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Description: 一个OFDM系统的子载波分配算法
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Size: 8761 |
Author: zc07081136 |
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Description: 在高斯信道下，采用16QAM,维特比编码的64子载波的OFDM系统-the Gauss channel, using 16QAM, Viterbi encoding of the 64 subcarrier OFDM system
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Size: 6144 |
Author: 牛丽 |
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Description: OFDMA系统中子载波分配算法分析,移动通信相关的资料-OFDMA subcarrier allocation algorithm system neutron analysis, mobile communications-related information
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Size: 143360 |
Author: 陈辉 |
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Description: 在matlab中实现ofdm中子载波分配,希望对大家有用!-Matlab achieved in neutron OFDM subcarrier allocation, I hope useful for all of us!
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Size: 1024 |
Author: 侯祖磊 |
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Description:
正交频分复用是一种多载波宽带数字调制技术。相比一般的数字通信系统，
它具有频带利用率高和抗多径干扰能力强等优点，因而适合于高速率的无线通信系统。-
OFDM Simulator
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MIMO OFDM Simulator:
OFDM.m: OFDM Simulator (outer function)
create_channel.m: Generates a Rayleigh fading frequency-selective channel, parametrized by the antenna configuration, the OFDM configuration, and the power-delay profile.
svd_decompose_channel.m: Since full channel knowledge is assumed, transmission is across parallel singular value modes. This function decomposes the channel into these modes.
BitLoad.m: Apply the bit-loading algorithm to achieve the desired bit and energy allocation for the current channel instance.
ComputeSNR.m: Given the subcarrier gains, this simple function generates the SNR values of each channel (each singular value on each tone is a separate channel).
chow_algo.m: Apply Chow s algorithm to generate a particular bit and energy allocation.
EnergyTableInit.m: Given the SNR values, form a table of energy increments for
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Size: 184320 |
Author: 田静 |
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Description: ：该文研究OFDM 系统在总功率和误比特率限定下最大化传输速率的问题，并且考虑实际系统中整数比特的限制，
提出基于灌水法则的两种比特分配算法——改进贪婪算法和对分灌水线搜索法-The maximization of data rate under the constraint of total transmit power and bit error rate is a
considerable issue in OFDM system. Recognizing that the number of bits on each subcarrier must be a discrete
number for real systems, this paper proposed two bit allocation algorithm which are modified greedy algorithm
and water filling level binary searching algorithm.
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Size: 263168 |
Author: hodog |
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Description: 本文研究OFDM中最佳比特分配，试图在有限功率内达到传输比特最大化-This paper investigates subcarrier and power allocation
in multiuser OFDM. The aim is to maximize the overall
rate while achieving proportional fairness amongst users under
a total power constraint.
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Size: 168960 |
Author: hodog |
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Description: 代码包含的主要内容是AWGN信道上BPSK,QPSK,16QAM的调制解调，以及误码率计算过程，其中还有OFDM调制在信道上传输的仿真内容-Code contains the main contents of AWGN channel BPSK, QPSK, 16QAM modulation and demodulation, and bit error rate calculation process, in which there are OFDM modulation in the channel transmission simulation content
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Size: 13312 |
Author: 吕思达 |
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Description: Matlab file for simulating a cyclic-prefix (CP) orthogonal-frequency-
division-multiplexing (OFDM) system with binary phase-shift keying (BPSK)
modulation on each subcarrier. CP-OFDM system includes a repetition code
and interleaving across subcarriers as well as a Rayleigh-fading channel
model with exponentially decaying power profile.-Matlab file for simulating a cyclic-prefix (CP) orthogonal-frequency-
division-multiplexing (OFDM) system with binary phase-shift keying (BPSK)
modulation on each subcarrier. CP-OFDM system includes a repetition code
and interleaving across subcarriers as well as a Rayleigh-fading channel
model with exponentially decaying power profile.
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Size: 2048 |
Author: 王勇 |
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Description: OFDM同步技术，对于OFDM的子载波分配和同步进行了详细的介绍，对于OFDM的学习有很大的帮助。-OFDM Synchronization for OFDM subcarrier allocation and synchronization of a detailed description of the study for OFDM is very helpful.
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Size: 10348544 |
Author: 李坤域 |
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Description: 这里是课程设计时做的一个MATLAB-SIMULINK环境下OFDM的仿真源程序，采用16QAM的子载波调制系统，高斯模拟信道，有误码率分析以及星座图，希望对大家有所帮助-Here is a program designed to do a MATLAB-SIMULINK environment, OFDM simulation source code, using 16QAM subcarrier modulation system, Gaussian analog channel, with bit error rate analysis and the constellation, we want to help
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Size: 11264 |
Author: 苏鹏 |
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Description: — Performance comparison of multiuser OFDM-TDMA and
OFDMA systems by considering physical and link cross-layer behavior
is conducted in this work. We provide a new framework for performance
evaluation that centers on “ scheduling” with several different
subcarrier/bit allocation schemes. The performance metrics include: the
bit rate, the bit error rate (BER), packet throughput and delay. The
instantaneous channel conditions of users are assumed to be available
at the base station, which can be achieved by channel estimation at the
mobile terminal (MT), and then fed back to the base station through
a control channel. To perform the link layer comparison, we model the
Rayleigh fading channel with a nite-state Markov chain, and adopt the
M/G/1 queueing model as the analytical tool. Computer simulation is
performed to verify conducted analytical results-— Performance comparison of multiuser OFDM-TDMA and
OFDMA systems by considering physical and link cross-layer behavior
is conducted in this work. We provide a new framework for performance
evaluation that centers on “ scheduling” with several different
subcarrier/bit allocation schemes. The performance metrics include: the
bit rate, the bit error rate (BER), packet throughput and delay. The
instantaneous channel conditions of users are assumed to be available
at the base station, which can be achieved by channel estimation at the
mobile terminal (MT), and then fed back to the base station through
a control channel. To perform the link layer comparison, we model the
Rayleigh fading channel with a nite-state Markov chain, and adopt the
M/G/1 queueing model as the analytical tool. Computer simulation is
performed to verify conducted analytical results
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Size: 166912 |
Author: alaa |
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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: 利用贪婪算法对ofdm系统进行子载波和功率分配，在误码率一定的情况下，是发射端的功率最低-Greedy algorithm using ofdm system subcarrier and power allocation, bit error rate in certain circumstances, is the minimum transmitter power
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Size: 1024 |
Author: 曹欢 |
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Description: 在空时分组码的MIMO-OFDM系统条件下，对信道，子载波，比特和功率进行分配，仿真结果表明，系统有良好的吞吐量性能-Space-time block codes in MIMO-OFDM system under the conditions of the channel, subcarrier, bit, and power allocation, simulation results show that the throughput of the system has good performance
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Size: 308224 |
Author: 曹欢 |
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Description: As a multi-carrier modulation scheme, Orthogonal Frequency Division Multiplexing (OFDM)
technique can achieve high data rate in frequency-selective fading channels by splitting a
broadband signal into a number of narrowband signals over a number of subcarriers, where
each subcarrier is more robust to multipath. The wireless communication system with multiple
antennas at both the transmitter and receiver, known as multiple-input multiple-output
(MIMO) system, achieves high capacity by transmitting independent information over different
antennas simultaneously. The combination of OFDM with multiple antennas has been
considered as one of most promising techniques for future wireless communication systems.
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Size: 2609152 |
Author: ashish |
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Description: 128 subcarrier ofdm simulink model
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Size: 12288 |
Author: chensi |
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Description: 该文档为一个实现ofdm子载波调制和解调的代码，利用QPSK和16QAM两种方式实现，并附有运行结果。-This document is an implementation of ofdm subcarrier modulation and demodulation of the code, the use of QPSK and 16QAM two ways, along with operating results.
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Size: 109568 |
Author: 李路通 |
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Description: 多输入多输出正交分频多工模拟器。
正交分频多工:OFDM模拟器(外层函数)
create_channel:产生一个瑞利衰落信道复用,解的天线配置、正交分频多工结构、power-delay档案。
svd_decompose_channel:既然全网络知识是假设,在并行传输奇异值模式。这个函数分解这些频道模式。
BitLoad:适用bit-loading算法来实现预期的钻头和能量
-MIMO OFDM Simulator:
OFDM.m: OFDM Simulator (outer function)
create_channel.m: Generates a Rayleigh fading frequency-selective channel, parametrized by the antenna configuration, the OFDM configuration, and the power-delay profile.
svd_decompose_channel.m: Since full channel knowledge is assumed, transmission is across parallel singular value modes. This function decomposes the channel into these modes.
BitLoad.m: Apply the bit-loading algorithm to achieve the desired bit and energy allocation for the current channel instance.
ComputeSNR.m: Given the subcarrier gains, this simple function generates the SNR values of each channel (each singular value on each tone is a separate channel).
chow_algo.m: Apply Chow s algorithm to generate a particular bit and energy allocation.
EnergyTableInit.m: Given the SNR values, form a table of energy increments for each channel.
campello_algo.m: Apply Campello s algorithm to converge to the optimal bit and energy allocatio
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Size: 14336 |
Author: liufan |
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Description: 改进的OFDM 子载波分配、功率分配 注水算法-Improved OFDM subcarrier allocation, power allocation, algorithm water
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Size: 9216 |
Author: vidan |
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