QIAO Xiao-qiang1, CAI Yue-ming1, XU Xin1, et al. Joint iterative decision feedback channel estimation and detection for Turbo coded V-BLAST MIMO-OFDM systems[J]. 2006, (1): 103-108.DOI:
Turbo编码V-BLAST MIMO-OFDM系统中的联合迭代判决反馈信道估计与检测
摘要
针对Turbo编码V-BLASTMIMO-OFDM系统
提出了一种联合迭代判决反馈信道估计与检测方案
该方案将Turbo迭代译码与最小二乘(LS
leastsquare)信道估计相结合
充分利用Turbo迭代译码后的信息位和校验位软值信息来改善信道估计性能。仿真结果表明
该方案不仅纠正了低信噪比时的差错传播问题
还使得整个系统的信道估计性能得到进一步提高
且适合于非常恶劣的信道环境。
Abstract
For Turbo coded V-BLAST MIMO-OFDM systems
a joint iterative decision feedback channel estimation and detection scheme were presented
which combined the Turbo iterative decoding with least square channel estimation
and made full use of the soft systematic bits and soft parity bits of Turbo iterative decoding to improve the channel estimation performance.The simulation results showed that not only the error propagation was corrected at low signal-noise-ratio but also the channel estimation performance of the whole system was improved greatly.Furthermore
the scheme is applicable for very bad channel environments.