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针对迭代消息传递的伪码捕获算法复杂度过高的问题,提出一种低复杂度伪码迭代捕获方法.将伪码迭代捕获方法分成迭代译码算法和向量选择算法2个步骤来讨论:首先,采用归一化简化方法对迭代译码算法进行改进,降低了算法的空间复杂度;其次,提出一种新的伪码向量选择算法,大大降低了算法的时间和空间复杂度.仿真结果显示:提出的伪码迭代捕获算法以低的复杂度,实现了较低信噪比下长伪码的快速捕获,且其捕获性能优于现有的伪码迭代捕获方法.
Aiming at the problem of high complexity of the pseudo-code acquisition algorithm for iterative message passing, a low-complexity iterative acquisition method for pseudo-code is proposed. The iterative decoding of pseudo-code is divided into two steps: iterative decoding algorithm and vector selection algorithm. Firstly, , The normalized simplified method is used to improve the iterative decoding algorithm, which reduces the space complexity of the algorithm. Secondly, a new pseudo-code vector selection algorithm is proposed, which greatly reduces the time and space complexity of the algorithm. The simulation results show : The proposed pseudo-code iterative acquisition algorithm with low complexity, to achieve a low signal-to-noise ratio fast acquisition of long pseudo-code, and its capture performance is superior to the existing pseudo-code iterative capture method.