关键词: 选择式Rake, 密集多径信道, 超宽带

Abstract: The path selection issue for S-Rake (selective Rake) in quasi-static dense multipath channels with inter-path interference is investigated. The bit error probability is taken as the objective cost function. After some theoretic derivation, the path selection issue is converted into a constrained optimization problem conditioned on the number of path employed in S-Rake. The optimal path selection criterion is presented and a suboptimal algorithm is proposed. The numerical simulations indicate that, in quasi-static dense multi-path channels with inter-path interference, the proposed path selection algorithm outperforms the conventional algorithm based on instantaneous signal to noise ratio ordering.

Key words: selective Rake, dense multipath channel, ultra-wideband