A 2.6-Ghz Partial-Envelope Delta–Sigma-Digitized Carrier-Bursting Transmitter
IEEE microwave and wireless components letters(2020)
摘要
This letter presents the implementation and measurement results of a partially digitized envelope-based carrier-bursting transmitter operating at 2.6 GHz. The transmitter consists of two chips, in this case: a partial-envelope delta-sigma modulator (PEDSM) and an up-conversion mixer with 130-nm CMOS technology. A second-order continuous-time delta-sigma modulator with a 622-MHz sampling clock is designed as an envelope digitizer in the PEDSM. With a long-term evolution signal with a peak-to-average power ratio of 8.7 dB, the fabricated transmitter showed a coding efficiency of 90.4% and an error vector magnitude (EVM) of 3.44% for a PEDSM threshold level of 1/3.
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关键词
Encoding,Long Term Evolution,Modulation,Peak to average power ratio,Radio transmitters,Mixers,Carrier-bursting transmitter,class-S,delta-sigma modulation,long term evolution (LTE),MOS integrated circuits,orthogonal frequency-division multiplexing (OFDM),power amplifiers (PAs),radio frequency (RF) integrated circuits
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