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本文分析了加性白高斯噪声(AWGN)信道中改进的帧同步捕获方案的性能,并通过数值计算和计算机模拟,与一般的二进对称信道(BSC)的相关帧同步捕获方案和AWGN信道中的相干帧同步捕获方案进行了比较。结果表明改进方案的首次捕获概率性能优于其他两种方案。如若要求首次捕获概率大于0.95,采用长度为17的最佳帧同步码,改进方案在信噪比要求上比BSC的相关方案好2.5dB,比AWGN信道中的相干方案好6.7dB。文中还给出了计算机模拟和搜索最佳帧同步码的程序框图,给出了部分最佳帧同步码,可用于各种实际情况而能得到良好性能。
This paper analyzes the performance of the improved frame synchronization acquisition scheme in additive white Gaussian noise (AWGN) channel. Through the numerical and computer simulation, it compares with the common frame synchronization acquisition scheme of binary symmetric channel (BSC) and AWGN channel The coherent frame synchronization acquisition scheme was compared. The results show that the first-acquisition probability of the improved scheme is better than the other two schemes. If the first acquisition probability is greater than 0.95 and the best frame synchronization code with length 17 is adopted, the improvement scheme is 2.5dB better than the BSC correlation scheme in signal-to-noise ratio and 6.7dB better than the coherent scheme in AWGN channel. Also given in the paper computer simulation and search the best frame synchronization code block diagram, given some of the best frame synchronization code can be used for a variety of practical situations and get good performance.