Results 141 to 150 of about 438 (174)
Some of the next articles are maybe not open access.
On the Optimality of Multiuser Zero-Forcing Precoding in MIMO Broadcast Channels
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009In 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
openaire +1 more source
Game-Based Zero-Forcing Precoding for Multicell Multiuser Transmissions
2011 IEEE Vehicular Technology Conference (VTC Fall), 2011This paper studies the precoding design in a multicell multiuser (MU) system with universal frequency-reuse using a game-based approach. Considered is a multicell system, where the MU downlink transmissions in each cell are facilitated by a multi-antenna base-station (BS).
Hung Nguyen-Le +2 more
openaire +1 more source
Regularized zero-forcing precoding with non-homogeneous user conditions
2014 IEEE Wireless Communications and Networking Conference (WCNC), 2014This paper is concerned with linear precoding designs in a multiuser downlink system. We consider a multiple-input single-output system with multiple single-antenna user-equipments (UE) experiencing non-homogeneous user conditions, including the channel strength and the background noise power. Assuming perfect knowledge of channel state information and
Duy H. N. Nguyen, Tho Le-Ngoc
openaire +1 more source
An Iterative Precoder Design for Successive Zero-Forcing Precoded Systems
IEEE Communications Letters, 2012Successive zero-forcing (SZF) is a precoding technique for broadcast channels that partially precancels the multiuser interference. Due to the residual interference, the optimal precoder design for SZF is difficult to find, and currently unknown. This letter proposes a suboptimal iterative precoder design for the sum rate maximization problem for SZF ...
openaire +1 more source
Improved zero-forcing linear precoder through tone suppression
2016 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2016For 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
openaire +1 more source
Performance analysis of underwater-wireless communication with zero forcing precoder
2017 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), 2017This 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 +3 more
openaire +1 more source
Distributed versus centralized zero-forcing precoding for multiceli OFDM systems
2011 IEEE GLOBECOM Workshops (GC Wkshps), 2011In 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 +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), 2013We 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 +2 more
openaire +1 more source
Zero-Forcing Based Limited Feedback Hybrid Precoding in mmWave Communications
2019 IEEE/CIC International Conference on Communications in China (ICCC), 2019By 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 +3 more
openaire +1 more source
Low Complexity Approximate Zero-Forcing Precoding for Massive MIMO Downlink
2018 IEEE International Conference on Communications (ICC), 2018Zero-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 +3 more
openaire +1 more source