Time-varying Channel Estimation Based on Particl Swarm Optimized Particle Filter

A time-varying channel estimation method based on the particle swarm optimized particle filter is proposed to response the limited frequency band and the degeneration in particle Filter. A coarse channel state information is given through out the particle filter, a accurate channel state information is given by particle swarm optimization coarse channel state information, to avoid algorithm fast convergence and maintain the particle diversity a proportional fairness resample is used in proposed method. Theoretical analysis and simulations show that the proposed method performance is nearly optimal compared with conventional channel estimation method.