⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种对带外干扰具有鲁棒性的软件无线电接收机架构，通过谐波抑制混频器等技术减少带外干扰引起的问题。解决了传统SDR接收机因减少射频滤波而面临的阻塞、谐波混频等干扰难题。
In a software-defined radio (SDR) receiver it is desirable to minimize RF bandfiltering for flexibility, size and cost reasons, but this leads to increased outof-band interference (OBI). Besides harmonic and intermodulation distortion (HD/IMD), OBI can also lead to blocking and harmonic mixing. A wideband LNA [1, 2] amplifies signal and interference with equal gain. Even a low gain of 6dB can clip 0dBm OBI to a 1.2V supply, blocking the receiver. Hard-switching mixers not only translate the wanted signal to baseband but also the interference around LO harmonics. Harmonic rejection (HR) mixers have been used [3, 1, 4], but are sensitive to phase and gain mismatch. Indeed the HR in [4] shows a large spread, whereas other work only shows results from one chip [3, 1]. This paper describes techniques to relax blocking and HD/IMD, and make HR robust to mismatch. The zero-IF architecture described targets the 0.4-to-6GHz band, where most
Z. Ru, E. A. M. Klumperink, G. J. M. Wienk, B. Nauta
University of Twente, Enschede, Netherlands