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 |
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Description: Ｍ＝４正交信号时数字通信系统进行蒙特卡罗仿真程序，当均值分别等于０，０.１，１.０，２．０时完成１００００个比特的仿真并求出误比特概率。绘出理论误码率和蒙特拉罗仿真的差错率并进行比较这俩个结果，并绘出每个均值情况下判决器的１０００个接受信噪比抽样-M = 4 orthogonal signals in digital communication systems Monte Carlo simulation program, when the mean, respectively, equivalent to 10,000 completed 0,0.1,1.0,2.0 simulation bit and bit error probability are obtained. Mapping theory and蒙特拉罗BER simulation这俩error rate and compare results, and the mean circumstances of each mapped Platform: |
Size: 2048 |
Author:金玲 |
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Description: WLAN仿真－发送机
wlan No Comments
设置完系统参数后，开始产生发送数据。
1. 产生随机的发送bit（tx_bits），这里不考虑信道编码。
2. QAM映射
3. 将数据映射到不同载波，形成OFDM符号
4. 产生pilot，并将pilot插入OFDM符号中
5. 加入dc和guard子载波
6. 进行ifft，将频域信号变到时域，并加入循环前缀
7. 对信号进行overlap window
8. 在时域产生short preamble
9. 在时域产生long preamble
10. 将preamble和数据符号组成packet
11. 升采样
得到信道传输的数据Tx_signal_up
具体程序见附件 wlan_transmitter.m-WLAN Simulation- wlan No Comments transmitter system parameters set finished, the beginning to have to send data. 1. Have sent random bit (tx_bits), here does not consider channel coding. 2. QAM mapping 3. The data is mapped to a different carrier to form OFDM symbols 4. Have a pilot, and pilot inserted OFDM symbols 5. Adding dc and guard subcarriers 6. To carry out ifft, will change the frequency domain signal to time domain, and add cyclic prefix 7. the signals overlap window8. In the time domain have a short preamble9. In the time domain have a long preamble10. the preamble and data symbols packet11. or sampling received data transmission channel Tx_signal_up specific procedures see Annex wlan_transmitter.m Platform: |
Size: 1024 |
Author:福东方 |
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Description: 16psk通信系统的信噪比与误码率计算并绘图-16psk communication system signal to noise ratio and bit error rate calculation and mapping Platform: |
Size: 2048 |
Author:wubinbin |
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Description: 产生一段随机四进制信号，对其进行QAM调制后，送入加性高斯白噪声信道传输，用加法运算在已调信号叠加白噪声，模拟加性高斯白噪声信道对信号传输的影响，在接收端对信号进行相应解调，并与原始信号比较计算误码率。改变误差白噪声的功率，绘制信噪比与误码率曲线。并与同组其他同学的性能曲线比较各种调制方式的性能优劣。-For some randomly generated four-band signal, after its QAM modulation, into the additive white Gaussian noise channel transmission, and addition operations have been transferred signal superimposed white noise, simulated additive white Gaussian noise on the signal transmission channel impact in the receiving end of a corresponding signal demodulation, and compared with the original signal bit error rate calculation. Change the error of white noise power, signal to noise ratio and bit error rate mapping curve. And with the same group of other students to compare the performance curve modulation performance of the pros. Platform: |
Size: 464896 |
Author:ldj |
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Description: 16psk格雷映射的误码率仿真,已通过matlab仿真，绝对好用- Bit Error Rate for 16-PSK modulation using Gray modulation mapping
you can know 16psk modulation and gray modulation and apply them in your program Platform: |
Size: 1024 |
Author:小红 |
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Description: Simulation of a baseband QPSK mod/demod:
TX : a pseudo random bit stream generation, Serial to parallel conversion, QPSK Mapping (Gray coding), Signal power computation
Channel : AWGN channel
RX: Soft Demapping / Hard Demapping, Plot constellations, Compute BER-Simulation of a baseband QPSK mod/demod:
TX : a pseudo random bit stream generation, Serial to parallel conversion, QPSK Mapping (Gray coding), Signal power computation
Channel : AWGN channel
RX: Soft Demapping/Hard Demapping, Plot constellations, Compute BER Platform: |
Size: 4096 |
Author:IMM |
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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 |
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Description: 16QAM的matlab仿真,非常有用,包括Bit mapping,modulation and demodulation,Bit demapping,Parallel to serial conversion,Bit error ratio-16QAM the matlab simulation, very useful, including Bit mapping, modulation and demodulation, Bit demapping, Parallel to serial conversion, Bit error ratio Platform: |
Size: 2048 |
Author:刘悦 |
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Description: 用Matlab对通信系统中的ask,psk,fsk,dpsk等等调制解调方式做了仿真，并计算作图比较其误码率。-Communication systems using Matlab on the ask, psk, fsk, dpsk etc. modem to the way the simulation, and calculated to compare the bit error rate mapping. Platform: |
Size: 5120 |
Author:scorpioc |
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Description: 在理解RS码编译码原理的基础上使用Matlab或VC进行编程，首先产生一段随机序列，即原始的发送比特流，然后对该信号进行RS编码、BPSK映射、加噪、解映射及RS译码，得到恢复的数据。-Decoding RS codes in understanding the basis of the principle of programming using Matlab or VC, the first generating a random sequence, that is, send the original bit stream, and then the signal RS coding, BPSK mapping, noise, solution maps, and RS decoding , to recover the data. Platform: |
Size: 7168 |
Author:jinlongli |
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Description: THIS A MATLAB CODES TO SIMULATE 16 QAM
Bit Error Rate for 16-QAM modulation using Gray modulation mapping-THIS IS A MATLAB CODES TO SIMULATE 16 QAM
Bit Error Rate for 16-QAM modulation using Gray modulation mapping
Platform: |
Size: 9216 |
Author:NGABO |
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Search - matlab bit mapping