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Description: 利用MATLAB实现多用户的扩频通信的发送和接受，程序可以直接跑，不需要改动！-The use of MATLAB implementation of multi-user spread spectrum communication send and receive, the program can be directly run, no changes!
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Size: 3072 |
Author: huangshuangping |
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Description: 一个四用户的扩频通信系统，扩频增益为N=16，采用Walsh码进行直接序列扩频，BPSK调制，无线信道为AWGN(加性高斯白噪声信道)信道(AWGN信道：不考虑通信信道信号时，由宽频范围描述的统计随机无线噪声。)。在接收端进行解扩，解调，判决，通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。-A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct Sequence Spread Spectrum, BPSK modulation, channel for AWGN (additive white Gaussian noise channel) channel (AWGN channel: do not consider communication channel signals, described by the scope of broadband wireless random statistical noise.). At the receiving end for despreading, demodulation, judgments, through the simulation to be one of a user' s bit error rate and SNR of the simulation results.
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Size: 9216 |
Author: jehuty |
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Description: communication system is expected to increase the service, the quality improvement and also the capacity, using spread spectrum communication system is one of the method to fulfill that demand. This quality and capacity factor will depend on the number of user. In order to see the performance of the Wiener Filter on the MC-CDMA system, simulation method is used by increasing the Direct Sequence Spread Spectrum CDMA signal, with digital modulation QPSK
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Size: 249856 |
Author: hario |
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Description: This file implements the Multi User Kurtosis Algorithm for Blind Source Separation (see [1] for more details about the method).
The zip file contains:
- the one_shot.m script file
- the MUK_algorithm.m function
The one_shot.m file illustrate the bahaviour of the algorithm for a simple MIMO communication using QPSK modulation. Just unzip the zip files in your computer and run the one_shot script.
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Size: 3072 |
Author: Alex |
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Description: There are 5sample files of qpsk, ofdm, scfde, alamouti and space time codings.
those of 5samples can be useful for using matlab user.
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Size: 8192 |
Author: doung-chul |
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Description: 分层调制仿真，根据接收用户信道条件好坏，可以按QPSK或16QAM解调。-Hierarchical modulation simulation, according to the received user channel condition is good or bad, can demodulate QPSK or 16QAM.
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Size: 1024 |
Author: |
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Description: 轻武器权限申请程序等外侧段v二大王我我的2的1我-In cognitive radio networks, power control is considered as an important issue to improve the performance of dynamic spectrum sharing. In this paper, in order to maximize the efficiency of the system, the secondary users and primary user behaviors will be considered.
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Size: 9216 |
Author: 武款 |
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Description: 为评估TD_SCDMA下行链路联合检测接收机的性能，使用MATLAB软件进行链路仿真，本程序主要是实现用户QPSK基带调制、扩频、加扰、形成时隙、形成子帧、以及进行脉冲形成滤波，通过加性高斯白噪声信道和瑞利衰落多径信道，信道估计、联合检测等几个主要过程，整个仿真都是在基带进行的。-Link simulation to assess the performance of the TD_SCDMA Downlink joint detection receiver using MATLAB software, this program is the main user QPSK baseband modulation, spreading, scrambling to form a slot to form a sub-frame, as well as for pulse formation filter, through an additive white Gaussian noise channels and Rayleigh fading multipath channel, channel estimation, the joint detection of several major process, the entire simulation in the baseband
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Size: 8192 |
Author: 小怪 |
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Description: 本程序为仿真TD-SCDMA的调制解调过程，针对单用户使用QPSK调制，整个仿真过程在基带进行。-The program for the simulation of TD-SCDMA modulation and demodulation process, using QPSK modulation for single-user, the entire simulation process in the baseband.
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Size: 4096 |
Author: 小怪 |
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Description: 主函数Alamouti(Nr,max_snr,max_err_symbol,symbol_per_frame)
调用函数QpskMapping(psudo_bit_sequence)－－二进制数据到QPSK信号的变换
调用函数RayleighCH(Nr,Nt)－－瑞利衰落信道模拟
仿真示例：
Alamouti(1,12,20,24)
说明：
1.2根发射天线、1根接收天线
2.最高信噪比为12dB，即仿真范围为0dB到12dB
3.在每个信噪比条件下,误符号数超过20即停止该信噪比条件下的仿真
4.每一帧数据为24个QPSK符号
综合仿真函数SimAlamouti(max_snr,max_err_symbol,symbol_per_frame)
具有一根接收天线系统的SER性能与二根接收天线的系统SER性能比较
SimAlamouti(12,20,24)
参数说明：
1.max_err_symbol的取值直接影响了仿真的精度：取值越大，精度越高，误符号率曲线也更平滑；但需更长的仿真
时间
2.一般max_snr小于15dB，程序中snr为信号噪声功率比
3.本程序仿真时未考虑帧与帧之间，信道衰落系数的相关性，因此symbol_per_frame一定程度上表征了信道相关时
间的大小，即在symbol_per_frame个QPSK信号发送时间内，信道衰落系数是不变或缓变的，而在下一帧数据中，
信道衰落系数可以认为已变成另一值
4.本程序假定在接收端已通过信道估计获得信道衰落系数-ALAMOUTI performs Monte-Carlo simulation and estimates Bit Error Rate
(BER) of Alamouti Scheme [1] over Rayleigh channel. The scheme presumes
2 transmit (Tx) and arbitrary number of receive (Rx) elements.
If Rx=1 (one receive element) ALAMOUTI is transformed to the order 2
transmit diversity scheme with Maximum Ratio Combining (MRC). The
modulation format is MPSK with arbitrary order M which can be
controlled by user.
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Size: 203776 |
Author: chenyiren |
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Description: 1、判断输入年份的生肖
2、QPSK和QDPSK的调制仿真系统
3、输入学生管理系统界面
4、根据用户的消费确定赠品
5、对输入有效的3个数进行排序
6、判断输入的年份是否是闰年
7、判断输入日期是第一年中的第几天-1, the judge enter the year of the zodiac 2, QPSK modulation and QDPSK simulation system 3, enter the student management system interface 4, according to the consumer to determine the user' s gift 5, the number of the input valid three sorts 6, to determine whether the year entered Leap Year 7, enter the date judgment is the first year in the first few days
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Size: 29696 |
Author: 宋桂红 |
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Description: A Hybrid Orthogonal Frequency Division Multiplexing & Code-Division Multiple-Access (OFDM-CDMA)
This is a simulation program for uncoded OFDM-CDMA system with QPSK modulation
and Complex channel modelled by Rayleigh fading. The program is modified based
on Iterative chip-by-chip multi-user detection has been adopted in this simulation
-A Hybrid Orthogonal Frequency Division Multiplexing & Code-Division Multiple-Access (OFDM-CDMA)
This is a simulation program for uncoded OFDM-CDMA system with QPSK modulation
and Complex channel modelled by Rayleigh fading. The program is modified based
on Iterative chip-by-chip multi-user detection has been adopted in this simulation
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Size: 15360 |
Author: widad |
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Description: 单小区单用户多天线MIMO环境下，QPSK调制进行MMSE接收处理，比对理想，非理想和一般MMSE接收的性能-Under the single-cell single-user multi-antenna MIMO environment, QPSK modulation MMSE receiving treatment, compared to the ideal, non-ideal performance and general MMSE reception
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Size: 1024 |
Author: lu hao |
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Description: 单小区单用户多天线MIMO环境下，QPSK调制进行ZF接收处理，比对理想，非理想和一般MMSE接收的性能-Under the single-cell single-user multi-antenna MIMO environment, QPSK modulation ZF receiving treatment, compared to the ideal, non-ideal performance and general ZF reception
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Size: 1024 |
Author: lu hao |
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Description: 这个程序是用来仿真多小区多用户，已知信道信息，采用OFDM，QPSK调制下的误码性能分析，特点是将预编码参数放在频域处理。-This program is used to simulate multi-user multi-cell, known channel information, using OFDM, QPSK modulation BER performance under analysis, is characterized by the pre-coding parameters on the frequency domain.
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Size: 8192 |
Author: 王晨阳 |
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