Low Complexity Adaptive Turbo Space-Frequency Equalization for Single-Carrier Multiple-Input Multiple-Output Systems
Low Complexity Adaptive Turbo Space-Frequency Equalization for Single-Carrier Multiple-Input Multiple-Output Systems
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DOI：
10.1109/twc.2008.070095
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发表时间：
2008-06
影响因子：
10.4
通讯作者：
Ye Wu;Xu Zhu;A. Nandi
中科院分区：
文献类型：
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作者：
Ye Wu;Xu Zhu;A. Nandi
通过将单载波频域均衡（FDE）和Turbo均衡相结合，我们提出了一种基于最小均方误差（MMSE）的块式低复杂度Turbo空频均衡（TSFE）结构，该结构比符号式TSFE和Turbo时域均衡（TTDE）结构的复杂度大大降低。在中等码率下，所提出的SC TSFE在相当的复杂性下显着优于其Turbo OFDM （TOFDM）对口。此外，基于最小均方结构化信道估计（LMS-SCE）的TSFE在具有完美信道状态信息（CSI）的情况下提供了接近的性能，并具有较高的收敛速度。
By combining single-carrier (SC) frequency domain equalization (FDE) and Turbo equalization, we propose a minimum mean square error (MMSE) based block-wise low complexity Turbo space-frequency equalization (TSFE) structure, which offers a tremendous complexity reduction over the symbol-wise TSFE and Turbo time-domain equalization (TTDE) structures. With a moderate code rate, the proposed SC TSFE significantly outperforms its Turbo OFDM (TOFDM) counterpart, at a comparable complexity. Besides, TSFE based on the least-mean-square structured channel estimation (LMS-SCE) provides a performance close to the case with perfect channel state information (CSI), at a high convergence rate.