摘要
相对于硬件接收机,GPS软件接收机具有很强的灵活性,适合对GPS的各种算法进行研究。软件接收机要达到实时性能,则必须具有较少的数据计算量或者较高的数据处理效率,本文采用了基于SIMD指令来提高数据处理速度,基带混合和PRN码相关采用SIMD指令加速,可以满足在5.714MHz采样率下12通道实时处理,单点定位的位置和速度精度分别达到米级和分米级。
GPS software receiver is more flexible than hardware receiver and suits different arithmetic for research. Given the demanding computational requirements of software based GPS receivers, there are two basic approached to accomplish this： reducing the number of computations required or improving the efficiency with which the computations are carried out. In this paper, SIMD technology is used to perform base-band mixing and PRN code correlations. The software receiver can track 12 channels under 5. 714 MHz sampling rate in real time. The single point position and velocity accuracies are at the meter and decimeter.
出处
《电子测量技术》
2010年第1期82-85,共4页
Electronic Measurement Technology
