微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2011年
22期
28-31,34
,共5页
DSP%FPGA%GPS实时接收机
DSP%FPGA%GPS實時接收機
DSP%FPGA%GPS실시접수궤
DSP%FPGA%GPS real-time receiver
基于TI公司的TMS320C6416 DSP和Xilinx公司的Virtex4-XC4VLX60FPGA，提出了一种实时GPS接收机的架构。针对捕获结果与跟踪时间不同处理数据不同步问题，提出了既节省空间又能满足跟踪实时性要求的码相位预测方案；在卫星分配跟踪通道问题上，提出了优先考虑星历收齐的星的分配原则。在此基础上再考虑信号相关峰值大的星；最后针对定点型DSP浮点运算慢的问题，给出了一些优化方案。以文中方案研制出的接收机在满足实时性要求下能够正确定位，并具有算法和软件升级容易的特点.
基于TI公司的TMS320C6416 DSP和Xilinx公司的Virtex4-XC4VLX60FPGA，提齣瞭一種實時GPS接收機的架構。針對捕穫結果與跟蹤時間不同處理數據不同步問題，提齣瞭既節省空間又能滿足跟蹤實時性要求的碼相位預測方案；在衛星分配跟蹤通道問題上，提齣瞭優先攷慮星歷收齊的星的分配原則。在此基礎上再攷慮信號相關峰值大的星；最後針對定點型DSP浮點運算慢的問題，給齣瞭一些優化方案。以文中方案研製齣的接收機在滿足實時性要求下能夠正確定位，併具有算法和軟件升級容易的特點.
기우TI공사적TMS320C6416 DSP화Xilinx공사적Virtex4-XC4VLX60FPGA，제출료일충실시GPS접수궤적가구。침대포획결과여근종시간불동처리수거불동보문제，제출료기절성공간우능만족근종실시성요구적마상위예측방안；재위성분배근종통도문제상，제출료우선고필성력수제적성적분배원칙。재차기출상재고필신호상관봉치대적성；최후침대정점형DSP부점운산만적문제，급출료일사우화방안。이문중방안연제출적접수궤재만족실시성요구하능구정학정위，병구유산법화연건승급용역적특점.
A real-time GPS receiver prototype is proposed and realized. Solution in this paper provides several feasible and suitable methods in the implementation of real-time GPS receiver, including the code phase estimation method for eliminaling the asynchrony between the acquisition results and the tracking data, along with the satellite/channel allocation algorithm in which the priority calculation is based on both the integrity of the ephemeris and the correlation peak of the signals. Floating point calculation by fixed-point DSP is also optimized. Lastly, a friendly interface is provided, for updating algorithms and support software, making our prototype an ideal platform for algorithms development, verification and evaluation of embedded GPS receivers.
