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Hybrid Precoding Scheme with Partial CSI at the Transmitter
2012This work proposes an Hybrid Precoding (HP) method in a Multiple-Input/Multiple-Output (MIMO) system with the objective of reducing the computational complexity inherent to nonlinear precoding methods. We show that linear precoders work better for low Signal-to- Noise Ratio (SNR) while nonlinear precoders, as in the case of the nonlinear Tomlinson ...
Josmary Labrador +3 more
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Linear Space-Time Precoder with Hybrid ARQ Transmission
IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007Hybrid automatic-repeat-request(HARQ) scheme can be incorporated with the linear precoder in multi-input multi- output(MIMO) transmission to ensure highly reliable communications. To fully utilize type-I HARQ diversity gain especially in the slow fading channels, we propose the optimal design principle of linear precoders, whose column vectors are ...
Kan Zheng +3 more
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Subarray hybrid precoding for massive MIMO capacity maximization
2017 IEEE 17th International Conference on Ubiquitous Wireless Broadband (ICUWB), 2017An effective solution for reducing complexity and power consumption of massive MIMO systems is hybrid beam-forming (HB) using analog precoding at RF and digital precoding at the baseband. Researchers have studied HB, assuming optimal antenna implementation, ideal environment, and full rank effective channel.
Mohammed Alarfaj, Huaping Liu 0002
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Hybrid Diversity Maximization Precoding for the Multiuser MIMO Downlink
2011 IEEE International Conference on Communications (ICC), 2011In this paper, we present a high-performance hybrid linear precoding scheme for the downlink of multiuser multiple-input multiple-output (MU-MIMO) systems based on the combination of an iterative modified regularized block diagonalization (IMRBD) precoding and minimum mean square error (MMSE) precoding.
Farhan Khalid, Joachim Speidel
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Hybrid precoder for massive MIMO systems with coverage constraint
2015 IEEE/CIC International Conference on Communications in China - Workshops (CIC/ICCC), 2015Hybrid architecture has been shown to be cost effective for massive multi-input multi-out (MIMO) systems, where analog precoder is used to form narrow beams towards users for data transmission with reduced number of radio frequency chains. However, besides the user-specific data, a wideband massive MIMO system needs to broadcast control signaling ...
Lingxiao Kong +2 more
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On the Quantization of Phase Shifters for Hybrid Precoding Systems
IEEE Transactions on Signal Processing, 2017Hybrid precoding that combines analog RF processing and digital baseband processing has been shown to be a promising technique for transceivers with limited number of RF chains. The RF processing, due to power and complexity issue, is typically done by using phase shifters.
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Hybrid Spectral Precoding/Windowing for Low-Latency OFDM
2017 IEEE 85th Vehicular Technology Conference (VTC Spring), 2017In this paper we present a joint precoded and windowed OFDM system. This new hybrid method provides flexibility to suppress the out-of band (OOB) emission in non-contiguous OFDM systems used in cognitive radio. This method also provides the possibility of shortening the cyclic prefix without sacrificing the OOB emission or increasing the additional ...
Tayebeh Taheri +2 more
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Hybrid MMSE precoding for mmWave multiuser MIMO systems
2016 IEEE International Conference on Communications (ICC), 2016Millimeter-wave (mmWave) communication has emerged as one of the most promising technologies to deal with the increasing demand in data transmissions over wireless networks. However, due to the propagation characteristic at the mmWave band, much higher pathloss is observed compared to the commonly-used microwave band.
Duy H. N. Nguyen +2 more
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Hybrid Precoding/Combining for Massive MIMO with Hybrid ARQ
2018Because of poor channel conditions, correct reception at a certain target data rate can sometimes become impossible. Therefore, packet retransmission protocols are used in modern wireless communications systems to improve the reliability of data transmission.
Tho Le-Ngoc, Ruikai Mai
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Hybrid Multi-User Precoding with Amplitude and Phase Control
2018 IEEE International Conference on Communications (ICC), 2018There has been a strong interest in understanding hybrid precoding tradeoffs for millimeter wave (mmW) multi-input multi-output (MIMO) systems. A common assumption in most of these works is that the analog part of the hybrid precoder can only be designed with phase shifters. The consequent search for analog and digital precoding matrices is solved with
Miguel R. Castellanos +6 more
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