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西安邮电大学通信与信息工程学院无线通信原理课件第八章 IS-95 CDMA系统。
Analysis of Belief Propagation for Non-Linear Problems: The Example of CDMA (or: How to Prove Tanaka’s Formula)
Binary signal and white gaussian noise spread sequence scheme of linear time
2015/8/21
We consider the CDMA (code-division multipleaccess) multi-user detection problem for binary signals and additive white gaussian noise. We propose a spreading sequences scheme based on random sparse si...
Simutaneous rate and power control in multirate CDMA systems
Wireless multimedia terminal transmission data rate and transmission rate optimize the data transfer rate
2015/8/11
We consider a wireless multimedia CDMA system, where the different mobiles transmit at different rates. We devise a method of simultaneously optimizing the power and rate at which the different termin...
Simultaneous routing and resource allocation in CDMA wireless data networks
Routing wireless networks data network transmission and network performance
2015/8/11
The optimal routing of data in a wireless network depends on the link capacities, which, in turn, are determined by the allocation of transmit powers across the network. Thus, the optimal network perf...
Simultaneous Rate and Power Control in Multirate Multimedia CDMA Systems
Simultaneous Rate Power Control Multirate Multimedia CDMA Systems
2015/7/10
We consider a wireless multimedia CDMA system, where the different mobiles transmit at different rates. We devise a method of simultaneously optimizing the power and rate at which the different termin...
Simultaneous Routing and Resource Allocation in CDMA Wireless Data Networks
Simultaneous Routing Resource Allocation CDMA Wireless Data Networks
2015/7/10
The optimal routing of data in a wireless network depends on the link capacities, which, in turn, are determined by the allocation of transmit powers across the network. Thus, the optimal network perf...
Optimal Link Adaptation in Wideband CDMA Systems
Optimal Link Adaptation Wideband CDMA Systems
2015/7/8
We develop a general framework for optimizing link adaptation for multiuser CDMA systems in the wideband limit. The framework is then used to solve for the optimal power control policy that minimizes ...
Optimal Power Control for CDMA Systems in the Wideband Limit
Optimal Power Control CDMA Systems Wideband Limit
2015/7/8
Traditional methods for solving multiuser control problems in CDMA systems do not scale well as the number of users in the system increases. To address this problem we develop a wideband limit approxi...
针对具有空时分组码的多载波CDMA(Space Time Block Coding Multi Carrier Code Division Multiple Access,STBC-MC-CDMA)信号扩频码及信息序列的联合估计问题,结合序贯蒙特卡罗(Sequential Monte Carlo,SMC)算法和卡尔曼滤波技术,充分利用STBC和OFDM(Orthogonal Frequency D...
基于CDMA的油井信息监控技术研究
CDMA监控技术 单边带信号 动态分配
2017/1/6
油田企业多采用CDMA信息监控技术对传输信号进行单边带信号的调整。这种信息监控技术能够保证传输数据在幅值上进行反比的转化，同时在波形周期上满足传输信道之间的时间间隙。并且CDMA监控技术利用了动态带宽分配技术，在信道空闲状态下，完成其他各传输信道内数据的传递，使接收设备在有效时间内完成信息的对接。对CDMA油井信息监控技术的分析，对其抽样、量化、编码原理及功能全面解析，可得知单边带信号的调制能够对...
DS-CDMA是在扩频技术上发展起来的多址接入方式，但在用户接入数量过载时难以保证高质量的通信性能。基于此，提出了一种基于稀疏图的DS CDMA系统。该系统以低密度二分图的形式来描述扩频码片和用户之间的关系，使得参与通信的每个用户只在少量码片上进行非零位扩频调制，最大限度地减少了用户间的相互干扰。借助图模型的相关理论，把适合于稀疏图的置信度传播算法应用于该系统，进行多用户检测，通过码片与用户之间的...
DS-CDMA是在扩频技术上发展起来的多址接入方式，但在用户接入数量过载时难以保证高质量的通信性能。基于此，提出了一种基于稀疏图的DS CDMA系统。该系统以低密度二分图的形式来描述扩频码片和用户之间的关系，使得参与通信的每个用户只在少量码片上进行非零位扩频调制，最大限度地减少了用户间的相互干扰。借助图模型的相关理论，把适合于稀疏图的置信度传播算法应用于该系统，进行多用户检测，通过码片与用户之间的...
针对异步DS-CDMA系统存在强恶意干扰时，系统性能急剧下降的问题。本文提出一种采用双天线接收的盲联合干扰消除与多用户检测方案。不同于传统的多用户检测方法，该方案考虑了恶意干扰的影响，首先通过串并变换将恶意 干扰等效为多路信号，然后利用双天线接收到的两路受扰信号构造超定或适定盲源分离模型，将干扰消除与多用户检测问题转化为一相关源的盲分离问题，最后利用基于最大非高斯性盲源分离算法进行分离，从而实现盲...