基于联合空、时频估计的跳频无线网多用户检测算法

Multiuser Detection Algorithm in FH Wireless Networks Based on Joint DOA,Timing and Frequency Estimation

多个跳频网络共存时,多用户由于频率冲突而相互干扰,成为限制跳频网络性能的主要原因。本文基于阵列天线和二维谐波恢复原理,提出一种联合电波到达方向、跳频时间和跳变频率估计的多用户检测算法。仿真实验表明,该算法可以在未知跳频速率、频率偏移以及跳频图案等参数的情况下拆分多个发生频率冲突的跳频信号,避免相互干扰。

Different FH wireless systems sharing the same frequency band and operating in the same environment, the interference for frequency collisions is one of the main performance-limiting challenges. This paper proposes a multi-user detection algorithm for joint direction of arrival （DOA）, hop timing and frequency estimation based on the linear array and two-dimensional harmonic retrieval （2-D HR）. Simulation results show that the method can unravel multiple FH signals in the presence of collisions and unknown hop rates, frequency offsets, and hop patterns.