期刊
IEEE JOURNAL OF SOLID-STATE CIRCUITS
卷 56, 期 5, 页码 1332-1344出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2021.3050306
关键词
Automotive; CMOS; frequency-modulated continuous wave (FMCW); long-range radar (LRR); mm-wave; multiple-input multiple-output (MIMO); noise figure (NF); process; supply voltage; and temperature (PVT)
An automotive 77-GHz long-range radar with advanced CMOS technology integrates multiple functional modules to achieve long-distance detection and high-quality signal transmission. Both the receiver and transmitter demonstrate good performance, ensuring accuracy and stability for the radar system.
An automotive 77-GHz long-range radar (LRR) with an 8-channel receiver (RX) and a 3-channel transmitter (TX) in 40-nm CMOS technology is presented. It integrates a 38.5-GHz phase-locked loop (PLL), a transmitter power detector (DET) and power calibration loop, a crystal oscillator (XO), built-inself-test (BIST) circuits, an SRAM, an eFuse, a temperature compensation calibration loop with a lookup table (LUT) and a temperature sensor, a serial peripheral interface (SPI), and a multiple-input multiple-output (MIMO) control logic. The receiver shows a noise figure (NF) of 8.7 dB and input-referred 1-dB compression point (IP1-dB) of -7.4 dBm. The NF and IP1-dB under the worst conditions are 14 dB and -10 dBm, respectively. The transmitter shows output power of 14.1 dBm and phase noise of -116 dBc/Hz at a 12.5-MHz offset frequency, which corresponds to the frequency of 250-m objects for the fast-chirp frequency-modulated continuous wave (FMCW) radar. The proposed radar module utilizes two transmitter channels for horizontal detection. A 2 x 8 time-division-multiplexing MIMO (TDM-MIMO) technique provides a detection range of 250 m.
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