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Description: 几何均值分解程序，mmse和zf预编码参考程序。-Geometric mean decomposition process, mmse and zf Precoding reference program.
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Size: 1024 |
Author: 潘雷 |
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Description: This paper introduces linear constellation precoding
(LCP) for OFDM transmissions over frequency-selective
fading channels. Exploiting the correlation structure
of OFDM subchannels, and choosing system parameters
properly, we first perform optimal subcarrier grouping
to divide the set of correlated subchannels into subsets.
Within each subset, a non-redundant constellation-specijic
unitary precoder is then designed to achieve maximum
multipath diversity and coding gains. While greatly reducing
the decoding complexity and simplifiing the LCP
design, subcarrier grouping offers optimal perjormance by
maximizing multipath diversity and coding gains. In addition,
the proposed system does not sacrifice the transmission
rate. Analytic evaluation and corroborating simulations
reveal its pe$ormance merits.
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Size: 460800 |
Author: ashish |
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Description: In this paper, we study Spatial Tomlinson-Harashima
Precoding (STHP). We propose a generalization of the
original structure of STHP which enables different transmission
power per antenna. The main advantage of the new scheme is
that it has a scalable structure because, despite of the variable
power per transmitter (even if some transmitters are switched
off), the precoding structure and its properties are preserved.
Next, we formulate the maximum achievable rates problem for
GSTHP and solve it numerically. In addition, we show that the
problem can be quasi-optimally solved in a closed form in a
limit case, or if some approximations are done. The solution is
found to be an antenna-selection algorithm with uniform power
allocation among the active transmitters. We finally present some
simulation results and conclusions.
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Size: 447488 |
Author: ashish |
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Description: Abstract—2×2 unitary precoding based on receiver feedback
is applied alongside spatial multiplexing at the base station in
HSDPA (D-TxAA) when the mobile terminal supports MIMO
transmissios [1]. This precoding will influence achievable sumrate
of the MIMO channel if it influences the Signal-to-
Interference-plus-Noise Ratio (SINR) of streams at the receiver
(RX) output. We propose a set of MIMO HSDPA receivers, all
based upon a LMMSE chip-level matrix filter (equalizer) front
end, and introduce the notion of joint bias for the MIMO chip
equalizer. Statistical properties of the spatial model thus obtained
are exploited to analyze the performance of proposed MIMO
receivers. It is shown that precoding choice depends upon the
MIMO receiver and the extent of its impact depends on the
MIMO RX.
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Size: 195584 |
Author: ashish |
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Description: 基于SLNR准则的MIMO下行链路预编码-SLNR criteria based precoding MIMO downlink
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Size: 79872 |
Author: 楼信谊 |
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Description: 4一种OFDM中继系统的有限反馈预编码方法.pdf-4 limited feedback precoding method for OFDM relay system. Pdf
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Size: 283648 |
Author: wang |
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Description: the pdf entitled The Modulo Lattice Channel The Key Feature in Precoding is attached-the pdf entitled The Modulo Lattice Channel The Key Feature in Precoding is attached
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Size: 762880 |
Author: reza |
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Description: Antenna arrays will be an important ingredient in millimeter wave (mmWave) cellular systems.
A natural application of antenna arrays is simultaneous transmission to multiple users. Unfortunately,
the hardware constraints in mmWave systems make it difficult to apply conventional lower frequency
multiuser MIMO precoding techniques at mmWave. This paper develops low-complexity hybrid analog/digital precoding for downlink multiuser mmWave systems. Hybrid precoding involves a combination
of analog and digital processing that is inspired by the power consumption of complete radio frequency
and mixed signal hardware.
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Size: 3248128 |
Author: hadjidw |
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Description: Millimeter wave (mmWave) signals experience orders-of-magnitude more pathloss than the microwave signals currently used in most wireless applications. MmWave systems must therefore leverage
large antenna arrays, made possible by the decrease in wavelength, to combat pathloss with beamforming gain. Beamforming with multiple data streams, known as precoding, can be used to further
improve mmWave spectral efficiency. Both beamforming and precoding are done digitally at baseband in traditional multi-antenna systems.
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Size: 1037312 |
Author: hadjidw |
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Description: Precoding in Multi antenna and Multiuser
Communications
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Size: 368640 |
Author: khoi.dinhvan |
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Description: Precoding in Multi-Antenna
and Multi-User Communications
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Size: 456704 |
Author: khoi.dinhvan |
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Description: MULTI-USER MIMO DOWNLINK PRECODING
FOR USERS WITH MULTIPLE ANTENNAS
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Size: 608256 |
Author: khoi.dinhvan |
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Description: MRT precoding in downlink multi-user
MIMO systems
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Size: 1019904 |
Author: khoi.dinhvan |
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Description: A Simplified Massive MIMO Approach using Precoding
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Size: 360448 |
Author: khoi.dinhvan |
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