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本文提出一种宽频带复制抑制数字发射机，采用联合数字-模拟插值和滤波技术，在28nm CMOS工艺下实现。该设计解决了传统数字发射机中为覆盖宽频带而需分离低频/高频链路导致面积大和复杂度高的问题。
*Equally Credited Authors (ECAs) There are multiple wireless communication standards in the crowded sub-6GHz band and the trend of data throughputs is continuously increasing. In the last few years, digital transmitters (DTXs) have been widely explored due to their high efficiency, compact area, high flexibility and easy migration to advanced CMOS process [1-5]. In order to support wideband RF coverage, separately optimized LB/HB RF chains are usually implemented [67], which increase die area and design complexity. In addition, in the DTX architecture, the undesired sampling replicas located at fLO+n×fs are close to signal band and directly violate the emission-mask requirement, which would interfere with other communication devices [8-10]. As a result, the high sampling rate of digital signal processing and off-chip highquality RF filters are often required to filter these sampling replicas, which results in
Chunxiao Hu*, Jiaxiang Li*, Jie Lin, Hongtao Xu, Yun Yin
Fudan University, Shanghai, China