Description: Algorithms for the estimation of a channel whose
impulse response is characterized by a large number of zero
tap coefficients are developed and compared. Platform: |
Size: 410258 |
Author:joe chen |
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Description: 信道仿真的很好程序，可以实现不同参数情况下的信道仿真，比如超宽带系统的室内多径环境信道仿真-channel simulation is a good procedure, can be achieved under different parameters of the channel simulation. For example, UWB system indoor multi-path channel simulation environment Platform: |
Size: 7168 |
Author:赵玲 |
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Description: 产生IEEE802。15。3A信道的冲击响应，调整参数可以仿真四种不同的情况-have IEEE802. 15. 3A channel impulse response. Simulation parameters can be adjusted to four different kinds of Platform: |
Size: 3072 |
Author:李哲 |
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Description: Algorithms for the estimation of a channel whose
impulse response is characterized by a large number of zero
tap coefficients are developed and compared.-Algorithms for the estimation of a channel whoseimpulse response is characterized by a large number of zerotap coefficients are developed and compared. Platform: |
Size: 410624 |
Author: |
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Description: 11.txt为产生信道冲激响应的源码，
22.txt为各种OFDM信道估计算法的源码-11.txt for producing channel impulse response of the source, 22.txt for a variety of OFDM channel estimation algorithm for the source Platform: |
Size: 2048 |
Author: |
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Description: 仿真一个瑞利衰落信道的信道冲激响应，横坐标是信道采样阶数，纵坐标是对应采样阶数的幅值.-Simulation of a Rayleigh fading channel the channel impulse response, the abscissa is the order of channel sampling, corresponding ordinate is the amplitude of the order of sampling. Platform: |
Size: 1024 |
Author:yanyan |
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Description: 多径连续时变信道,是matlab代码,m文件,可用于HiperLan2,WLAN,WiFi仿真.是外国人论文上的.-Generating the channel impulse response of a time-varying
channel according to a Jake s doppler channel model Platform: |
Size: 2048 |
Author:天天 |
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Description: This matlab code generates UWB indoor channel impulse response described in :
Cassioli, D. Win, M.Z. Molisch, A.F., "The ultra-wide bandwidth indoor channel: from statistical model to simulations," Selected Areas in Communications, IEEE Journal on , vol.20, no.6, pp. 1247-1257, Aug 2002
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=1021916&isnumber=21989
All parameters of the channel were taken from the reference paper
-This matlab code generates UWB indoor channel impulse response described in :
Cassioli, D. Win, M.Z. Molisch, A.F., "The ultra-wide bandwidth indoor channel: from statistical model to simulations," Selected Areas in Communications, IEEE Journal on , vol.20, no.6, pp. 1247-1257, Aug 2002
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=1021916&isnumber=21989
All parameters of the channel were taken from the reference paper
Platform: |
Size: 38912 |
Author: |
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Description: In this paper, a novel demodulation structure in
high-frequency (HF) channel is introduced and studied.Frequency-offset estimation, ractionally spaced adaptive equalization and carrier recovery techniques are involved.Frequency-offset correction is carried out based on channel impulse response estimation. ractionally spaced adaptive equalization and carrier recovery are combined with nonlinear decision feedback loop structure and the initial value
of tap coefficients of equalization are obtained from the previous channel estimation. Simulation is conducted under channel parameters with respect to MIL-STD-188-110B using a Monte Carlo technique. The results show this novel demodulation structure is feasible and efficient in HF channel, the symbol error ratio can reach to 10− 3 in 12dB SNR.-In this paper, a novel demodulation structure in
high-frequency (HF) channel is introduced and studied.Frequency-offset estimation, ractionally spaced adaptive equalization and carrier recovery techniques are involved.Frequency-offset correction is carried out based on channel impulse response estimation. ractionally spaced adaptive equalization and carrier recovery are combined with nonlinear decision feedback loop structure and the initial value
of tap coefficients of equalization are obtained from the previous channel estimation. Simulation is conducted under channel parameters with respect to MIL-STD-188-110B using a Monte Carlo technique. The results show this novel demodulation structure is feasible and efficient in HF channel, the symbol error ratio can reach to 10− 3 in 12dB SNR. Platform: |
Size: 186368 |
Author:Lin |
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Description: 超宽带信道模型的四种方案下的冲激响应源程序及其绘图-Ultra-wideband channel model of the four impulse response under the program source code and graphics Platform: |
Size: 1024 |
Author:孙丽霞 |
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Description: Designs a frequency-domain and time-domain FIR equalizer for
a single-input single-output (SISO) channel.
Frequency-domain equalization uses a Chebychev criteria and
is specified in terms of frequency response functions.
It is a convex problem (which can be formulated as an SOCP):
-
where H is the frequency response function and our variable
is the filter impulse response h. Function G is the unequalized
frequency response and G_des is the desired freq response.
Time-domain equalization immediately designs the impulse
response function by specifying the problem in time (it s an LP):
minimize max_{t neq D} |g_tilde(t)|
s.t. g_tilde(D) = 1
Platform: |
Size: 1024 |
Author:wwcj |
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Description: 由于通常的通信信道的冲激响应的稀疏性，使得NLMS算法的收敛速度还有待提高。所以，近年来，有学者提出了成比例的归一化的均方误差算法(PNLMS)。PNLMS在自适应过程的开始阶段有着很快的收敛的速度，但是迭代过程越往后，收敛速度越慢。于是，众多学者提出了许多的改进算法。本程序是通过matlab仿真对近年来流行的PNLMS,IPNLMS,MPNLMS等算法进行的仿真程序-As usual communication channel impulse response sparse, making the convergence rate of NLMS algorithm to be improved. Therefore, in recent years, some scholars have proposed a proportional to the normalized mean square error algorithm (PNLMS). PNLMS the beginning of the adaptive process has a fast convergence speed, but the more backward iterative process, convergence slower. Thus, many scholars have made many improvements in algorithms. Matlab simulation of this program is popular in recent years PNLMS, IPNLMS, MPNLMS other algorithms of the simulation program Platform: |
Size: 8192 |
Author:龚霞 |
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Description: This paper compares performance of nite impulse
response (FIR) adaptive linear equalizers based on the recursive least-squares (RLS) and least mean square(LMS) algorithms in nonstationary uncorrelated scattering wireless channels. Simulation results, in terms of steady-state
mean-square estimation error (MSE) and average bit-error rate (BER) metrics, are found for the frequency selective Rayleigh fading wireless channel experienced in a mobile ad hoc network where nodes are lognormally shadowed from each other. For the nonstationary channel models considered, RLS is always found to outperform LMS. Platform: |
Size: 844800 |
Author:almoudamer3 |
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Description: LMMSE估计就是MMSE算法的特例，通过求得一个合适的信道冲击响应（CIR），使得通过CIR计算出的接收数据与实际数据的误差的均方和最小。-LMMSE estimate is a special case of the MMSE algorithm, to obtain a suitable channel impulse response (CIR), so that the received data and the error of the actual data calculated by CIR and the minimum mean square. Platform: |
Size: 1024 |
Author:tata |
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Description: 通过matlab仿真了Saleh-Valenzuela 信道模型，仿真图有四个子图，（a）和（b）分别示出的分布的群集抵达时间和射线到达时间，（c）表示S-V信道的脉冲响应，（d）图显示了信道功率分配-Saleh-Valenzuela channel model by matlab simulation, simulation diagram there are four sub-chart, (a) and (b) respectively illustrated the distribution of cluster arrived in time and the ray reaches the time, (c), said the SV letter tract of the impulse response (d ) The figure below shows the distribution of channel power Platform: |
Size: 2048 |
Author:符青 |
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Description: We consider the design of a block equalizer for an
intersymbol interference channel, given that the channel impulse
response is not perfectly known at the receiver Platform: |
Size: 448512 |
Author:husamwedyan |
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Description: This paper investigates the Wiener and least
mean square (LMS) algorithms in the design of traversal tap
delay line filters for the purpose of compensating the effect of
the communication channel. The designed equalizers remove
the distortion caused by the channel from the transmitted
signal without requiring any specific model or state-space
information. The first approach is based on the a recursive
Wiener filtering procedure and is designed using the Wiener-
Hopf equation. On the other hand, the second approach uses
the LMS algorithm and investigates the effect of different
step sizes on the speed of the conversion and the accuracy of
the overall algorithm. Simulation results are presented and
both schemes are compared under different distortion levels
and signal to noise ratio(SNR) values via impulse response,
frequency response and ABER simulations. Platform: |
Size: 10759168 |
Author:nagarjun |
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Description: 图1为均衡带限信号所引起失真的横向或格型自适应均衡器(其中横向FIR系统长M=11), 系统输入是取值为±1的随机序列，其均值为零；参考信号；信道具有脉冲响应：
式中用来控制信道的幅度失真(W = 2～4, 如取W = 2.9,3.1,3.3,3.5等)，且信道受到均值为零、方差(相当于信噪比为30dB)的高斯白噪声的干扰。试比较基于下列几种算法的自适应均衡器在不同信道失真、不同噪声干扰下的收敛情况(对应于每一种情况,在同一坐标下画出其学习曲线):
1）横向/格-梯型结构LMS算法
2）横向/格-梯型结构RLS算法
并分析其结果。-Figure 1 is a band-limited signal caused balanced horizontal or lattice distortion adaptive equalizer (FIR system in which the lateral length M = 11), the system input is the value of a random sequence of ± 1, mean zero reference signal channel has impulse response:
Wherein the amplitude of the distortion for the control channel (W = 2 ~ 4, and so as to take W = 2.9,3.1,3.3,3.5), and subjected to a channel with zero mean and variance (equivalent SNR is 30dB) Gaussian white noise. Compare the following types of algorithm-based adaptive equalizer in a different channel distortion, the convergence of different noise interference (corresponding to each situation, draw their learning curve in the same coordinate):
1) landscape/grid- LMS algorithm ladder structure
2) landscape/grid- RLS algorithm ladder structure
And analyze the results. Platform: |
Size: 3072 |
Author:李丽红 |
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Search - impulse response of a channel