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he_fu_man_bian_ma
- 假设一个文件中出现了8种符号S0，SQ，S2，S3，S4，S5，S6，S7，那么每种符号要编码，至少需要3bit。假设编码成000，001， 010，011，100，101，110，111。那么符号序列S0S1S7S0S1S6S2S2S3S4S5S0S0S1编码后变成 000001111000001110010010011100101000000001，共用了42bit。我们发现S0，S1，S2这3个符号出现的频率比较大，其它符号出现的频率比较小，我们采用这样的编码方案：S0到S7的码辽分别01
54379
- We investigate the case of independent Rayleigh faded paths between antenna elements and find that with high probability extraordinary capacity is available. Compared to the baseline n = 1 case, which by Shannon’s classical formula scales as one
SERBER
- 用matlab 是实现qpsk的方针算法，并计算方针和理论的符号错误率和比特错误率~~请大家指正-Qpsk with matlab is to achieve the policy algorithm, and calculate the principle and theory of symbol error rate and bit error rate ~ ~ please correct me
parsesrc
- TExprCalc is a Delphi component written around the original Parser.dll. The original parser has been modified and the Symbol table changed to a TList. This made it possible to create the parser for 16 and 32 bit. It is no longer a DLL but an
Incomplete
- Add pilot symbols to the input data just before transmission 2. Implement cyclic prefix (CP), use 10 of symbol length. Divide the 64 input data points into 8-bit streams, generate and append the CP based on each symbol 3. Include complex
ofdm-qpsk-mycreatechannel
- 衡量一个数字通信系统性能好坏的指标很多，误码率性能就是一个重要的指标。误码率是指错误接收的码元数载传输总码元数中所占的比例。在该章中，我们将通过MATLAB仿真在发送平均功率和传输速率相同的情况下-A digital communication system performance measure indicators of good or bad a lot of bit error rate performance is an important indicator. Bit error r
Data-Transmission-over-Speech-Coded-Voice-Channels
- The voice channel in mobile communication systems have high priority and are almost always available. By using the voice channel also for data transmissions it is possible to get the same availability as for voice calls. But due to speech codecs
adder
- 这是一个用VHDL语言描述的8位带符号加法器,希望对大家有用-This is a descr iption using VHDL, 8-bit adder with a symbol, we want to be useful
ABlindEstimationAlgorithmforPNSequenceinDSSSSignal
- 这是一篇很好的有关信道估计的文章， 可以用来快速的了解信道估计的基本内容-In this paper, a method for fast blind estimation of DS-SS signal is proposed which aims at the Direct-Sequence Spread- Spectrum (DS-SS) signals with parameters unknown. Considering the characteristic th
OFDM_PSK_AWGN
- You can use it to simulation OFDM in BPSK,QPSK and 8PSK in AWGN channel.You can see the symbol error rate and bit error rate from these simulation.
leastsquare
- Inter-symbol interference if not taken care off may cause severe error at the receiver and the detection of signal becomes difficult. An adaptive equalizer employing Recursive Least Squares algorithm can be a good compensation for the ISI probl
bitallocate
- 通信系统关键技术仿真--比特加载算法 函数完成在给定子信道信息、误码率和码元速率的前提下子信道的比特分配。-Key technology communication system simulation- bit loading algorithm function to complete in a given sub-channel information, the error rate and symbol rate sub-channel under the premise of the
attachments_2011_01_20
- OFDM modulation produces higher Peak Average Power Ratio (PAPR) whenever the carriers in OFDM symbol add synchronously in the time domain resulting in higher signal power. This high power saturates the power amplifier placed in the RF section res
psk
- 完成M=4的PSK通信系统的蒙特卡洛仿真，信号波形为sbr2p(snr_in_dB) 求出以dB为单位的给定信噪比的比特误码率和符号误码率-Completion of M = 4 of the PSK communication system Monte Carlo simulation, the signal waveform is sbr2p (snr_in_dB) calculated in units of dB signal to noise ratio for a given bit
C
- C语言编程基础： 1、 十六进制表示字节0x5a：二进制为01011010B；0x6E为01101110。 2、 如果将一个16位二进数赋给一个8位的字节变量，则自动截断为低8位，而丢掉高8位。 3、 ++var表示对变量var先增一；var—表示对变量后减一。 4、 x |= 0x0f 表示为 x = x | 0x0f 5、 TMOD = ( TMOD & 0xf0 ) | 0x05 表示给变量TMOD的低四位赋值0x5，而不改变TMOD的高四位。 6、 While(
Pe_SNR
- 本次仿真研究多幅度电平信号误码率与信噪比之间的关系，系统框图如上。假设考虑8幅度电平，则根据流程首先需要用一个随机数发生器产生在(0,1)间的均匀随机数，然后将(0,1)区间均匀划分为(0,0.125)、(0.125,0.25)、(0.25,0.375)、(0.375,0.5)、(0.5,0.625)、(0.625,0.75)、(0.75,0.875)、(0.875,1)这些子区间，并分别对应于一个3bit符号000、001、010、011、100、101、110、111，接着分别映射到-7d、
jingnaicha
- 本程序用C语言在LSB上添加水印。最低有效位(LSB)是给这些单元值的一个二进制整数位位置，就是，决定是否这个数字是偶数或奇数。LSB有时候是指最右边的位，因为写较不重要的数字到右边位置符号的协定。它类似于一个十进制整数的最不重要的数字，它是在一个(最右边)位置的数字。-This program in C language to add a watermark on the LSB. The least significant bit (LSB) is a binary integer posi
QAM
- 编写一个含QAM传输的发送和接收模块 1)分别采用复基带仿真和实带通仿真两种形式 a) 实带通仿真时, 载波频率为符号率的4倍 b)发端采用滚降系数0.5的根号升余弦滤波器 2)画出Eb/N0=15dB时的接收波形(收滤波前),取100个采样 3)画出发端输出的眼图和收端过匹配滤波后的眼图(画眼图时不加噪声) 统计误符号率和误比特率与Eb/N0的关系,画出曲线, 与理论计算的曲线相对比 -Prepare to send of one with QAM transmis
gibbs
- 吉布斯定轨法。 输入：轨道上任意三个点的位矢(R1,R2,R3)； 输出：质点在R2端点时的速度V2；ierr是个判断符号，返回的ierr是零的话，就说明‘R1,R2,R3’共面，如果ierr是1的话说明‘R1,R2,R3’不共面(正常情 况下，要构成轨道的话，‘R1,R2,R3’一定共面 ，即ierr是零，如果ierr是1的话说明输入的‘R1,R2,R3’不共面不能构成轨道。 此函数用于：任意给定三个空间共面的向量，可以确定质点在R2处的速度V2，也就得到了轨道上的一个状态向
simulation_2psk
- 求出以dB为单位的给定比特信噪比的误符号率-Find the symbol error rate of a given bit signal-to-noise ratio in dB