码分多址系统
- 网络cdma;LAS-CDMA
-
格形编码调制(TCM)技术在码分多址系统中的应用
Application of Trellis Coded Modulation Technique to CDMA System
-
通过色散补偿光纤与非循环单重合码相结合,改善了快跳频光码分多址系统(FFHOCDMA)的误码率性能。
The scheme of dispersion-compensated fiber ( DCF ) and non-cyclic one-coincidence sequence was proposed to im-prove the BER performance of fast frequency-hopping optical CDMA system ( FFH OCDMA ) .
-
使用任意chip波形时准同步码分多址系统的性能分析
Performances Analysis of Quasi synchronous Code Division Multiple Access System Using Arbitrary Chip Waveform
-
基于Turbo编码和二进制脉冲位置调制的快跳频光码分多址系统
Turbo-Coded Optical Fast Frequency-Hopping CDMA System Based on Binary PPM Modulation
-
用于光码分多址系统的一种3-D地址码
A 3-D Code for OCDMA System
-
GOLD码发生器广泛应用于CDMA码分多址系统。其主要用途是产生具有良好相关特性的码序列。
GOLD code generators are used extensively in CDMA system to generate code sequences with good correlation properties .
-
针对光谱相位编码光码分多址系统(OCDMA)的信息侦听技术进行了研究。
The information eavesdropping techniques of spectral phase-coded OCDMA system were investigated .
-
BCH信道编码对快跳频光码分多址系统性能的改善
Performance Enhancement for FFH-OCDMA Systems by BCH Channel Coding
-
IS-95码分多址系统上行信道接收机捕获单元的设计及FPGA实现
The Design and FPGA Realization of the Capture Unit in Uplink Channel Receiver of IS 95 CDMA Cellular System
-
多载波扩展频谱码分多址系统(MC/CDMA)是一种消除符号间干扰的有效技术。本文提出了一种新的多载波码分多址(MC/CDMA)系统。
MC / CDMA is one of the effective techniques to mitigate the ISL In this paper , a new MC / CDMA system is proposed .
-
OVSF码对码分多址系统信号峰平功率比的影响
Influence of OVSF code on peak-to-average power ratio in code-division multiple access systems
-
仿真研究了传输信道和光功率对光码分多址系统性能的影响,分析了传输距离、光纤色散系数、光纤衰减、入纤光功率等与误码率和Q值的关系。
The influences of length , dispersion index and attenuation index of transmission fiber and incident optical power on BER ( bit error rate ) and Q value of the system is analyzed .
-
总而言之,TDCS是一种具有频谱自适应能力的宽带码分多址系统。
In a word , TDCS is a spectrum agile and broadband Code Division Multiple Access ( CDMA ) technology .
-
采用MonteCarlo的方法,在无线衰落信道下对采用混沌序列和Gold序列的异步码分多址系统进行了仿真。
Monte Carlo simulations of an A CDMA system with chaotic sequences and Gold sequences for a wireless fading channel show that the properties of optimized chaotic sequences are better than those of gold sequences in A CDMA systems .
-
提出了一种宽线性动量LMS算法,分析了算法在均方意义下的收敛性,给出了算法稳定条件和失调公式,以及算法应用于码分多址系统多址干扰抵消的效果。
A widely linear momentum LMS algorithm for CDMA MAI suppression had been proposed . Its mean square convergence had been analyzed , and its stability region and misadjustment had been found out .
-
分析了时分同步码分多址系统(TD-SCDMA),终端误差矢量值(EVM)指标的一致性测试需求,提出了一种基于迭代的EVM一致性测试算法。
The requirement of error vector magnitude ( EVM ) measurement in conformance test was analyzed . A novel EVM measurement algorithm based on the iterative process was presented .
-
基本LS(linkspacecode)码具有零相关窗(IFW)且被用于传统大区域同步码分多址系统(LAS-CDMA),但其零相关窗的分布是不均匀的。
Basic link space code ( LS ) code has interference free window ( IFW ) and is used by traditional large area synchronous-code division multiple access ( LAS-CDMA ) system , but this IFW is not uniformly distributed .
-
分析了基于光正交码(OOC)的光码分多址系统的性能。
Analyzes the performance of unipolar OCDMA system using optical orthogonal code ( OOC ) considering the dispersion and nonlinearity effect of the transmission medium .
-
采用MonteCarlo的方法,在AWGN信道下,分别采用混沌优选序列和一类四相准最优序列作为扩频序列,对复数处理的异步码分多址系统进行了仿真。
Monte Carlo simulations in A CDMA system with complex processing and quaternary data modulation are carried out on AWGN channel , where chaotic sequences and one kind of quasi optimum quaternary sequences are employed to spread spectrum respectively .
-
在频谱相位编码光码分多址系统中,多址干扰(MAI)的包络特性将直接影响系统误码率公式的推导。
In a spectral phase encoding optical code division multiple access ( SPE OCDMA ) system , the envelope behavior of multi access interference ( MAI ) directly affects the bit error rate of the system .
-
光码分多址系统中光学相关接收机判决阈值的分析
Analysis of decision threshold for optical correlation receivers in OCDMA system
-
多载波码分多址系统联合特征码与子信道动态分配
Joint Spreading Sequence and Subchannel Dynamic Allocation in Multicarrier CDMA System
-
二维光码分多址系统及其编/解码器设计
Two-dimensional Optical CDMA Networks and the Design of Encoder / Decoder
-
在此基础上,提出了光跳频码分多址系统的改进方案。
Finally , a modified scheme of FFH-OCDMA system was proposed .
-
光码分多址系统关键技术与发展前景
Key techniques for implementation of optical CDMA and its development prospects
-
码分多址系统中基于判决引导的窄带干扰抑制非线性算法
Decision-Directed Based Nonlinear Algorithm for Narrowband Interference Suppression in CDMA Systems
-
码分多址系统中基于小波变换的多用户检测
Multiuser Detection Based on Wavelet Transform in Direct Sequence CDMA Systems
-
空时分层结构码分多址系统的上行多用户检测
Uplink multiuser detection for CDMA systems based on layered space-time coding
-
频谱相位编码光码分多址系统中多址干扰的包络特性
Envelope Behavior of Multiple-Access Interference in Spectral Phase Encoding OCDMA Systems
-
频域相位光码分多址系统性能的研究
Investigation on Performance of OCDMA System with Spectrum-Phase En / Decoder