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JCR70 A Low-Complexity Millimeter-Wave Proof-of-Concept Platform for A Fully-Digital MIMO Joint Communication-Radar

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Document pages: 14 pages

Abstract: A fully-digital wideband joint communication-radar (JCR) with amultiple-input-multiple-output (MIMO) architecture at the millimeter-wave(mmWave) band will enable high joint communication and radar performance withenhanced design flexibility. A quantized receiver with few-bitanalog-to-digital converters (ADCs) will enable a practical JCR solution withreduced power consumption for futuristic portable devices and autonomousvehicles. In this paper, we present a joint communication-radarproof-of-concept platform, named JCR70, to evaluate and demonstrate theperformance of these JCR systems using real channel measurements in the 71-76GHz band. We develop this platform by extending a mmWave communication set-upwith an additional full-duplex radar receiver and by capturing the MIMO JCRchannel using a moving antenna on a sliding rail. To characterize the JCRperformance of our developed tested, we conduct several indoor and outdoorexperiments and apply traditional as well as advanced processing algorithms onthe measured data. Additionally, we compare the performance of our JCR70platform with the INRAS Radarbook, which is a state-of-the-art automotive radarevaluation platform at 77 GHz. The results demonstrate that a quantizedreceiver with 2-4 bit ADCs generally performed quite close to thehigh-resolution ADC for a signal-to-noise ratio of up to 5 dB. Our JCR70platform with a fully digital JCR waveform at 73 GHz and 2 GHz bandwidthachieved higher resolution capability than the Radarbook due to higherbandwidth and larger synthesized antenna aperture.

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