Description: M-file for simulating a QPSK transmitter by modulating with a pseudo random bit stream. A serial to parallel conversion of the pseudo random bit stream is performed with mapping of two bits per symbol. A cosine and sine carrier is configured and the I and Q symbols modulate these carriers. The I and Q carriers are combined and time and frequency domain plots are provided showing key waveforms at various positions in the QPSK transmitter.
-M-file for simulating a QPSK transmitter b y modulating with a pseudo random bit stream. A s erial to parallel conversion of the pseudo rand om bit stream is performed with mapping of two bi ts per symbol. A cosine and sine carrier is CBMs gured and the I and Q symbols Modulate these CARR IERS. The I and Q carriers are combined and a time nd frequency domain plots are provided showing key waveforms at various positions in the QPSK t ransmitter. Platform: |
Size: 2170 |
Author:xiaoying |
Hits:
Description: M-file for simulating a QPSK transmitter by modulating with a pseudo random bit stream. A serial to parallel conversion of the pseudo random bit stream is performed with mapping of two bits per symbol. A cosine and sine carrier is configured and the I and Q symbols modulate these carriers. The I and Q carriers are combined and time and frequency domain plots are provided showing key waveforms at various positions in the QPSK transmitter.
-M-file for simulating a QPSK transmitter b y modulating with a pseudo random bit stream. A s erial to parallel conversion of the pseudo rand om bit stream is performed with mapping of two bi ts per symbol. A cosine and sine carrier is CBMs gured and the I and Q symbols Modulate these CARR IERS. The I and Q carriers are combined and a time nd frequency domain plots are provided showing key waveforms at various positions in the QPSK t ransmitter. Platform: |
Size: 28915 |
Author:xiaoying |
Hits:
Description: M-file for simulating a QPSK transmitter by modulating with a pseudo random bit stream. A serial to parallel conversion of the pseudo random bit stream is performed with mapping of two bits per symbol. A cosine and sine carrier is configured and the I and Q symbols modulate these carriers. The I and Q carriers are combined and time and frequency domain plots are provided showing key waveforms at various positions in the QPSK transmitter.
-M-file for simulating a QPSK transmitter b y modulating with a pseudo random bit stream. A s erial to parallel conversion of the pseudo rand om bit stream is performed with mapping of two bi ts per symbol. A cosine and sine carrier is CBMs gured and the I and Q symbols Modulate these CARR IERS. The I and Q carriers are combined and a time nd frequency domain plots are provided showing key waveforms at various positions in the QPSK t ransmitter. Platform: |
Size: 2048 |
Author:xiaoying |
Hits:
Description: M-file for simulating a QPSK transmitter by modulating with a pseudo random bit stream. A serial to parallel conversion of the pseudo random bit stream is performed with mapping of two bits per symbol. A cosine and sine carrier is configured and the I and Q symbols modulate these carriers. The I and Q carriers are combined and time and frequency domain plots are provided showing key waveforms at various positions in the QPSK transmitter.
-M-file for simulating a QPSK transmitter b y modulating with a pseudo random bit stream. A s erial to parallel conversion of the pseudo rand om bit stream is performed with mapping of two bi ts per symbol. A cosine and sine carrier is CBMs gured and the I and Q symbols Modulate these CARR IERS. The I and Q carriers are combined and a time nd frequency domain plots are provided showing key waveforms at various positions in the QPSK t ransmitter. Platform: |
Size: 28672 |
Author:xiaoying |
Hits:
Description: Simulation of a baseband 8PSK modulator - TX : a pseudo random bit stream generation, Serial to parallel conversion, 8PSK Mapping (Gray mapping), Signal power computation
- Channel : AWGN channel
- Plot constellations-Simulation of a baseband 8PSK modulator- TX : a pseudo random bit stream generation, Serial to parallel conversion, 8PSK Mapping (Gray mapping), Signal power computation
- Channel : AWGN channel
- Plot constellations Platform: |
Size: 2048 |
Author:IMM |
Hits:
Description: Codes".
Huffman coding uses a specific method for choosing the representation for each symbol, resulting in a prefix code (sometimes called "prefix-free codes") (that is, the bit string representing some particular symbol is never a prefix of the bit string representing any other symbol) that expresses the most common characters using shorter strings of bits than are used for less common source symbols. Huffman was able to design the most efficient compression method of this type: no other mapping of individual source symbols to unique strings of bits will produce a smaller average output size when the actual symbol frequencies agree with those used to create the code. A method was later found to do this in linear time if input probabilities (also known as weights) are sorted.-Codes".
Huffman coding uses a specific method for choosing the representation for each symbol, resulting in a prefix code (sometimes called "prefix-free codes") (that is, the bit string representing some particular symbol is never a prefix of the bit string representing any other symbol) that expresses the most common characters using shorter strings of bits than are used for less common source symbols. Huffman was able to design the most efficient compression method of this type: no other mapping of individual source symbols to unique strings of bits will produce a smaller average output size when the actual symbol frequencies agree with those used to create the code. A method was later found to do this in linear time if input probabilities (also known as weights) are sorted.
Platform: |
Size: 1024 |
Author:muhammad |
Hits:
Description: % QAMModem.m程序清单
% 仿真4比特原始数据与星座图的编码映射过程；
% 完成16QAM信号的调制解调；
% 基带信号符号速率 ps ＝1Mbps；
% 成形滤波器的滚降因子 a=0.8；
% 载波信号频率fc=2MHz ；
% 采样频率 Fs=8MHz ；
% 绘制16QAM信号的频谱及时域波形；
% 采用相干解调法仿真其解调过程；
% 绘制解调前后的基带信号时域波形；
% 将原始基带数据、QAM已调数据、滤波器系数写入相应的文本文件中。
clc;(%Qammodem. M program list
%The coding mapping process of 4-bit original data and constellation is simulated;
%Complete the modulation and demodulation of 16QAM signal;
%Baseband signal symbol rate PS = 1Mbps;
%Roll off factor of shaping filter a = 0.8;
%Carrier signal frequency fc = 2MHz;
%Sampling frequency FS = 8MHz;
%Draw the spectrum and time domain waveform of 16QAM signal;
%The coherent demodulation method is used to simulate the demodulation process;
%Time domain waveform of baseband signal before and after demodulation is drawn;
%Write the original baseband data, QAM adjusted data and filter coefficient into the corresponding text file.) Platform: |
Size: 4096 |
Author:yinying |
Hits:
Search - Bit-to-symbol mapping