Abstract:

To overcome the high computational complexity problem of per-survivor-processing（PSP） algorithm in maximum likelihood sequence detection(MLSD) method and the real time channel tracking problem for fast Rayleigh fading channel, a reduced-state sequence estimation (RSSE) with per-survivor processing for Viterbi algorithm and reduced complexity Kalman channel tracking technique is studied in maximum likelihood sequence detection receiver. Computer simulation results show that the computational complexity of this simplified Kalman-RSSE-PSP Maximum likelihood sequence detection receiver is less than recursive least square (RLS) -RSSE-PSP MLSD receiver, meanwhile its bit error rate performance is lower than RLS-RSSE-PSP MLSD receiver.

Key words: reduced-state sequence estimation, Viterbi algorithm, Kalman channel tracking, maximum likelihood sequence detection