一种TDCS自适应粒子群导频优化设计算法

为了解决变换域通信系统(transform domain communication system,TDCS)基函数存在不可用频带而产生的导频优化设计问题,提高TDCS的信道估计精度,提出了基于自适应粒子群算法的TDCS导频优化设计.构建TDCS信道估计模型,分析不可用频带对信道估计性能的影响并建立导频优化模型,设计导...

An adaptive particle swarm pilot optimization design algorithm for TDCS

In order to solve the pilot optimization problem caused by the unavailable frequency bands in the basic function of the transform domain communication system, and improve the channel estimation accuracy of TDCS, we propose a pilot optimization design of TDCS based on adaptive particle swarm optimization algorithm. Firstly, the TDCS channel estimation model is constructed, the influence of unavailable frequency bands on channel estimation performance is analyzed and the pilot optimization model is established. Secondly, the fitness function and the adaptive inertia weight of pilot optimization are designed. At last, the position and power of pilot are optimized by particle swarm optimization. The simulation results in different interference environments show that the new algorithm converges faster and has stronger optimization ability than the traditional particle swarm optimization, its channel estimation accuracy and BER performance are close to the optimal pilot. Compared with the equal-interval and equal-power pilot, the BER has a performance gain of 2.6 dB and 2.2 dB in the single interference and multiple interference bands.