A Receiver Reconfigurable Method for Indoor Human Detection with 60GHz MIMO FMCW Radar

A new receiver (Rx) reconfigurable method is proposed to enhance the target signal. After theoretical derivation and experimental verification, the proposed method solves the problem of poor signal-to-signal ratio (SNR) when using 60GHz MIMO FMCW radar for indoor positioning. The proposed method combines multiple original Rx channel data to form a new data channel, forming a new virtual antenna array. This method improves the SNR of the echo signal without affecting the estimation of the target angle. In the scenarios where the human body is standing or sitting, the SNR is improved by more than 28dB. The new data matrix is used to resolve the angle. Due to the improved target strength, the angle resolution accuracy is also improved compared with the traditional single Rx channel