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本文提出了一款覆盖0.7至2.5GHz的滑动数字中频正交数字发射机，针对多模NB-IoT应用实现了超过40%的系统效率。该设计通过创新的架构同时支持NB-IoT和BLE多频段，解决了低功耗广域物联网终端的灵活性需求。
Cellular narrowband Internet-of-Things (NB-IoT) is an important branch of low-power wide-area IoT applications, which specifies multiple operation bands over 663 to 915MHz (LB) and 1710 to 2010MHz (MB), up to 23dBm output power for wide-range coverage, and low power consumption for longer battery life. Recently, Bluetooth Low Energy (BLE) at 2.4GHz band (HB) is integrated in NB-IoT modules to provide effective near-field maintenance for NB-IoT terminals, such as intelligent meters, smoke sensors etc. To simultaneously support multiple operation bands for user flexibility, separately optimized LB/MB NB-IoT power amplifiers (PAs) are implemented in [1], which increases design complexity and cost. With advantages of high efficiency, compact die area and direct interface to digital backend, scaling-friendly digital transmitters (DTXs) have become the research hotspot. The polar digital power amplifiers (DPAs) [2,3] and DTXs [4] with high
Chunxiao Hu, Diyang Zheng, Yun Yin, Jie Lin, Yicheng Li, Wei Li, Hongtao Xu
Fudan University, Shanghai, China