基于面积等效原理的数字射频调制策略
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摘要
为了驱动后级开关功放,全数字发信机需要利用数字射频调制器将输入信号转换为相应的脉冲序列信号.针对现有脉宽调制(PWM)和Delta-Sigma调制(DSM)策略在调制性能及系统实现方面存在的不足,本文利用面积等效原理提出一种新的数字射频调制策略.理论分析和仿真结果表明,本文策略相比PWM和DSM,不仅简化了硬件实现难度,而且能够获得更优的带内SNR和编码效率性能.
In order to drive the switched mode power amplifier(SMPA) for full-digital transmitter,the input Radio Frequency(RF) signal of full-digital transmitter first needs to be transformed into pulse sequences by using the digital RF modulator.Considering the disadvantages in modulation performance and system realization of existing digital RF modulation strategies,especially the Pulse Width Modulation(PWM) and Delta-Sigma Modulation(DSM),a digital RF modulation strategy was proposed and analyzed in this paper by using the area equivalent theory.The theoretical analysis and simulation results show that,compared to the PWM and DSM,the proposed modulation strategy not only reduces the hardware implementation difficulty,but also achieves better performance of the SNR and coding efficiency.
In order to drive the switched mode power amplifier(SMPA) for full-digital transmitter,the input Radio Frequency(RF) signal of full-digital transmitter first needs to be transformed into pulse sequences by using the digital RF modulator.Considering the disadvantages in modulation performance and system realization of existing digital RF modulation strategies,especially the Pulse Width Modulation(PWM) and Delta-Sigma Modulation(DSM),a digital RF modulation strategy was proposed and analyzed in this paper by using the area equivalent theory.The theoretical analysis and simulation results show that,compared to the PWM and DSM,the proposed modulation strategy not only reduces the hardware implementation difficulty,but also achieves better performance of the SNR and coding efficiency.
引文
[1] FRAPPé A,FLAMENT A,STEFANELLI B,et al.An all-digital RF signal generator using high-speed Δ∑modulators[J].IEEE Journal of Solid-State Circuits,2009,44(10):2722-2732.
[2] SILVA N V,OLIVEIRA A S R,GUSTAVSSON U,et al.A novel all-digital multichannel multimode RF transmitter using delta-sigma modulation[J].IEEE Microwave and Wireless Components Letters,2012,22(3):156-158.
[3] ZHOU B,ZHANG K,ZHOU W,et al.Reconfigurable fully digital transmitter with carrier-frequency pulse-width modulation[J].Electronics Letters,2013,49(19):1244-1246.
[4] HUNG T P,RODE J,LARSON L E,et al.Design of H-bridge class-D power amplifiers for digital pulse modulation transmitters[J].IEEE Transactions on Microwave and Techniques,2007,55(12):2845-2855.
[5] 冯辉,秦毅男,林争辉.D类功放中全数字PWM结构的非线性误差校正方法[J].电子学报,2007,35(8):1442-1445.FENG Hui,QIN Yi-nan,LIN Zheng-hui.The method of nolinear error calibration for digital PWM structure in class-D amplifier[J].Acta Electronica Sinica,2017,35(8):1442-1445.(in Chinese)
[6] 朱蕾,周强,谭笑.基于多比特带通Δ∑调制器的射频数字功放[J].电子技术应用,2013,39(8):102-105.ZHULei,ZHOU Qiang,TAN Xiao.RF digital amplifier utilizing multi-bit bandpass delta sigma modulator[J].Application of Electron IC Technique,2013,39(8):102-105.(in Chinese)
[7] 杨金辉,戴瑜兴,易龙强.基于DSP的SVPWM与载波PWM的统一性研究[J].电子学报,2010,38(7):1646-1653.YANG Jin-hui,DAI Yu-xing,YI Long-qiang.DSP based equivalence of SVPWM and carrier-based PWM study[J].Acta Electronica Sinica,2010,38(7):1646-1653.(in Chinese)
[8] RUOTSALAINEN H,ARTHABER H,MAGERL G.A new Quadrature PWM modulator with tunable center frequency for digital RF transmitters[J].IEEE Transactions on Circuits System II Express Briefs,2012,59(11):756-760.
[9] EBRAHIMI M M,HELAOUI M,GHANNOUCHI F M.Delta-sigma-based transmitters:Advantages and disadvantage[J].IEEE Microwave Magazine,2012,14(1):68-78.
[10] MARKERT D,YU X,HEIMPEL H,et al.An all-digital single-bit RF transmitter for massive MIMO[J].IEEE Transactions on Circuits System I Regular Papers,2017,64(3):696-704.
[11] 陈剑斌,周强,谭笑,等.基于2比特DSM的开关功放电平变换策略研究[J].电子学报,2015,43(7):1413-1417.CHEN Jian-bin,ZHOU Qiang,TAN Xiao,et al.The research of level-transform strategy for switching amplifier based on 2 bit delta-sigma modulator[J].Acta Electronica Sinica,2015,43(7):1413-1417.(in Chinese)
[12] SILVA N V,OLIVEIRA A S R,CARVALHO N B.Design and optimization of flexible and coding efficient all-digital RF transmitters[J].IEEE Transactions on Microwave Theory and Techniques,2013,61(1):625-632.
[13] NUYTS P A J,SINGERL P,DIELACHER F,et al.A fully digital delay line based GHz range multimode transmitter front-end in 65-nm CMOS[J].IEEE Journal of Solid-State Circuits,2012,47(7):1681-1692.
[2] SILVA N V,OLIVEIRA A S R,GUSTAVSSON U,et al.A novel all-digital multichannel multimode RF transmitter using delta-sigma modulation[J].IEEE Microwave and Wireless Components Letters,2012,22(3):156-158.
[3] ZHOU B,ZHANG K,ZHOU W,et al.Reconfigurable fully digital transmitter with carrier-frequency pulse-width modulation[J].Electronics Letters,2013,49(19):1244-1246.
[4] HUNG T P,RODE J,LARSON L E,et al.Design of H-bridge class-D power amplifiers for digital pulse modulation transmitters[J].IEEE Transactions on Microwave and Techniques,2007,55(12):2845-2855.
[5] 冯辉,秦毅男,林争辉.D类功放中全数字PWM结构的非线性误差校正方法[J].电子学报,2007,35(8):1442-1445.FENG Hui,QIN Yi-nan,LIN Zheng-hui.The method of nolinear error calibration for digital PWM structure in class-D amplifier[J].Acta Electronica Sinica,2017,35(8):1442-1445.(in Chinese)
[6] 朱蕾,周强,谭笑.基于多比特带通Δ∑调制器的射频数字功放[J].电子技术应用,2013,39(8):102-105.ZHULei,ZHOU Qiang,TAN Xiao.RF digital amplifier utilizing multi-bit bandpass delta sigma modulator[J].Application of Electron IC Technique,2013,39(8):102-105.(in Chinese)
[7] 杨金辉,戴瑜兴,易龙强.基于DSP的SVPWM与载波PWM的统一性研究[J].电子学报,2010,38(7):1646-1653.YANG Jin-hui,DAI Yu-xing,YI Long-qiang.DSP based equivalence of SVPWM and carrier-based PWM study[J].Acta Electronica Sinica,2010,38(7):1646-1653.(in Chinese)
[8] RUOTSALAINEN H,ARTHABER H,MAGERL G.A new Quadrature PWM modulator with tunable center frequency for digital RF transmitters[J].IEEE Transactions on Circuits System II Express Briefs,2012,59(11):756-760.
[9] EBRAHIMI M M,HELAOUI M,GHANNOUCHI F M.Delta-sigma-based transmitters:Advantages and disadvantage[J].IEEE Microwave Magazine,2012,14(1):68-78.
[10] MARKERT D,YU X,HEIMPEL H,et al.An all-digital single-bit RF transmitter for massive MIMO[J].IEEE Transactions on Circuits System I Regular Papers,2017,64(3):696-704.
[11] 陈剑斌,周强,谭笑,等.基于2比特DSM的开关功放电平变换策略研究[J].电子学报,2015,43(7):1413-1417.CHEN Jian-bin,ZHOU Qiang,TAN Xiao,et al.The research of level-transform strategy for switching amplifier based on 2 bit delta-sigma modulator[J].Acta Electronica Sinica,2015,43(7):1413-1417.(in Chinese)
[12] SILVA N V,OLIVEIRA A S R,CARVALHO N B.Design and optimization of flexible and coding efficient all-digital RF transmitters[J].IEEE Transactions on Microwave Theory and Techniques,2013,61(1):625-632.
[13] NUYTS P A J,SINGERL P,DIELACHER F,et al.A fully digital delay line based GHz range multimode transmitter front-end in 65-nm CMOS[J].IEEE Journal of Solid-State Circuits,2012,47(7):1681-1692.
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