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该论文提出了一种用于5G NR应用的干扰容忍谐波弹性接收机，解决了SAW-less宽带接收机中因谐波干扰导致线性度下降的问题。通过早期谐波抑制技术，实现了大于+10dBm的三次谐波阻断器1dB压缩点。
The sub-6GHz spectrum is heavily utilized by 5G New Radio (NR), as well as traditional cellular and WiFi technologies. A major challenge in designing SAW-less wideband radio receivers (especially targeting the sub-2GHz range) is rejecting interferers at or around the operation frequency and its harmonics that are within the congested sub-6GHz spectrum. Given the stringent linearity requirements of 5G systems, the harmonic rejection should happen early in the receiver (RX) chain to avoid desensitizing the receiver and achieve a high harmonic blocker 1dB compression point (HB1dB). Traditional harmonic-rejecting (HR) receivers employ weighted harmonic recombination at baseband (BB) to achieve harmonic rejection only at the receiver output and hence do not protect the RF front-end from large harmonic blockers [1]. The noise-canceling mixer-first RX with HR-TIAs in [2] is susceptible to downconverted harmonics at the TIA
Soroush Araei, Shahabeddin Mohin, Negar Reiskarimian
Massachusetts Institute of Technology, Cambridge, MA