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首页> 外文会议>International conference on advances in computing, communications and informatics >Frequency estimator to improve short range accuracy in FMCW radar
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Frequency estimator to improve short range accuracy in FMCW radar

机译：频率估计器提高FMCW雷达的短程精度

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摘要

Frequency Modulated Continuous Wave (FMCW) radars have been widely used for short and medium range detection. Applications of FMCW radar, where measuring short distances is critical, need to have a high accuracy. In the FMCW radar systems, the received signal is a delayed version of the transmitted signal. The range is calculated by measuring the beat frequency of the received signal. The range resolution of radar is inversely proportional to the transmitting bandwidth of the radar. In order to achieve a better range resolution we need to increase the bandwidth, which has its own limitations. To increase the bin resolution of FFT of the beat signal, the sampling frequency must be increased which increases the system complexity. A frequency estimator is implemented to enhance the accuracy of short range detection in FMCW radar without increasing the bandwidth or sampling frequency of the system. It compensates the error by calculating an offset value to provide fine beat frequency.
机译：频率调制的连续波（FMCW）雷达已广泛用于短且中等范围检测。 FMCW雷达的应用，其中测量短距离至关重要，需要具有高精度。在FMCW雷达系统中，接收信号是发送信号的延迟版本。通过测量接收信号的节拍频率来计算该范围。雷达的范围分辨率与雷达的发射带宽成反比。为了实现更好的范围分辨率，我们需要增加带宽，这具有自身的限制。为了增加拍信号的FFT的箱分辨率，必须增加采样频率，从而提高了系统复杂性。实现频率估计器以增强FMCW雷达中短程检测的精度，而不会增加系统的带宽或采样频率。它通过计算偏移值来补偿误差以提供细拍频率。

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