适用于大容量毫米波通信的低复杂度帧同步方案

A Low-complexity Frame Synchronization Schemefor Large-capacity Millimeter-wave Communication

摘要:

在大容量毫米波通信系统中，超高的传输速率使得硬件单元难以实时地实现帧同步。因此，降低帧同步方法的算法复杂度是实现大容量毫米波通信中实时帧同步的关键。针对大容量毫米波通信场景中传统帧同步方法算法复杂度过高的问题，提出了一种低复杂度的时频联合帧同步方案。该方案通过联合时域的粗同步和频域的精同步简化了帧同步的实现方式，降低了帧同步算法的复杂度，为大容量毫米波系统的实时帧同步提供了一个可行方案。仿真结果表明：所提方案比Park的方法的门限信噪比低7dB，比Meng的方法的门限信噪比高1dB，算法复杂度从Meng的或Park的方法的O(N2)级降低为O(Nlog2N)级。

Abstract:

In the large-capacity millimeter-wave communication system, the ultra-high transmission rate makes it difficult for the hardware unit to achieve frame synchronization in real time. Therefore, reducing the algorithm complexity of the frame synchronization method is the key to real-time frame synchronization in large-capacity millimeter-wave communications. For the problem of high complexity of traditional frame synchronization methods in large-capacity millimeter-wave communication scenarios, a low-complexity time-frequency joint frame synchronization scheme is proposed. This scheme simplifies the realization of frame synchronization by combining coarse synchronization in time domain and fine synchronization in frequency domain, reduces the complexity of frame synchronization algorithm, and provides a feasible scheme for real-time frame synchronization of large-capacity millimeter wave systems. The simulation results show that the proposed scheme is 7dB lower than the threshold SNR of Park's method and 1dB higher than that of Meng's method. The algorithm complexity is reduced from O(N2) level of Meng's or Park's method to O(Nlog2N) level.