CDMA时分模式下的统计贝叶斯信道估计

摘要

分析了CDMA时分模式下的统计贝叶斯信道估计.通过理论分析得到了简化的贝叶斯信道估计权值,其等同将后向概率的最大化.提出了一种综合贝叶斯估计和门限的改进方法.计算机仿真结果表明不仅提高了信道估计精度,而且保持了较低的计算复杂度.%The statistical Bayesian channel estimation was investigated in the CDMA TDD mode. The Bayesian estimation is derived through statistical analysis and it is shown to be equivalent to the maximization of the a Posteriori Probability. A modified approach to combine the Bayesian estimation and the hard gating is proposed. Simulation results demonstrate that it improves the estimation accuracy and keeps low computational complexity.