Description: 该程序用以对m序列码的调制在负dB情况下解调的仿真，是对基带信号的调制-procedures for the right sequence code m in the negative dB modulation of the demodulation simulation of the base band signal modulation Platform: |
Size: 1403 |
Author:孙晓东 |
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Description: 该程序用以对m序列码的调制在负dB情况下解调的仿真，是对基带信号的调制-procedures for the right sequence code m in the negative dB modulation of the demodulation simulation of the base band signal modulation Platform: |
Size: 1024 |
Author:孙晓东 |
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Description: 用matlab程序模拟实现cdma系统的整个过程。包括并串、串并转换，m序列的产生，直接扩频、解扩，qpsk的调制解调，载波调制解调等。-Matlab simulation procedures used to achieve the whole process of cdma systems. Including and string SERDES, m sequence generation, direct spread spectrum, despreading, qpsk the modulation and demodulation, carrier modulation and demodulation, etc.. Platform: |
Size: 8192 |
Author:朱丽平 |
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Description: //接收端的解码模块（可综合）
//在信号接收的刚开始发送端发送的是10个1信号，
//即10个+M序列，所以我们在开始时每接收到一个信号做一次累加运算
//当出现正的高峰时则认为达到同步，进入同步解调过程（mainbody）。
//也就是从此每进入一个信号就进行相应的相乘相加，
//在解接收到31个信号后进行一次判断，大于0认为接收到1，小于0认为接收到0。-//Receiver decoder module (which can be integrated)// at the beginning of the signal received by the sending end to send a signal 10,// that is, 10+ M sequence, so we at the beginning of each receive a signal for a cumulative computing// When the peak is reached when that synchronization, access to the process of synchronous demodulation (mainbody).// That is, a signal from each corresponding to the sum of the multiplication,// in the solution of 31 receive a signal after the judge, that the receiver is greater than 0 to 1, less than 0 that received 0. Platform: |
Size: 2048 |
Author:attawa |
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Description: 二用户CDMA系统，信道为加性高斯信道，使用BPSK调制，15位M序列扩频，可以正确解扩解调。
输出为2用户的基带信号、扩频信号、PSK调制信号、解调信号的时域和频域特性，给出两个用户分别的误码率。 -Second, the user CDMA system, channel for the additive Gaussian channel, using BPSK modulation, 15 M Sequence Spread Spectrum, you can correct demodulation despreading. Output of 2 user' s baseband signal, spread spectrum signal, PSK signal modulation, demodulation signal time domain and frequency domain characteristics of the two users are given the bit error rate, respectively. Platform: |
Size: 190464 |
Author:哈哈 |
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Description: 直序扩频系统，首先基带信号通过脉冲成型，m序列扩频然后进行BPSK调制发送，接收端接收到信号加干扰和噪声，进行解调和解扩恢复原始信号。- The straight foreword wide frequency system, the first baseband signal through the pulse formation, the m sequence wide frequency then carries on BPSK the modulation transmission, the receive termination receives the signal to add the disturbance and the noise, carries on the demodulation and the despread restores the primary signal. Platform: |
Size: 2048 |
Author:xiaoxiao |
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Description: DS-CDMA实现基本过程：
<TRANSMITTING END>待传信息--NRZ变换（变成NRZ码）---调制（乘以sqrt(2*eb)*cos(2*w*t)）----扩频（乘以m序列或其他伪随机码）
----信道中传输（有加性噪声）<DURING THE CHANNEL>
---解扩（乘以相同的m序列或其他伪随机码）---解调（乘以sqrt(2*eb)*cos(2*w*t)）----比特判别（sum(i)>0-->1 sum(i)<0--->0）-DS-CDMA to achieve the basic process: <TRANSMITTING END> Information to be passed- NRZ transformation (into NRZ code)--- modulated (multiplied by sqrt (2* eb)* cos (2* w* t ))---- spread spectrum (multiplied by the m-sequence or other pseudo- random code)---- channel transmission (with additive noise) <DURING THE CHANNEL>--- Despreading (multiplied by the same pseudo-random m-sequences or other code)--- demodulation (multiplied by sqrt (2* eb)* cos (2* w* t ))---- bit identification (sum (i)> 0-> 1 sum (i) < 0---> 0) Platform: |
Size: 2048 |
Author:mlj |
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Description: 全数字2DPSK调制解调系统，为VHDL语言。包括512分频器，M序列发生器等。整个过程完成2DPSK的调制与解调。-The full the digital 2DPSK modem system for the VHDL language. Including the 512 divider, the M-sequence generator. The whole process is completed 2DPSK modulation and demodulation. Platform: |
Size: 415744 |
Author: |
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Description: 基于m序列的DS-CDMA通信系统仿真的调制解调模型-M-sequence-based DS-CDMA communication system simulation model of modulation and demodulation Platform: |
Size: 84992 |
Author:施建锋 |
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Description: 信号用m序列进行扩频，成型滤波和BPSK调制后经过信道发送到接收端，接收端进行解扩解调-Using m sequence spread spectrum signal, after forming filter and BPSK modulation channel is sent to the receiver, the receiver to enlarge demodulation
Platform: |
Size: 1024 |
Author:小小娟飞飞 |
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Description: 发射机的设计是采用m序列来扩展二进制数据流，将其扩频为宽频信号，并采用QPSK调制方式将信号调制后发送出去。信号经过AWGN信道传输到接收端。接收机采用相干解调原理解调信号，采用的解扩码序列与发射机扩频码序列完全相同，信号经解扩调制后，带宽恢复原始宽度。-Transmitter design is the use of m sequence to expand the binary data stream, the spread spectrum is a broadband signal, and the use of QPSK modulation mode to send out the signal modulation. The signal is transmitted to the receiving end via the AWGN channel. The receiver uses the coherent demodulation principle and demodulation signal, and the sequence of the code sequence is identical with that of the transmitter. Platform: |
Size: 29696 |
Author:shinfer |
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Description: 关于跳频信号的产生，调制和解调，可自行设置几跳，内有m序列的产生等调用函数，适合初学者参考-The generation of hopping signal, including modulation and demodulation, you can set a few jump, there were the funciton of m sequence and so on. It is suitable for beginners . Platform: |
Size: 3072 |
Author:林沫 |
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Description: 这是一个完整的matlab下的扩频通信系统的仿真源代码。包括QPSK调制、m序列生成、载波调制、解调、解扩等操作。非常完整，代码通过调试，可以直接运行。-This is a complete matlab under the spread spectrum communication system simulation source code. Including QPSK modulation, m sequence generation, modulation, demodulation, despreading and other operations. Very complete, the code through the debugger, you can run directly. Platform: |
Size: 8192 |
Author:gaochuang |
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Description: 直扩MSK通信链路的仿真程序。PN码采用m序列，周期可自行改动。接收端解扩解调同时进行。亲测可用。(Simulation program of DSSS MSK communication link. PN code uses m sequence, the cycle can be changed by itself. Simultaneous demodulation and demodulation are carried out at the receiver. Pro test available.) Platform: |
Size: 2048 |
Author:只剩下安静
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Description: 在FPGA实验操作系统实现ASK,FSK,PSK的调制解调，基带信号由M序列发生器产生，经过AD模块在示波器上进行显示，精油DA模块在同一块实验板上进行解调操作，生成信号控制LED灯的亮灭，并与调制输出信号在示波器上同时展示，并进行对比。基带信号为3MHz。(In the FPGA operating system experiment implementation ASK, FSK, PSK modulation and demodulation of the baseband signal generated by the M sequence generator, through the AD module on the oscilloscope display module, oil DA demodulation operation in the same block experiment board, the signal generation control LED lights off, and the modulated output signal displayed on the oscilloscope at the same time, and compared.) Platform: |
Size: 48144384 |
Author:ryanshuai |
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Description: 基于DQPSK的直接序列扩频系统，包括调制解调等模块。(Direct sequence spread spectrum system based on DQPSK, including modulation and demodulation module.) Platform: |
Size: 14336 |
Author:corn |
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Search - M sequence demodulation