In this paper, we improved the error vector magnitude (EVM) performance of six-port receiver using a low noise amplifier (LNA) bias control algorithm based on analyzing the correlation between normalized output DC offset voltage and EVM relative to input radio frequency (RF) power variation. In contrast to the other works published in the literature, we consider test setup through which the software impairments of six-port receiver blocks are considered. Therefore, in this work to substantiate the EVM improvement, a designed 26–30 GHz CMOS six-port receiver is used which consists of LNA, coupled line bandpass filter, six-port correlator, diode power detectors and two instrumentation amplifiers for recovering the baseband I/Q data. The EVM improvement process is assessed in terms of 64QAM modulation, and according to obtained results, EVM is reduced from 61% when using constant DC bias to 22% achieved with an LNA bias control algorithm for low input power (− 60 dBm) at the center frequency of 28 GHz. Moreover, the EVM is become less sensitive to input RF power, and also the dynamic range is improved more than 20 dB.

在本文中，我们通过分析归一化输出直流偏移电压和EVM与输入射频（RF）的相关性，使用低噪声放大器（LNA）偏置控制算法改善了六端口接收机的误差矢量幅度（EVM）性能。 ）功率变化。与文献中发表的其他著作相反，我们考虑通过测试设置来考虑六端口接收器模块的软件损伤。因此，为了证实EVM的改进，使用了设计的26-30 GHz CMOS六端口接收机，该接收机由LNA，耦合线带通滤波器，六端口相关器，二极管功率检测器和两个用于恢复基带的仪表放大器组成I / Q数据。根据64QAM调制评估了EVM改进过程，并根据获得的结果，EVM从使用恒定DC偏置时的61％降至使用LNA偏置控制算法在28 GHz中心频率下的低输入功率（− 60 dBm）时所达到的22％。此外，EVM对输入RF功率的敏感性降低，动态范围也提高了20 dB以上。