一种基于阵列单通道的DOA估计新方法

为克服阵列多通道系统硬件量大,造价高及通道间存在不一致时性能恶化等不足,提出了一种新的基于阵列单通道的DOA估计方法。首先,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空间谱估计模型,接着基于该模型推导了来波方向的后验概率密度函数,然后结合马尔科夫链蒙特卡洛方法(MCMC),实现了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,能够处理相干信号。

A New DOA Estimation Approach Based on Single Channel Array

A new direction of arrival （DOA） estimation algorithm for single channel array is proposed to overcome the shortcomings of multiple channel system, such as too complex and high cost hard- ware, performance change for the worse due to the inconsistency among multiple channels. Firstly, 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. Next it gives the posterior parameter function of the DOA. Then combined with Markov Chain Monte Carlo（MCMC） methods, the DOA estimation is realized. Computer simulation verifies that the proposed algorithm is applicable to correlated and incorrelated signals, and has high performance and resolution.