Distortion Analysis of Continuous-Wave Radar Sensor for Complete Respiration Pattern Monitoring

Jinghong Chen, Deping Huang, Wei Li, Jin Zou, Changzhi Li

Research output: Contribution to conferencePaperpeer-review


This paper presents two wideband fractional-N frequency synthesizers designed in a 0.13-llm CMOS technology for software-defined radio applications. The first synthesizer adopts a quadrature voltage-controlled oscillator (QVCO) with a new phase shifter scheme, which shows better phase noise performance and more stable oscillation. Combining harmonic rejection and single sideband mixing, a harmonic-rejection SSBmixer (HR-SSBmixer) is developed to suppress unwanted sidebands and spurious signals. The HR­ SSBmixer serves as a power-saving solution to generate the local oscillator (LO) signal for the 802.11a standard by avoiding power-hungry poly-phase filters or high-frequency LO buffers and dividers. The second synthesizer adopts a dual­ mode voltage-controlled oscillator (DMVCO). The DMVCO allows the synthesizer to leverage single-sideband mixing, a power efficient approach, for high-frequency LO signal generation. When compared to the QVCO approach, the DMVCO solution allows the synth
Original languageEnglish
StatePublished - Apr 7 2013


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