The Direction of Arrival Estimation Method in Hybrid Analog-digital System with One-bit ADC

The emerging hybrid analog-digital system has drawn significant attention for its potential use in future millimeter-wave communications. In this paper, the problem of direction of arrival (DOA) estimation in hybrid analog-digital system with one-bit analog-digital converter (ADC) is considered. By virtue of arcsine law, it is shown that the autocorrelation function (ACF) of the array signal can be approximated reconstructed by the one-bit signal. With the obtained ACF of the array signal, the eigen-decomposition is implemented and the signal subspace and noise subspace can be extracted to realize DOA estimation. Simulation experiments verify the performance of the proposed DOA estimation method in hybrid analog-digital system with one-bit ADC. It is found in this paper that using the one-bit ADC in hybrid analog-digital system can attain good DOA estimation performance with reducing power consumption and hardware cost.