位同步是数字通信中最基本和最重要的环节。DMR标准建议的位同步算法在弱信号情况下的同步能力不够强,失步、重新建立同步都会中断通信,最坏情况下会导致通信失败。针对这一情况,提出了一种新的改进同步算法,并对其在弱信号环境的性能进行了仿真测试,获得了显著的改善效果。 Bit synchronization is the most basic and important part of digital communications. The bit synchronization algorithm proposed by the DMR standard is not strong enough to synchronize in the case of weak signals. If the synchronization is lost or re-established, the communication will be interrupted, and in the worst case, the communication will fail. Aiming at this situation, a new improved synchronization algorithm is proposed, and its performance in weak signal environment is simulated and tested, and the remarkable improvement effect is obtained.