نتایج جستجو برای: precoding

تعداد نتایج: 2043  

1999
Nader Sheikholeslami Peter Kabal

A linear time varying precoding structure for data transmission over ISI channels is investigated. This precoding sc heme is capable of stabilizing the inverse channel lter without increasing the dynamic range of the receiv ed information symbols. This is particularly useful if the receiver decision device is a simple slicer with xed number of levels.

Journal: :IEICE Transactions 2010
Ian Dexter Garcia Kei Sakaguchi Kiyomichi Araki

A Gaussian MIMO broadcast channel (GMBC) models the MIMO transmission of Gaussian signals from a transmitter to one or more receivers. Its capacity region and different precoding schemes for it have been well investigated, especially for the case wherein there are only transmit power constraints. In this paper, a special case of GMBC is investigated, wherein receive power constraints are also i...

2002
Robert F.H. Fischer Christoph Windpassinger Alexander Lampe Johannes B. Huber

This paper extends the results of [3] and presents a modified version of Tomlinson-Harashima type precoding applicable to a setting with decentralized receivers, e.g., in a DS-CDMA downlink scenario. Precoding, i.e., nonlinear pre-equalization, is an interesting strategy for significantly simplifying signal processing at the receiver side (mobile terminals) at only moderate additional complexit...

1995
Robert Fischer

Flexible precoding was proposed for channel pre-equalization at the transmitter side. In this paper, a slight modification of the receiver is presented which enables the use of flexible precoding for channels with spectral nulls at DC and/or the Nyquist frequency. Simulation results covering the performance are given.

2016
DHARTI PATEL

In this paper, we consider the design of linear precoding in MIMO (multiple input multiple output) PLC (power line communication) system. For that, first we considered mutual information of MIMO-PLC system with impulsive noise. Here we proposed a novel approach to design the precoding scheme for MIMO-PLC system to increase (improve) performance in terms of maximizing mutual information value wi...

2017
Imad A Shaheen Abdelhalim Zekry Fatma Newagy Reem Ibrahim

Filter bank multicarrier (FBMC) system support better spectral efficiency and high data rate compared to OFDM system. However, the capacity of FBMC system can be increased significantly by occupying Multiple Input and Multiple Output MIMO system. The combination of MIMO and FBMC system may be used for next communication system 5G to support high spectral efficiency. The major disadvantage of FB...

Journal: :EURASIP J. Adv. Sig. Proc. 2008
Yang Xu Tho Le-Ngoc

Zero-forcing (ZF) precoding scheme can achieve the asymptotic sum capacity as dirty-paper coding (DPC) in multiple-input multiple-output broadcast (MIMO-BC) channel when the number of users, K , approaches infinity. However, the gap between ZF and DPC is not negligible in a practical range of K , that is, K ≤ 100. The capacity loss is partly due to the excessive transmission power penalty incur...

1998
German S. Feyh

The nonlinear write process of magnetic recording allows to write the symbols 1 only. The magnetic channel is a di erentiating channel. The locations of the transitions from +1 to -1 and vice versa in the input signal to the magnetic channel are important for the received waveform. This paper de nes a noise enhancement constrained, nite dimensional equalizer. This equalizer trades some misequal...

2003
Christoph Windpassinger Tomás Vencel Robert F. H. Fischer

In this paper we consider transmission over MIMO channels with channel state information available at the transmitter. This enables the use of precoding as well as an optimization of rate and power distribution over the parallel subchannels in the transmission system (loading). We show that spatial loading provides substantial gains and give a revised version of the V-BLAST algorithm to calcula...

2014
Jiang Jing Xu Zheng

To acquire the maximal array gain and mitigate the impact of pilot contamination, the downlink precoding algorithm on Max-SINR criterion was investigated and improved for Massive MIMO system. The objective function assured to maximize the utilization rate of the transmission power under the condition that SINR is not lower than the desired threshold. The Lagrangian function was deduced accordin...

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