MIMO sensor, method for determining direction-of-arrival approximation degree, and target information matching method

A MIMO sensor, comprising:

• a plurality of transceiver channels, configured to receive multi-channel echo signals, wherein the multi-channel echo signals include successive frames;
• and
• a processor coupled to the plurality of transceiver channels and configured to:
• process the multi-channel echo signals to obtain receiving vectors of a first target and a second target respectively;
• calculate a correlation coefficient between the receiving vectors of the first target and the second targe;
• and
• determine a direction-of-arrival approximation degree between the first target and the second target according to the correlation coefficient;
• determining, by the processor, that the first target and the second target match the same actual object in response to the correlation coefficient being greater than a predetermined value;
• and
• determining, by the processor, that the first target and the second target do not match the same actual object in response to the correlation coefficient being less than or equal to the predetermined value, and performing traversal on a plurality of targets detected in the successive frames to obtain two targets that match the same actual object;
• wherein the receiving vectors are obtained from multi-channel range-Doppler two-dimensional complex data corresponding to the first target and the second target, and the correlation coefficient is calculated by a conjugate correlation processing between the receiving vectors.

A method for target information matching at a Multiple Input Multiple Output (MIMO) sensor, comprising:

• receiving multi-channel echo signals via a plurality of transceiver channels of the MIMO sensor;
• processing, by a processor of the MIMO sensor, the multi-channel echo signals to obtain receiving vectors of a first target and a second target respectively, wherein the processor is coupled to the plurality of transceiver channels;
• calculating, by the processor, a correlation coefficient between the receiving vectors of the first target and the second target;
• determining, by the processor, a direction-of-arrival approximation degree between the first target and the second target according to the correlation coefficient;
• wherein the multi-channel echo signals include successive frames and the first target and the second target are detected from adjacent frames of the successive frames, and the method further comprises:
• determining, by the processor, whether the first target and the second target match a same actual object based on the correlation coefficient;
• determining, by the processor, that the first target and the second target match the same actual object in response to the correlation coefficient being greater than a predetermined value;
• and
• determining, by the processor, that the first target and the second target do not match the same actual object in response to the correlation coefficient being less than or equal to the predetermined value, and
• performing traversal on a plurality of targets detected in the successive frames to obtain two targets that match the same actual object.