Abstract: A new Direction Of Arrival（DOA） estimation algorithm for single channel array is proposed in this paper. It establishes a new narrowband signal processing model of single channel array via controlling receive channel by radio frequency shift, this model only requires the array outputs to be sampled one at a time by a single receive channel. It gives the posterior parameter function of the DOA. Then combined with Markov Chain Monte Carlo（MCMC） methods, a new perfect sampling method is provided to resolve the maximum a posterior（MAP） function of DOA, and the DOA estimation is realized. Computer simulation verifies that the proposed algorithm has high performance and resolution, compared with the traditional perfect sampling algorithm, this novel algorithm not only keeps the excellent performance of the original MAP algorithm, but also reduces the convergence time.

Key words: single channel sequentially sampling, Bayesian parameter estimation, perfect sampling, Direction Of Arrival（DOA） estimation

摘要： 提出了一种新的基于接收通道轮流采样的阵列单通道波达方向估计算法。该算法通过射频开关控制接收通道轮流对各阵元进行采样建立新的阵列单通道窄带信号频域空间谱估计模型，基于该模型推导了来波方向的后验概率密度函数，结合马尔科夫链蒙特卡洛方法（MCMC），提出一种新的完美抽样策略，实现了波达方向（DOA）的估计。仿真实验结果表明，该方法参数估计性能好，分辨率高，不但保持了原贝叶斯最大后验概率估计方法的优越性能，而且收敛速度更快。

关键词: 单通道轮采, 贝叶斯参数估计, 完美抽样, 波达方向估计