I. Introduction
Time Division Multiple Access (TDMA) is a practical multi-access technology in modern communication systems[1]. In TDMA communication system, each terminal shares the wireless channel resources in the frame - slot mode. A frame is the minimum allocation period, and a time slot is the minimum allocation unit. A frame is divided into multiple time slots, and the duration of each time slot is generally fixed. In a TDMA system, all terminals are synchronized with the system time, the time difference between the signals transmitted by different terminals is an integer multiple of the time slot interval, and only one terminal is allowed to transmit wireless signals in each time slot. Until the end of the wireless communication, the terminal occupies the periodically repeated time slot unit. The terminals of TDMA communication system have high level timing accuracy, so that the time slot of different terminals will not be aliased when wireless transmission