher accuracy and less calculation complexity than UB. Performance comparisons reveal the consistency of these theoretical results with that of computer simulations.
社団法人電子情報通信学会の論文
1998-04-25