Abstract
Coprime array can provide high degrees of freedom by using difference–sum co-array under the same physical sensors, and can estimate the source under uncertain conditions. A special coprime array structure is proposed in this paper. Its difference–sum co-array can improve the degrees of freedom. Finally, the proposed array structure estimation is used for direction-of-arrival. Simulation results and analysis show that the proposed array structure can effectively improve the accuracy of direction-of-arrival estimation. Under the same signal-to-noise ratio and snapshot number, it has lower root mean square error and higher estimation accuracy than other methods.
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