基于MIMO发射机串扰行为模型的研究
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摘要
MIMO(Multiple-Input Multiple-Output)发射机的多个发射通道集成在同一电路板上,易产生线性和非线性串扰,严重影响数字预失真的性能。从理论上分析线性和非线性串扰,提出了线性和非线性串扰基函数的数学表达式。对于2×2 MIMO发射机,通过线性和非线性串扰基函数提出了2×2 MIMO发射机功放行为模型,并且推广到n×n MIMO的功放行为模型,同时对功放行为模型进行了简化。仿真结果表明,提出的模型能够模拟功放非线性、记忆效应、线性串扰和非线性串扰,同时降低了模型的复杂度。
One of the major issuesin MIMO(Multiple-Input Multiple-Output) transceivers design isthatthe multiple transmitter paths are integrated on the same circuitboard,this would easily nonlinear and linear crosstalk and seriously affect the performance of the conventional digital predistortion. The linear and non-linear crosstalk is theoretically analyzed, and the mathematical expression of nonlinear and linear crosstalk also proposed.For a 2×2 MIMO transceiver,the 2×2 MIMO PA(power amplifier)model is proposedvia nonlinear and linear crosstalk basis functions, and is extended to the case of n×n MIMO PAmodel. At the same time, the PAmodel is simplified. Experiment results indicate that the proposed model can effectively simulate memory effect,nonlinear and linear crosstalk of the power amplifier. And what's more, its complexity is clearly reduced.
One of the major issuesin MIMO(Multiple-Input Multiple-Output) transceivers design isthatthe multiple transmitter paths are integrated on the same circuitboard,this would easily nonlinear and linear crosstalk and seriously affect the performance of the conventional digital predistortion. The linear and non-linear crosstalk is theoretically analyzed, and the mathematical expression of nonlinear and linear crosstalk also proposed.For a 2×2 MIMO transceiver,the 2×2 MIMO PA(power amplifier)model is proposedvia nonlinear and linear crosstalk basis functions, and is extended to the case of n×n MIMO PAmodel. At the same time, the PAmodel is simplified. Experiment results indicate that the proposed model can effectively simulate memory effect,nonlinear and linear crosstalk of the power amplifier. And what's more, its complexity is clearly reduced.
引文
[1]Paulraj A,Gore D,Nabar R,et al.An Overview of MIMOCommunications:a Key to Gigabit Wireless[C].United States:IEEE Press,2004:198-218.
[2]Palaskas Y,Ravi A,Pellerano S,et al.A 5 GHz 108 Mb/s 2×2 MIMO Transceiver RFIC with Fully Integrated20.5-d Bm P1d B Power Amplifiers in 90 nm CMOS[J].IEEEJournal of Solid-State Circuits,2006,41(12):2746-2756.
[3]谷林海,葛利嘉.功放数字预失真技术现状与未来发展[J].通信技术,2015,48(11):1207-1212.GU Lin-hai,GE Li-jia.Digital Predistortion Technology for Power Amplifier and Future Development[J].Communications Technology,2015,48(11):1207-1212.
[4]Saffar D,Boulejfen N,Ghannouchi F M,et al.Behavioral Modeling of MIMO Nonlinear Systems with Multivariable Polynomials[J].IEEE Transactions on Microwave Theory and Techniques,2011,59(11):2994-3003.
[5]Amin S,Landin P N,Handel P,et al.Behavioral Modeling and Linearization of Crosstalk and Memory Effects in RFMIMO Transmitters[J].IEEE Transactions on Microwave Theory and Techniques,2014,62(04):810-823.
[6]Lee S,Kim M,Sirl Y.Digital Predistortion for Power Amplifiers in Hybrid MIMO Systems with Antenna Subarrays[C].IEEE Vehicular Technology Conference,2015:1-5.
[7]Suryasarman P M,Springer A.A Compensation Analysis of Adaptive Sigital Predistortion Algorithms for Multiple Antenna Transmitters[J].IEEE Transactions on Circuits Systems I:Regular Papers,2015,62(05):1412-1420.
[8]GU Lin-hai,GE Lu,GE Li-jia,et al.Adaptive Crossover and Crosstalk Canceling DPD for MIMOTransmitters[C].2016 IEEE 6th International Conference on Electronics Information and Emergency Communicati on(ICEIEC),2016:236-239.
[9]Qi J,Aissa S.Analysis and Compensation of Power Amplifier Nonlinearity in MIMO Transmit Diversity Systems[J].IEEE Transactions on Vehicular Technolo gy,2010,59(06):2912-2931.
[10]Kim J,Konstantinou K.Digital Predistortion of Wideband Signals based on Power Amplifier Model with Memory[J].Electronics Letters,2001,37(23):1417-1418.
[2]Palaskas Y,Ravi A,Pellerano S,et al.A 5 GHz 108 Mb/s 2×2 MIMO Transceiver RFIC with Fully Integrated20.5-d Bm P1d B Power Amplifiers in 90 nm CMOS[J].IEEEJournal of Solid-State Circuits,2006,41(12):2746-2756.
[3]谷林海,葛利嘉.功放数字预失真技术现状与未来发展[J].通信技术,2015,48(11):1207-1212.GU Lin-hai,GE Li-jia.Digital Predistortion Technology for Power Amplifier and Future Development[J].Communications Technology,2015,48(11):1207-1212.
[4]Saffar D,Boulejfen N,Ghannouchi F M,et al.Behavioral Modeling of MIMO Nonlinear Systems with Multivariable Polynomials[J].IEEE Transactions on Microwave Theory and Techniques,2011,59(11):2994-3003.
[5]Amin S,Landin P N,Handel P,et al.Behavioral Modeling and Linearization of Crosstalk and Memory Effects in RFMIMO Transmitters[J].IEEE Transactions on Microwave Theory and Techniques,2014,62(04):810-823.
[6]Lee S,Kim M,Sirl Y.Digital Predistortion for Power Amplifiers in Hybrid MIMO Systems with Antenna Subarrays[C].IEEE Vehicular Technology Conference,2015:1-5.
[7]Suryasarman P M,Springer A.A Compensation Analysis of Adaptive Sigital Predistortion Algorithms for Multiple Antenna Transmitters[J].IEEE Transactions on Circuits Systems I:Regular Papers,2015,62(05):1412-1420.
[8]GU Lin-hai,GE Lu,GE Li-jia,et al.Adaptive Crossover and Crosstalk Canceling DPD for MIMOTransmitters[C].2016 IEEE 6th International Conference on Electronics Information and Emergency Communicati on(ICEIEC),2016:236-239.
[9]Qi J,Aissa S.Analysis and Compensation of Power Amplifier Nonlinearity in MIMO Transmit Diversity Systems[J].IEEE Transactions on Vehicular Technolo gy,2010,59(06):2912-2931.
[10]Kim J,Konstantinou K.Digital Predistortion of Wideband Signals based on Power Amplifier Model with Memory[J].Electronics Letters,2001,37(23):1417-1418.