为提高紫外激光通信系统中的编码效率和频带利用率，提出采用PPM（pulse position modulation）调制和Turbo编码相结合的技术来提高效率。此方法不仅能提高频带的利用率，也能提高码间抗干扰能力、纠错能力和降低误码率，并对PPM调制模式下的Turbo码译码公式进行了推导，最后利用Matlab软件实现了该技术的仿真，仿真结果表明：在紫外激光通信中采用PPM和Turbo统一调制编码的技术能进一步降低系统的效率和误码率。

In order to improve the coding efficiency and the availability of frequency band in ultraviolet laser communication system, a technique is put forward, which integrates PPM（pulse position modulation）and Turbo code. This technique can improve the availability of frequency band, anti-jamming capability between codes, error correction and error bit rate. The coding formula of Turbo code is derived in PPM mode. The technique was simulated with Matlab software. The simulation result shows that this solution can reduce the bit error rate and improve the efficiency of the whole communication system.