Effect of Phase Control Based PAPR Reduction in MIMO Adaptive Modulated Vector Coding Systems
Effect of Phase Control Based PAPR Reduction in MIMO Adaptive Modulated Vector Coding Systems
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MIMO 自适应调制矢量编码系统中基于相位控制的 PAPR 降低效果
DOI：
10.1109/wcsp.2011.6096816
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Osamu Muta
中科院分区：
文献类型：
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作者：
Pichanee Lumyong;Mitsugu Iwamoto and Kazuo Ohta;Osamu Muta
针对矢量编码（VC）系统中的高峰均功率比（PAPR）问题，研究了基于相位控制的选择映射和部分发送序列等方法。针对采用Turbo码的多输入多输出（MIMO）自适应调制矢量编码系统，提出了一种基于相位控制的相位序列盲估计方法，用于降低系统的峰均比。在接收端，利用解码器的软输出信息，采用最大似然法从所有候选序列中选择最大似然序列，估计相位序列分量。计算机仿真结果表明，当SLM中候选序列数为M = 16时，在CCDF为10- 6的情况下，SISO和MIMO情况下的发射信号瞬时功率分别比未降低峰均比的情况下降低约4.5dB和3.4dB，而几乎相同的误块率（BLER）性能和相同的吞吐量性能的情况下，完美的相位序列估计的衰减6径瑞利衰落条件下获得。
As a solution to high peak-to-average power ratio (PAPR) problems in vector coding (VC) systems, phase control based methods such as selected mapping and partial transmit sequence have been investigated. In this paper, a phase sequence blind estimation method is presented for PAPR reduction based on phase control in multi-input multi-output (MIMO) adaptive modulated vector coding systems, where Turbo code is employed. On the receiver side, the phase sequence component is estimated using a maximum likelihood method which selects the most likelihood sequence among all candidate ones by exploiting soft output information of the decoder. Computer simulation results show that when the number of candidate sequences in SLM is M = 16, instantaneous power of the transmit signal at the CCDF of 10-6can be reduced by about 4.5dB and 3.4dB for SISO and MIMO cases as compared to case without PAPR reduction, while almost the same block error rate (BLER) performance and the same throughput performance as case of the prefect phase sequence estimation are achieved in attenuated 6-path Rayleigh fading condition.