Description: An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. -An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. Platform: |
Size: 11264 |
Author:Griffin Wright |
Hits:
Description: 自相关法求取时间序列延时的函数，包括Simulink产生时间序列的文件，两个主函数，以及运行程序-Since the correlation function to obtain time series of delay, including time series generated Simulink file, the two main functions, and operational procedures Platform: |
Size: 9216 |
Author:yjduoduo |
Hits:
Description: cdma是在数字技术的分支——扩频通信技术上发展起来的一种崭新而成熟的无线通信技术。即将需传送的具有一定信号带宽信息数据，用一个带宽远大于信号带宽的高速伪随机码进行调制，使原数据信号的带宽被扩展，再经载波调制并发送出去。接收端使用完全相同的伪随机码，与接收的带宽信号作相关处理，把宽带信号换成原信息数据的窄带信号即解扩，以实现信息通信。-cdma wireless communication technology in a new and sophisticated digital technology branch- spread-spectrum communication technology developed. The data will be transmitted with a certain signal bandwidth information, bandwidth of the signal with a bandwidth much larger than the high-speed pseudo-random code is modulated, so that the bandwidth of the original data signal to be extended, and then via the carrier modulation and sent. Receiver use exactly the same pseudo-random code, for a correlation processing with the received bandwidth signal, the wideband signal is replaced with the original information data on narrowband signal despreading, in order to achieve information communication. Platform: |
Size: 14336 |
Author:jingjing |
Hits:
Description: C-CMethod.m C-C法主函数，调用方式见函数体
correlation_integral.m 关联积分求解（被C-C法主函数调用）
disjoint.m 将时间序列分为t个不相交的向量
heaviside.m 判断函数>0为1，<0为0
reconstitution.m 相空间重构函数
lorenz_phase.m 实验函数，用lorenz系统测试C-C法
lorenz_sim.mdl 用simulink建立的lorenz系统-C-CMethod.m CC method main function, see the body of the function invocation correlation_integral.m correlation integral solution (CC method is the primary function call) disjoint.m time series is divided into t disjoint vector heaviside.m determine the function> 0 1, < 0 0 reconstitution.m experimental phase space reconstruction function lorenz_phase.m function lorenz system test with CC method lorenz_sim.mdl established lorenz system with simulink Platform: |
Size: 15360 |
Author:孙明 |
Hits:
Description: 有关捕获算法的小程序，其中包括论文，以及PN码的产生、自相关、互相关的matlab仿真，还有一个扩频接收机的simulink仿真。-About capturing algorithm for small procedures, including papers, as well as to generate the PN code, autocorrelation, cross correlation matlab simulation, there is a spread spectrum receiver simulink simulation. Platform: |
Size: 11078656 |
Author:夏运兵 |
Hits:
Description: 采用simulink搭建的GPS软件接收机模型，包含从伪码生成、相关接收、捕获、跟踪、解码等完整的流程。内涵解释说明文件，需要用的一定要按照说明配置求解器。-Using Simulink to build the GPS software receiver model, including the pseudo code generation, correlation reception, capture, tracking, decoding and other complete process. Explain the meaning of the document, the need to use the instructions must be configured solver. Platform: |
Size: 3234816 |
Author:dlbuaa |
Hits:
Description: Correlation diagram shown in detail the time domain and frequency domain, Partial least squares method, It can be directly calculated multi-fractal spectrum. Platform: |
Size: 7168 |
Author:qaofiefang
|
Hits:
Description: Correlation analysis process matlab method, Consider shadow rain attenuation and multipath effects Algorithm for researchers to do reference. Platform: |
Size: 8192 |
Author:lanjenliekie
|
Hits:
Description: For feature reduction, feature fusion, correlation analysis, Is a good learning materials to learn PCA feature extraction, Stepwise linear regression. Platform: |
Size: 5120 |
Author:bpfeyx
|
Hits:
Description: Multirate signal processing, Correlation diagram shown in detail the time domain and frequency domain, Suppressed carrier type differential phase modulation. Platform: |
Size: 150528 |
Author:manqiekei
|
Hits:
Description: Realization of 10 digital audio recognition program For feature reduction, feature fusion, correlation analysis, Computing time and two-dimensional histogram. Platform: |
Size: 40960 |
Author:ivnser
|
Hits:
Description: 5. 在三条径的瑞利信道中，对于直接序列扩频：
(1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。
(2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。
(3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(5. In three-path Rayleigh channel, for direct sequence spread spectrum:
(1) please design a specific code division navigation aided channel estimation method for ds-cdma, and adopt equal-beneficial combination and maximum ratio combination for receivers respectively.Simulink is used to simulate and draw the relationship curve between bit SNR and channel estimation mean square error and the relationship curve between bit SNR and bit error rate.
(2) assuming that the frequency has been synchronized, please design a specific single-stop sliding correlation time synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and the acquisition probability curve.
(3) if the time has been synchronized, please design a specific frequency synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and frequency synchronization error curve.) Platform: |
Size: 3554304 |
Author:kmdcdy |
Hits:
Search - correlation simulink