Results 171 to 180 of about 995,967 (198)

On the Optimality of Multiuser Zero-Forcing Precoding in MIMO Broadcast Channels

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009
In this paper, we consider a multiuser Gaussian broadcast channel where the base station and the users both are equipped with multiple antennas. The problem of optimal zero-forcing (ZF) precoding design subject to sum power constraint is discussed. Block diagonalization (BD) is applied as the ZF precoding method.
Saeed Kaviani, Witold A. Krzymien
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Improved zero-forcing linear precoder through tone suppression

2016 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2016
For a zero-forcing linear precoded system, the transmit power normalisation could severely degrade the achievable data rates. However selecting fewer number of users for pre-coding and signal transmission may require less severe transmit power normalisation, leading to improvement in the downstream data rates. We develop an algorithm here to select the
Shailendra Singh, Surendra Prasad
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Performance analysis of underwater-wireless communication with zero forcing precoder

2017 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), 2017
This paper is concerned with the performance analysis of a dual-hop random access network in underwater communication environment. Single gateway equipped with multiple antennas, and employing zero-forcing technique in a space division multiple access scenario, is connected a random number of independent sources which are hidden from their destination ...
Abdurrahman Alfitouri, Khairi Ashour Hamdi, Ammar Hadi, Makram Alkhaled   +3 more
openaire   +1 more source

Distributed versus centralized zero-forcing precoding for multiceli OFDM systems

2011 IEEE GLOBECOM Workshops (GC Wkshps), 2011
In this paper we propose distributed linear multiuser precoding techniques for the downlink of multicell MIMO-OFDM systems. The preceder is designed in two phases: first the intercell interference is removed by applying a set of precoding vectors based on zero-forcing criterion and computed in a distributed manner at each BS; then the system is further
Reza Holakouei, Adão Silva, Atílio Gameiro   +2 more
openaire   +2 more sources

Combined approach of zero forcing precoding and cooperative jamming: A secrecy tradeoff

2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013
We consider the problem of secret communication through cognitive relay assisted interference channels in which secondary user (SU) is allowed to transmit simultaneously with the primary user (PU) over the same channel instead of waiting for an idle channel which is traditional for a cognitive radio.
W. Liu, Md. Zahurul I. Sarkar, Tharmalingam Ratnarajah   +2 more
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Low Complexity Approximate Zero-Forcing Precoding for Massive MIMO Downlink

2018 IEEE International Conference on Communications (ICC), 2018
Zero-forcing (ZF) precoding plays an important role for massive MIMO downlink due to its near optimal performance in high signal-to- noise (SNR) region. However, the high computation cost of the involved matrix inversion hinders its application in practical large- scale systems. In this paper, we adopt the first order Neumann series (NS) expansion for a
Cheng Zhang 0004, Yindi Jing, Yongming Huang 0001, Luxi Yang   +3 more
openaire   +1 more source

A generalized zero-forcing precoder for multiple antenna Gaussian broadcast channels

2017 IEEE International Symposium on Information Theory (ISIT), 2017
In this paper, we consider precoder design for multiuser multiple-input-multiple-output (MIMO) Gaussian broadcast (BC) channels and propose a generalized zero-forcing (GZF) precoder based on successive dirty-paper coding (DPC), i.e., the GZF-DP precoder.
Sha Hu 0001, Fredrik Rusek
openaire   +1 more source

Precoding for Multiple Antenna Gaussian Broadcast Channels With Successive Zero-Forcing

IEEE Transactions on Signal Processing, 2007
In this paper, we consider the multiuser Gaussian broadcast channel with multiple transmit antennas at the base station and multiple receive antennas at each user. Assuming full knowledge of the channel state information at the transmitter and the different receivers, a new transmission scheme that employs partial interference cancellation at the ...
Amir D. Dabbagh, David James Love
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Impact of Limited Feedback on Multiple Relay Zero-Forcing Precoding Systems

2008 IEEE International Conference on Communications, 2008
In recent literature, it has been shown that in a relaying network utilizing multiple relay precoding, the signal-to- noise ratio (SNR) at each destination node will scale linearly with the number of relays K, which is referred to as the distributed array gain (DAG) K. Different from the prior studies which assume perfect channel state information (CSI)
Erlin Zeng, Shihua Zhu, Ming Xu
openaire   +1 more source

Zero-Forcing Based Limited Feedback Hybrid Precoding in mmWave Communications

2019 IEEE/CIC International Conference on Communications in China (ICCC), 2019
By exploiting angular sparsity that mmWave channels exhibit, limited feedback hybrid precoding (LFHP) can achieve high performance with a largely reduced system over-head. Most existing works focus on optimizing the system mutual information (SMI), where the receiver complexity is often neglected. More importantly, these SMI-oriented schemes provide no
Shijian Gao, Xiang Cheng 0001, Liuqing Yang 0001, Rongqing Zhang 0001   +3 more
openaire   +2 more sources