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matlab
- 在数字通信系统中,滤波器是其中重要部件之一, 滤波器特性的选择直接影响数字信号的恢复。在数字信号接收中, 滤波器的作用有两个方面,第一是使滤波器输出有用信号成分尽可能强;第二是抑制信号带外噪声,使滤波器输出噪声成分尽可能小,减小噪声对信号判决的影响。
matlab
- 用matlab实现对语音信号的短时分析,包括清音和浊音的判决,基音周期的估计。
数字基带传输系统的MATLAB仿真实现
- 一个简单的数字基带传输系统的MATLAB仿真实现源代码,包括: 一、A/D转换 二、码型变换(AMI码) 三、随机噪声信道的MATLAB仿真实现 四、抽样判决的MATLAB仿真实现 五、码型反变换 六、D/A转换
viterbi_hard_soft_unquant.维特比译码三种判决类型的误码率曲线
- 本程序比较了维特比译码三种判决类型的误码率曲线,This program compares the three kinds of sentence types of Viterbi decoding the bit error rate curve of
关于无线通信系统中判决反馈均衡器设计文档
- 关于无线通信系统中判决反馈均衡器设计文档,很好的资料,On wireless communication systems in decision feedback equalizer design documents, very good information
DSSS.rar
- 一个四用户的扩频通信系统,扩频增益为N=16,采用Walsh码进行直接序列扩频,BPSK调制,无线信道为AWGN(加性高斯白噪声信道)信道(AWGN信道:不考虑通信信道信号时,由宽频范围描述的统计随机无线噪声。)。在接收端进行解扩,解调,判决,通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。,A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct
tdpsolamatlab.rar
- 此程序在matlab环境下运行,是完整的tdpsola和fdpsola程序,包含了前期的语音读入,预处理,清浊音判决等等很全面,This procedure to run in matlab environment, is a complete program tdpsola and fdpsola include pre-read the speech, pre-processing, audio Qingzhuo comprehensive judgments, etc.
DSSS
- 设计一个有干扰的直接序列扩频通信系统, PN码由m序列产生器产生,经过高斯白噪声信道。在接收端接收到的信号包括“有用信号+高斯白噪声+干扰”,将接收信号进行解扩,判决,得到用户的信号检测结果,绘制不同的扩频增益(增益值为10,30,50)下,误比特率随信噪比Eb/N0的变化曲线。-Design of a direct sequence spread spectrum interference system, PN code generated by the m sequence generato
linear-DFE-MLSE-Equalizer
- Matlab程序,用于比较线性均衡器、判决反馈均衡器(DFE)、盲最大似然序列估计均衡器(MLSE)等误码率性能。-Matlab procedures used to compare the linear equalizer, decision feedback equalizer (DFE), Blind maximum likelihood sequence estimation equalizer (MLSE), such as bit error rate performance.
tcm_8psk_viterbi
- 通信中的8psk&tcm的体制研究,matlab源程序代码,采用viterbi译码方式,同时适用于软判决和硬判决两种方式-Communication 8psk & tcm institutional research, matlab source code, using viterbi decoding method applies to both soft-decision and hard decision in two ways
Convolutional_code
- 实现卷积码的BPSK调制、vitbi译码及软硬判决与未编码的BPSK误码率的对比-Convolutional codes to achieve BPSK modulation, vitbi hard and soft decision decoding and BPSK and uncoded BER comparison
my_QPSKmod_201107
- 从基带信号产生——IQ映射——调制——信道加噪——解调——判决及反映射——接收信号输出,每个步骤都画出了图形。 -From the baseband signal- IQ mapping- Modulation- channel with noise- modem- judgments and reflect radio- receiver signal output, each of these steps are drawn graphics.
snr_serMatlab
- 数字通信系统中采用基带传输和频带传输[ 1, 2 ] ,在抽样判决器之前,信号叠加了信道噪声. 本文利用 Matlab软件仿真[ 3, 4 ]分析了在判决器前叠加了高斯噪声后,信噪比与系统的误码率之间的关系.-Digital communication system using baseband transmission and band transmission [1, 2], in a sample before the decision device, the signal super
16qam_channel_encode
- 一、 本程序采用16QAM调制方式,对一串2进制信源进行调制,采用(7,4)循环码对信源做信道编码,用升余弦滚降函数进行基带调制,再调到高频信道;在信道上加入高斯白噪声,运用匹配滤波器解调,画出解调星座图,运用最小欧氏距离译码判决,再对信号进行信道解码,画出采用信道编码技术和不采用信道编码技术的误比特率图。-First, this program uses 16QAM modulation mode, for a string of two binary source is modulated,
16QAM_Viterbi_soft
- 通信中的TCM&16QAM源程序代码,开发环境matlab7.5 采用viterbi软判决译码-Communication TCM & 16QAM source code, development environment matlab7.5 using soft-decision viterbi decoding
viterbi
- 实现了卷积码的viterbi译码,软判决和硬判决均可实现,是从英文教学书上抄下来的。-Achieved viterbi decoding of convolutional codes, soft decision and hard decision can be realized, from the English teaching books, copied down.
decodeBitFlip
- LDPC在BPSK考虑AWGN信道下,采用软判决和积算法的仿真。这是第一个-LDPC in AWGN channel BPSK considering the introduction of soft-decision and the plot of the simulation algorithm. This is the first
Soft_dfe_simulator
- 软判决均衡算法,包括好几种软判决均衡算法及其性能比较-Soft-decision equalization algorithm, including several kinds of soft-decision equalization algorithm and its performance comparison
Viterbi
- 无线光通信;卷积交织;Viterbi并行译码 在误码率为10的负6次方 时,相对于最佳阈值 判决有约6.9dB的编码增益,与完美交织下的编码性能仅相差0.3dB-Wireless Optical Communication Convolutional Interleaver Viterbi decoding in parallel at the bit error rate of 10 negative 6 power when compared with the optimal
基于MATLAB的OFDM仿真设计实验报告
- 包含有数字通信课程实验大作业报告与代码。完成的OFDM的收发包含:1.卷积编码、2.自动增益控制、3.极大似然判决、4.QPSK收发、5.帧检测等,代码在MATLAB2016b环境下编译通过(It contains the report and code of the experiment assignment for the course of digital communication. The completed OFDM transceiver includes: 1. convolut