WU Qiong, LI Zhaozhan, LIN Yanhong, et al. DOA estimation algorithm based on 2q th level nested MIMO array under Gaussian colored noise[J]. 2021, (7): 134-137+141.
WU Qiong, LI Zhaozhan, LIN Yanhong, et al. DOA estimation algorithm based on 2q th level nested MIMO array under Gaussian colored noise[J]. 2021, (7): 134-137+141. DOI: 10.13873/J.1000-9787(2021)07-0134-04.
This algorithm firstly combines the 2qth level nested array with multi-input multi-output(MIMO)system to realize the joint optimization of sensors in transmitting and receiving array.Then by computing the 2qth order cumulant matrix and vectorization
a virtual 2qth“sum-difference co-array”can be obtained
and the effective degree of freedom(DOF)is expanded while the influence of Gaussian colored noise is suppressed.At last
based on the vectorized data
the spatial smoothing MUSIC algorithm is adopted to realize the direction of arrival(DOA)estimation.The simulation results indicate that compared with the classical 2qth order MUSIC algorithm and the DOA estimation algorithm based on 2qth level nested array
the DOA estimation algorithm based on the 2qth level nested MIMO array has higher precision and resolution ability under Gaussian colored noise.