摘要
测速仪是构建现代智能交通系统的重要组成部分。测速雷达由于频域采样时的频谱泄露,影响和限制了雷达对速度的最小分辨能力。运用相位差法对测速雷达回波信号的频谱进行校正,可以显著提高测速精度。给出了相位差法在DSP器件TMS320F28335上的实现方法,可使雷达响应时间小于10ms,测速精度达到0.1 km/h。
The speedometer is an important part of modern intelligent transportation systems.Speed-measuring radar is unable to achieve high precision with spectrum analysis because of spectral leakage of sampling in frequency domain.Then the spectrum of speed-measuring radar can be corrected by taking advantage of the phase difference of two corresponding peak lines,the accuracy of speed measurement can be improved significantly in this way.Method of phase difference based on DSP TMS320F28335 is also provided which achieves the requirement of the radar system,that response time is less than 10 ms,speed accuracy reaches 0.1 km/h.
出处
《测控技术》
CSCD
北大核心
2014年第5期47-49,共3页
Measurement & Control Technology
