一种改进的多模索引调制OFDM方案
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摘要
为提高多模索引调制正交频分复用的能量效率,提出一种改进方案和相应的检测算法.该方案在不消耗能量的情况下能通过空载模式传递部分信息,还能通过改变空载模式与其他模式的比例来实现频谱效率和能量效率的兼顾.分析了空载模式对误比特率性能的影响,并据此对加入空载模式后的多模式星座进行优化;此外,提出改进的低复杂度最大似然检测算法,在不降低误比特率性能的前提下进一步降低多模方案的检测复杂度.仿真结果表明:在瑞利衰落信道下,当误比特率为1×10~(-5),频谱效率为1.75,2.00,3.00,4.00 bit/s/Hz时,所提方案分别取得了6.0,3.7,3.4,1.7 dB的信噪比增益.
To improve the energy efficiency of the multiple-mode orthogonal frequency division multiplexing with index modulation(MM-OFDM-IM),an improved scheme and corresponding detection algorithm were proposed.The scheme transmits part of the information through no-load mode without consuming energy.By changing the ratio of no-load mode to other modes,a tradeoff between energy efficiency and spectral efficiency can be achieved. The effect of the no-load mode on the bit error rate performance was analyzed,and the multi-mode constellation after adding no-load mode was optimized accordingly.In addition,an improved low complexity maximum likelihood detection(LC-MLD) algorithm was proposed to further reduce the detection complexity of multiple-mode scheme without reducing the spectral efficiency performance. Simulation results show that in the Rayleigh fading channel,when bit error rate is 1×10~(-5),spectral efficiency is 1.75,2.00,3.00 or 4.00 bit/s/Hz,the proposed scheme achieves signal-to-noise ratio gains of about 6.0,3.7,3.4 and 1.7 dB,respectively.
To improve the energy efficiency of the multiple-mode orthogonal frequency division multiplexing with index modulation(MM-OFDM-IM),an improved scheme and corresponding detection algorithm were proposed.The scheme transmits part of the information through no-load mode without consuming energy.By changing the ratio of no-load mode to other modes,a tradeoff between energy efficiency and spectral efficiency can be achieved. The effect of the no-load mode on the bit error rate performance was analyzed,and the multi-mode constellation after adding no-load mode was optimized accordingly.In addition,an improved low complexity maximum likelihood detection(LC-MLD) algorithm was proposed to further reduce the detection complexity of multiple-mode scheme without reducing the spectral efficiency performance. Simulation results show that in the Rayleigh fading channel,when bit error rate is 1×10~(-5),spectral efficiency is 1.75,2.00,3.00 or 4.00 bit/s/Hz,the proposed scheme achieves signal-to-noise ratio gains of about 6.0,3.7,3.4 and 1.7 dB,respectively.
引文
[1]ISHIKAWA N,SUGIURA S,HANZO L.Subcarrierindex modulation aided OFDM-will it work?[J].IEEEAccess,2016,4:2580-2593.
[2]LU S,HEMADEH I A,El-HAJJAR M,et al.Compressed-sensing-aided space-time frequency index modulation[J].IEEE Transactions on Vehicular Technology,2018,67(7):6259-6271.
[3]DATTA T,ESHWARAIAH H S,CHOCKALINGAMA.Generalized space-and-frequency index modulation[J].IEEE Transactions on Vehicular Technology,2016,65(7):4911-4924.
[4]BASAR E.On multiple-input multiple-output OFDMwith index modulation for next generation wireless networks[J].IEEE Transactions on Signal Processing,2016,64(15):3868-3878.
[5]BASAR E,WEN M W,MESLEH R,et al.Index modulation techniques for next-generation wireless networks[J].IEEE Access,2017,5:16693-16746.
[6]BASAR E,AYGOLU U,PANAYIRCI E,et al.Orthogonal frequency division multiplexing with index modulation[J].IEEE Transactions on Signal Processing,2013,61(22):5536-5549.
[7]FAN R,YU Y J,GUAN Y L.Generalization of orthogonal frequency division multiplexing with index modulation[J].IEEE Transactions on Wireless Communications,2015,14(10):5350-5359.
[8]BASAR E.OFDM with index modulation using coordinate interleaving[J].IEEE Wireless Communications Letters,2015,4(4):381-384.
[9]WEN M W,CHENG X,MA M,et al.On the achievable rate of OFDM with index modulation[J].IEEE Transactions on Signal Processing,2016,64(8):1919-1932.
[10]ZHENG B X,CHEN F J,WEN M W,et al.Lowcomplexity ML detector and performance analysis for OFDM with in-phase/quadrature index modulation[J].IEEE Communications Letters,2015,19(11):1893-1896.
[11]MAO T Q,WANG Z C,WANG Q,et al.Dual-mode index modulation aided OFDM[J].IEEE Access,2017,5:50-60.
[12]MAO T Q,WANG Q,WANG Z C.Generalized dualmode index modulation aided OFDM[J].IEEE Communications Letters,2017,21(4):761-764.
[13]WEN M W,BASAR E,LI Q,et al.Multiple-mode orthogonal frequency division multiplexing with index modulation[J].IEEE Transactions on Communications,2017,65(9):3892-3906.
[2]LU S,HEMADEH I A,El-HAJJAR M,et al.Compressed-sensing-aided space-time frequency index modulation[J].IEEE Transactions on Vehicular Technology,2018,67(7):6259-6271.
[3]DATTA T,ESHWARAIAH H S,CHOCKALINGAMA.Generalized space-and-frequency index modulation[J].IEEE Transactions on Vehicular Technology,2016,65(7):4911-4924.
[4]BASAR E.On multiple-input multiple-output OFDMwith index modulation for next generation wireless networks[J].IEEE Transactions on Signal Processing,2016,64(15):3868-3878.
[5]BASAR E,WEN M W,MESLEH R,et al.Index modulation techniques for next-generation wireless networks[J].IEEE Access,2017,5:16693-16746.
[6]BASAR E,AYGOLU U,PANAYIRCI E,et al.Orthogonal frequency division multiplexing with index modulation[J].IEEE Transactions on Signal Processing,2013,61(22):5536-5549.
[7]FAN R,YU Y J,GUAN Y L.Generalization of orthogonal frequency division multiplexing with index modulation[J].IEEE Transactions on Wireless Communications,2015,14(10):5350-5359.
[8]BASAR E.OFDM with index modulation using coordinate interleaving[J].IEEE Wireless Communications Letters,2015,4(4):381-384.
[9]WEN M W,CHENG X,MA M,et al.On the achievable rate of OFDM with index modulation[J].IEEE Transactions on Signal Processing,2016,64(8):1919-1932.
[10]ZHENG B X,CHEN F J,WEN M W,et al.Lowcomplexity ML detector and performance analysis for OFDM with in-phase/quadrature index modulation[J].IEEE Communications Letters,2015,19(11):1893-1896.
[11]MAO T Q,WANG Z C,WANG Q,et al.Dual-mode index modulation aided OFDM[J].IEEE Access,2017,5:50-60.
[12]MAO T Q,WANG Q,WANG Z C.Generalized dualmode index modulation aided OFDM[J].IEEE Communications Letters,2017,21(4):761-764.
[13]WEN M W,BASAR E,LI Q,et al.Multiple-mode orthogonal frequency division multiplexing with index modulation[J].IEEE Transactions on Communications,2017,65(9):3892-3906.