Reconfigurable All-Band RF CMOS Transceiver for GPS/GLONASS/Galileo/Beidou With Digitally Assisted Calibration
Reconfigurable All-Band RF CMOS Transceiver for GPS/GLONASS/Galileo/Beidou With Digitally Assisted Calibration
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DOI：
10.1109/tvlsi.2014.2348593
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发表时间：
2015-09-01
影响因子：
2.8
通讯作者：
Tang, Minghua
中科院分区：
文献类型：
--
作者：
Li, Songting;Li, Jiancheng;Tang, Minghua
提出了一种基于55 nm芯片的GPS/GLONASS/Galileo/Beidou全集成可重构射频收发信机。该收发机包括三个低中频接收器(RX)和一个直接上转换BPSK发射器(TX)，可以配置为接收任何两个全球导航卫星系统(GNSS)信号，也可以切换为处理中国北斗(I)信号。在接收GNSS信号的同时，集成了一个交换模块来提供不同射频前端和中频通道(IFC)之间的连接，这将有效地简化IFC的设计复杂性，节省功耗。采用两个频率合成器的灵活频率方案来满足收发信机不同的本地振荡器要求。使用误差补偿逻辑的优化自动频率校准方案能够实现快速和高精度的校准过程，以实现最佳锁相环操作。集成了多个数字辅助校准模块，以确保芯片性能仅表现出对工艺、电压和温度(PVT)的弱依赖。在1.2 V电源电压下，每个RX通道的功耗约为21.5-30.2 mA，在I/Q失配校准后，RX的镜像抑制比大于49 dB，自动增益控制范围为88 d B，输入参考1 d B压缩点优于-25 dBm，最小噪声系数约为2 d B。TX的输出功率约为5dBm，误差向量幅度(EVM)约为6%，1.2V电源的电流约为30 mA。整个收发器的芯片面积为2.8x3 mm(2)。
This paper presents a fully integrated reconfigurable all-band RF transceiver for GPS/GLONASS/Galileo/Beidou in 55-nm CMOS. The transceiver incorporates three low-IF receivers (RXs) and one direct up-conversion BPSK transmitter (TX), which can be configured to receive any two global navigation satellite system (GNSS) signals or switched to process the Chinese Beidou(I) signals. A switching module is integrated to provide the connectivity between different RF front-end and IF channel (IFC), which will effectively simplify the design complexity of the IFC and save power consumption, while the GNSS signals are received. A flexible frequency plan with two frequency synthesizers is utilized to satisfy different local oscillator requirements of the transceiver. An optimized automatic frequency calibration scheme using an error compensation logic enables fast and high-precision calibration process for optimum phase-locked loop operation. Several digitally assisted calibration modules are integrated to ensure that the chip performance only shows a weak process, voltage and temperature (PVT) dependence. While drawing about 21.5-30.2 mA per RX channel from a 1.2-V supply, the RXs achieve an image rejection ratio more than 49 dB after I/Q mismatch calibration, an automatic gain control range of 88 dB, and an input-referred 1 dB compression point of better than -25 dBm with a minimum noise figure of about 2 dB. The output power of the TX is about 5 dBm with about 6% error vector magnitude (EVM) and 30-mA current from a 1.2-V supply. The whole transceiver consumes a die area of 2.8 x 3 mm(2).