A 4D millimeter-wave radar design method based on phase modulation

By using phase modulation technology in millimeter wave radar, the transmitter and receiver demodulate orthogonal demodulation is performed to form a two-dimensional virtual array, solving the problems of consolidation rate and Doppler fuzzy in the existing technology, and realizing the radar's 4D detection capability.

CN114089327BActive Publication Date: 2025-03-28XIAN WEIYUAN DITAI MICROSYSTEM TECH CO LTD
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Patent Information

Application Number
CN202111369870.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-11-18
Publication Date
2025-03-28
Estimated Expiration
2041-11-18

AI Technical Summary

Technical Problem

When existing millimeter-wave radars realize joint detection of azimuth and pitch dimensions, the synthetic radiation power is limited, and Doppler fuzziness leads to compensation errors, making it difficult to achieve 4D detection.

Method used

Using a 4D millimeter wave radar design method based on phase modulation, M×N repetitive pulses are transmitted through slow time-dimensional frequency modulation continuous wave pulse modulation, and a two-dimensional virtual array is formed by orthogonal demodulation at the receiving end to realize the joint angle measurement of azimuth and pitch dimensions.

Benefits of technology

Without increasing the radar transmission and reception bandwidth, 4D detection capabilities are achieved, effectively solving the problem of limited success rate of time-division MIMO radar and phase compensation errors in Doppler fuzzy. It can be widely used in advanced assisted driving and autonomous driving.

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Abstract

The present invention discloses a 4D millimeter wave radar design method based on phase modulation, which specifically relates to the field of 4D detection technology, including step 1: designing the fast time dimension pulse modulation mode of the millimeter wave radar as a frequency modulated continuous wave, and transmitting M×N repeated pulses in the slow time dimension within a coherent processing cycle; step 2: the N pulses used for transmitting orthogonal modulation can be phase-encoded for Q transmission channels, and Q<2 N The present invention obtains orthogonal transmission signals through phase modulation in the slow time dimension; separates the signals of each transmission channel through signal demodulation at the receiving end; and synthesizes a two-dimensional array antenna by forming a virtual array in two dimensions of the antenna plane; the final two-dimensional array antenna can perform joint angle measurement in azimuth and elevation dimensions, and realize 4D detection without increasing the radar transceiver bandwidth; it can be widely used in millimeter-wave radar systems in the field of advanced driver assistance and autonomous driving.
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