Fast Block LMS Based Estimation of Angularly Sparse Channels for Single-Carrier Wideband Millimeter Wave Hybrid MIMO Systems

被引:17
作者
Srivastava, Suraj [1 ]
Sharma, Pooja [2 ]
Dwivedi, Saumya [3 ]
Jagannatham, Aditya K. [1 ]
Hanzo, Lajos [4 ]
机构
[1] Indian Inst Technol Kanpur, Dept Elect Engn, Kanpur 208016, Uttar Pradesh, India
[2] Qualcomm, Hyderabad 500081, India
[3] Radisys, Bangalore 560103, Karnataka, India
[4] Univ Southampton, Sch Elect & Comp Sci, Southampton SO17 1BJ, Hants, England
基金
英国工程与自然科学研究理事会; 欧洲研究理事会;
关键词
Systematics; Frequency-domain analysis; Simulation; Millimeter wave technology; Channel estimation; Wideband; MIMO communication; Block LMS; channel estimation; frequency-domain equalization (FDE); hybrid MIMO; least mean squares; mmwave communication; single-carrier (SC); sparse LMS; sparsity; MODULATION; OFDM;
D O I
10.1109/TVT.2020.3049026
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Adaptive block-based least-mean squares (BLMS)-based techniques are conceived for channel estimation in single-carrier (SC) wideband millimeter wave (mmWave) hybrid MIMO systems. In this context, a frequency-domain channel estimation model is developed for SC wideband systems, followed by a novel fast BLMS (FBLMS) technique, which has a significantly lower computational complexity than the existing channel estimation schemes designed for mmWave hybrid MIMO systems. The proposed FBLMS technique is also robust, since it does not require any second-order statistical information, such as the cross-covariance vector and covariance matrix. Next a beamspace domain representation of the mmWave MIMO channel is obtained, followed by the development of the sparse-FBLMS (SFBLMS) scheme for the estimation of the wideband mmWave MIMO channel that additionally exploits the angular-sparsity for improved channel estimation performance. Analytical expressions are derived for the mean squared estimation error (MSEE) and mean squared observation error (MSOE) of both the proposed FBLMS and SFBLMS techniques. Furthermore, a systematic procedure is developed for determining the beneficial range of the values of the regularization parameter, which ensures a high channel estimation accuracy of the SFBLMS over FBLMS. A hybrid precoder and combiner design is also proposed for SC wideband systems by employing the channel estimates obtained using the above techniques. Simulation results are presented to illustrate the performance of the proposed BLMS-based schemes in comparison to the existing schemes, which closely match the theoretical results derived.
引用
收藏
页码:666 / 681
页数:16
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