基于PSP均衡技术的CPM检测算法

针对时变频率选择性衰落信道，研究了连续相位调制（CPM）信号的逐幸存检测算法。该算法在未知信道状态的条件下，利用训练序列对信道参数进行初始估计。在对CPM信号进行Viterbi解调过程中，采用PSP技术实现信道的无延时跟踪。基于频域均衡的CPM检测算法虽然可以有效抗多径干扰且计算复杂度较低，但不能对时变信道进行跟踪。仿真结果表明，在时变多径信道下，基于PSP均衡的CPM检测算法能有效地进行信道参数估计，比频域均衡算法具有更好的误码性能。

CPM Detection Algorithm based on PSP Equaliation

A detection algorithm based on PSP（ per-survivor processing） equalization for continuous phase modulation over time-varying frequency-selective fading channels is proposed. In the proposed receiver, initial channel impulse （CIR） is estimated with a training sequence. PSP provides a general framework for the detection of CPM signal whenever the presence of unknown parameters prevents the precise use of classical Viterbi algorithm. FDE has a very wide range of application because it provides a solution to multipath interference with low complexity. However the algorithm couldn＇ t be used in tracking time-varying channels. It is found that the bit-error-rate performance of PSP decoder without channel state information （CSI） is better than that of the frequency domain equalization algorithm in muhipath fading channels.