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文件来源: 我的毕设 仿真结果: 在窄带Rayleigh快衰落信道下几种检测方法的误码率性能比较 说 明: 参数tx,rx,L,EbN0可以根据需要更改。 tx,rx是收发天线数,根据需要取值就好了,一般研究2发2收和4发4收 EbN0是信噪比取值范围,根据需要选择吧。取得点多当然算得慢。 L影响结果的波动性和误码率所能达到的下限,L值取得越大图像越接近真实情况。如果 EbN0最大值有20dB那么误码率可以达到10负4次方建议L不低于10000。 使用方法: 把db.m和minnorm.m存进任意文件夹,然后打开matlab,File->Set Path->Add Folder加入 文件夹。在matlab中输入命令db即可
Date : 2008-10-13 Size : 5.42kb User : 恶魔

文件来源: 我的毕设 仿真结果: 在窄带Rayleigh快衰落信道下几种检测方法的误码率性能比较 说 明: 参数tx,rx,L,EbN0可以根据需要更改。 tx,rx是收发天线数,根据需要取值就好了,一般研究2发2收和4发4收 EbN0是信噪比取值范围,根据需要选择吧。取得点多当然算得慢。 L影响结果的波动性和误码率所能达到的下限,L值取得越大图像越接近真实情况。如果 EbN0最大值有20dB那么误码率可以达到10负4次方建议L不低于10000。 使用方法: 把db.m和minnorm.m存进任意文件夹,然后打开matlab,File->Set Path->Add Folder加入 文件夹。在matlab中输入命令db即可
Date : 2026-01-02 Size : 5kb User : 恶魔

在GSM通信系统中,Viterbi检测是一个及其重要的部分,许多的研究人员在这里花费了大量的心血。参考各种资料,我们总结得出以下Viterbi软输出算法,与传统的硬判决方法相比,可以提高2~3个db的增益:-In GSM communication systems, Viterbi detection is an important part of many researchers here spent a lot of effort. Reference to a variety of information, we summarize the following soft-output Viterbi algorithm, with the traditional hard-decision method, can be raised by 2 ~ 3 db gain:
Date : 2026-01-02 Size : 2kb User : 戴浩

PAM—DS发射机。包含了要产生的UWB信号的所有参数特性,以DB为单位的平均发射功率POW等-PAM-DS transmitter. Included to generate the UWB signal characteristics of all the parameters to DB for units such as the average transmission power POW
Date : 2026-01-02 Size : 1kb User : 李曼

利用M函数仿真扩频通信系统。6个用户的CDMA的同步通信系统,每个用户利用L=31的Gold码,进行扩频,信道为AWGN信道,接收端利用匹配滤波器进行检测。绘出当N=10000个发射比特下,SNR=0:15(dB)时的误码率曲线。 -M function simulation using Spread Spectrum Communication System. 6 simultaneous users of CDMA communication system, each user of the L = 31 the use of Gold codes for spread spectrum, channel for the AWGN channel, the receiving end to detect the use of matched filter. Drawn when N = 10000 bits of transmission, SNR = 0:15 (dB) when the bit error rate curve.
Date : 2026-01-02 Size : 1kb User : 沈友俊

clear all snrdB_min = 0 snrdB_max = 10 SNR (in dB)limits snrdB = snrdB_min:1:snrdB_max Nsymbols = input( Enter number of symbols > ) snr = 10.^(snrdB/10) convert from dB h = waitbar(0, SNR Iteration ) -clear all snrdB_min = 0 snrdB_max = 10 SNR (in dB)limits snrdB = snrdB_min:1:snrdB_max Nsymbols = input( Enter number of symbols > ) snr = 10.^(snrdB/10) convert from dB h = waitbar(0, SNR Iteration )
Date : 2026-01-02 Size : 1kb User : venkat

Create Rayleigh fading channel object Compute error rate for different values of SNR Range of SNR values, in dB values
Date : 2026-01-02 Size : 1kb User : mahmut

This a MATLAB based program that computes the: - Maximum directivity (dimensionless and in dB) - Radiation resistance (Rr) - Input resistance (Rin) - Reactance relative to current maximum (Xm) - Input reactance (Xin) - Normalized current distribution - Directivity pattern (in dB) in polar form - Normalized far-field amplitude pattern (E-theta, in dB) in polar form-This is a MATLAB based program that computes the: - Maximum directivity (dimensionless and in dB) - Radiation resistance (Rr) - Input resistance (Rin) - Reactance relative to current maximum (Xm) - Input reactance (Xin) - Normalized current distribution - Directivity pattern (in dB) in polar form - Normalized far-field amplitude pattern (E-theta, in dB) in polar form
Date : 2026-01-02 Size : 2kb User : Hamid

Number of transmitting antennas mR, Number of transmitting antennas ITER, number of trials SNRdB, Range of SNR in dB C SISO, variable for capacity of a SISO system C SIMO, variable fo
Date : 2026-01-02 Size : 4kb User : Ajay2529

程序是在不同信噪比情况下两跳协作通信系统分别采用AAF和DAF协议时接收端的误码率仿真主函数twohop.m以及一些子函数,假设信道时瑞利信道。S_R\R_D\S_D的传输距离是1米,调制方式是BPSK,信噪比在-15dB-15dB,接收端合并方式为ERC,迭代次数为1000(The program simulates the BER of the main function twohop. m and some sub-functions at the receiver when the two-hop cooperative communication systems adopt AAF and DAF protocols respectively under different signal-to-noise ratios, assuming the Rayleigh channel. The transmission distance of S_RRDS_D is 1 m, the modulation mode is BPSK, the signal-to-noise ratio is -15 dB-15 dB, the receiver combination mode is ERC, and the number of iterations is 1000.)
Date : 2026-01-02 Size : 17kb User : guokeDz
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