DIRECT POSITION DETERMINATION WITH ONE-BIT SIGNAL FOR MULTIPLE TARGETS

In this paper, we address the problem of direct position determination (DPD) for multiple targets in bandwidth/power-constrained subarray systems. In this case, infinite-bit signals cannot be transmitted to a fusion center (FC) due to the stringent bandwidth/power budgets. To solve this problem, we propose a DPD method with multiple signal classification (MUSIC) based on one-bit signals (called 1-bit DPD-MUSIC), which can detect and locate the multiple targets simultaneously. Specifically, under low and medium signal-to-noise ratios (SNRs), the one-bit signal can be approximated by a scaled infinite-bit signal with a quantization error that is independent with the infinite-bit signal. Thus, the MUSIC algorithm can be straightforwardly applied without extra pre-processing. In addition, we consider the position spectrum derived from the 1-bit DPD-MUSIC algorithm as the statistic test to obtain the detection threshold. Simulations demonstrate that the 1-bit DPD-MUSIC saves large bandwidth and power with a slight loss of performance.