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| 1 | 采用向量内积的并行相关算法显示文摘针对软件接收机相关器计算的实时性问题,通过分析扩频信号的接收过程,建立一种基于向量内积的并行相关信号接收模型。利用图形处理单元中大量的浮点运算单元进行矩阵与向量运算,并行计算各通道相关值,提高了信号相关运算的实时性。仿真验证结果表明,利用基于GPU的向量内积软件并行相关算法计算25 MHz采样率时长1 ms的信号相关值,25个通道共150个相关运算耗时967μs,与CPU上基于数学核心函数库的实现相比速度约提高了61.4倍,能够实现宽带扩频信号软件实时相关接收。 | 牟卫华 倪少杰 白洋 孙广富 欧钢 | 2017 | 国防科技大学学报2017，39，5： | 2 |
| 2 | Design of 1.5 bit quantization correlator in satellite navigation software receiver显示文摘Currently, 1 bit or 2 bit signal quantization is widely used in satellite navigation software receivers. The bit-wise parallel algorithm has been proposed for 1 bit and 2 bit signal quantization, which performs correlation with high efficiency. In order to improve the performance of the correlator, this paper proposes a new 1.5 bit quantization method. Theoretical analyses are made from the aspects of complexity and quantization loss, and performance comparison between 1.5 bit quantization correlator and traditional correlators is discussed. The results show that the 1.5 bit quantization algorithm can save about 30 percent complexity under similar quantization loss, reduce more than 0.5 d B signal noise ratio(SNR) loss under similar complexity. It shows great performance improvement for correlators of satellite navigation software receivers. | Hongwei Zhou Tian Jin Fangyao Lü | 2016 | Journal of Systems Engineering and Electronics2016，27，2： | 0 |
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