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viterbi
- 卷积码的译码方法主要有两种:代数译码和概率译码。代数译码是根据卷积码的本身编码结构进行译码,译码时不考虑信道的统计特性。概率译码在计算时要考虑信道的统计特性。典型的算法如:最大似然译码、Viterbi译码、-Convolutional Decoding by two major ways : Decoding algebra, probability and decoding. Decoding is based on algebraic Convolutional Codes itself c
BCJR_turbo
- Turbo码的BCJR 算法 将通过观察离散无记忆信道(DMC) 中的M arkov 信源的接收序列, 经过计算, 给出每符号(状态) 最小 差错概率的符号(状态) 序列。-Turbo Codes BCJR algorithm by observing without discrete memory accesses (DMC), M arkov source reception sequence, calculated, given every sign (state), the
XMODEM.C
- 这是XMODEM传输协议原代码,测试只能证明错误的存在,而不能表明程序中没有错误。 测试的两个作用是:确定程序中缺陷的存在;有助于判断该程序在实际上是否可用。 软件测试最困难的问题之一是知道何时停止测试(When to stop testing? ) 自己测试自己的程序是不可能的。 当一个软件被测出的缺陷数目增加时,更多的未被发现的缺陷存在的概率也随之增加。 -This XMODEM transfer protocol source code, the test can o
cm_bpske
- 这是一个BPSK仿真程序,可以在给定信道信噪比下计算BPSK系统的差错概率。-BPSK This is a simulation program that can be given Channel SNR calculation BPSK system error probability.
channelcoding
- 通过给定符号的概率对其进行相应的信道编码-Through the probability of a given symbol to its corresponding channel coding
Huffman_code
- 经典的Huffman编码,给定概率向量,输出相应Huffman编码-Classic Huffman encoding, given the probability vector, the output corresponding Huffman coding
coded
- awgn信道下,卷积编码与M-QAM调制相结合的系统分组错误概率与信噪比的函数关系的matlab仿真程序-awgn channel, convolutional coding and M-QAM modulation system, the combination of packet error probability and SNR is a function of the matlab simulation program
xinxinlun
- 自适应算术编码,可以实现根据当前输入的码元自动调节概率,大大提高通信传输效率。-Adaptive arithmetic coding, can be achieved according to the current input symbol automatically adjust the probability, greatly improve the communication transmission efficiency.
turbo_MAP_Prob
- 用概率计算实现turbo译码源程序,再普通turbo译码上改变译码速度和收敛速度-Turbo decoding with source probability to achieve, and then change the normal turbo decoding speed and decoding speed of convergence
8psk
- (1) 分析QPSK调制、解调原理,并画出其系统框图; (2) 产生等概率且相互独立的二进制序列,作为待传输的信号,并画出其波形; (3) 进行8PSK调制,分别画出I、Q两支路信号经过乘法器后的波形以及8PSK调制波形; (4) 产生均值为0,方差为1的加性高斯随机噪声,画出其时域波形及频谱; (5) 将加性高斯随机噪声作为传输信道的干扰,画出接收端信号的时域图; (6) 进行8PSK解调,输出解码序列,画出解调后信号波形; (7) 计算系统信噪比、传输误码率。-(1)
compare_RS-PA_twoway
- 双向协作通信下,基于最小化中断概率,功率分配和中继选择技术研究对比图。-Two-way cooperative communication, based on minimizing the outage probability, power allocation and relay selection technology comparison chart.
renzhiweuxiandianzip
- 关于认知无线电频谱检测中能量检测的程序,并绘制虚警概率和检测概率之间的关系。-On energy detection in cognitive radio spectrum detection method, the relationship between the probability of false alarm and detection probability.
New-program
- mimo仿真,在matlab软件中,仿真出无线信道及相关的能量,包括信号经过中继,重发之后,最后求得系统的信道容量和中断概率-MIMO SIMULATION
alpha-matlab
- Alpha稳定分布的分布函数计算 产生alpha稳定稳定分布的概率密度函数-Alpha-stable distribution produced alpha stable distribution function of the probability density function of stable distribution
EnergydetectionZhengCe
- 基于能量检测法的matlab程序,很简单,讨论了在不同虚警概率下检测概率的变化和信噪比的要求,自己编的-Based on energy detection method matlab program, very simple, discusses the different detection probability of false alarm probability changes and SNR requirements, own ...
rr
- 给出了 =10 dB时三种方案的中断概率随传输速率R变化的情况,由图可以看出,速率R越小,中断概率越小,且本文建议的方案在相同传输速率情况下,中断概率最小-Outage probability given the situation with the transmission rate R = 10 dB change when the three programs, it can be seen from the figure, the smaller the rate R, the outa
ALOHA
- 这是防撞多的 aloha 算法,通过其吞吐量它测量传输企图乘以成功的概率-This is pure aloha algorithm, through its throughout, it measured transmission attempt multiplied by the probability of success
HuffmanEncode
- 赫夫曼编码的具体方法:先按出现的概率大小排队,把两个最小的概率相加,作为新的概率 和剩余的概率重新排队,再把最小的两个概率相加,再重新排队,直到最后变成1。每次相 加时都将“0”和“1”赋与相加的两个概率,读出时由该符号开始一直走到最后的“1”, 将路线上所遇到的“0”和“1”按最低位到最高位的顺序排好,就是该符号的赫夫曼编码。-Huffman Coding