The paper focuses on the handoff of CDMA systems.
本文重点研究了CDMA系统越区切换技术。
Study on optimum power control algorithm in CDMA systems;
应用最佳控制的最大原理。
The time source has been used in CDMA systems as a time benchmark now.
目前，该系统成功应用于CDMA基站的定时系统。
In this paper, a novel multipath diversity scheme used in TDD CDMA systems is proposed.
本文提出了TDDCD MA系统的一种新的多径分集方案。
The design of multiple sequences is one of the key problems in the satellite CDMA systems.
多址序列设计是卫星CD MA系统中的一个关键问题。
The chip level linear minimum mean square error (LMMSE) equalizer in CDMA systems is introduced.
介绍了码分多址CD MA系统中码片级线性最小均方误差均衡器。
An algorithm for time delay estimation in asynchronous band-limited DS-CDMA systems is presented.
该文提出了适合于异步带限DS - CD MA系统的时延估计算法。
The performance of downlink CDMA systems is influenced by channel fading and multi-access interference.
CD MA下行链路的性能受到信道衰落和多址干扰的影响。
In this paper, a low-complexity blind channel estimation technique is proposed for long-code MIMO CDMA systems.
该文提出一种用于多输入多输出CD MA系统的信道快速盲估计方法。
Multiple access interference (MAI) is a major factor which limits the capacity and the performance of CDMA systems.
在CD MA通信系统中，多址干扰是影响系统性能和系统容量的主要因素之一。
This paper introduces some schemes for optical CDMA systems employing coding spectrum of noncoherent broadband light.
介绍了对宽带光频谱进行编码的非相干光码分多址技术。
An estimation method of channel parameters for CDMA systems operating over channel with single or multiple propagation paths is proposed.
提出了一种单径或多径CD MA信道参数的估计方法。
It has been proved that iterative multiuser detection with decoding is a very effective way to increase system capacity in DS-CDMA systems.
在DS - CD ma系统中，联合译码的迭代多用户检测是克服多址干扰增加系统容量的有效方法。
The estimation scheme for DS-CDMA systems includes a computationally efficient and easily implemented pilot filter on CDMA forward channel.
提出了一种面向直接序列扩频（DS-CDMA）通信系统的基于导频信号的自适应信道估计方法。
However MAI is not the inherent problem of CDMA systems, it is because the conventional CDMA systems follow a single-user detection strategy.
然而多址干扰并不是CDMA系统的固有问题，是由传统的CD MA系统采用单用户接收策略造成的。
Use of zero correlation zone (ZCZ) sequences can avoid co-channel interference and multi-access interference in the quasi-synchronous CDMA systems.
在准同步cdMA系统中，使用零相关区(ZCZ)序列能够避免共信道冲突和多址干扰。
A blind multiuser detection (MUD) method based on a new desired user 'signature waveform estimation method in antenna array CDMA systems is proposed.
针对天线阵c DMA系统，提出了一种基于新的待检用户信号波形估计的盲多用户检测方法。
The results indicate that the atmospheric scintillation is an important factor for the bit error rate of two dimensional wireless optical CDMA systems.
结果表明，大气闪烁是影响二维无线光CDMA系统误码率性能的一个重要因素；
Next, the system structure of OFDM and multi-carrier system are discussed, followed by the pilot based channel estimation for the multi-carrier CDMA systems.
接着，本论文对OFDM和多载波cdma的系统结构进行了讨论，对多载波cdma系统中的导频信道估计技术进行了深入研究。
Simulation results show that our algorithm is flexible and efficient for mobile multimedia DS-CDMA systems, and the improvement of performance is significant.
仿真结果表明，该策略与传统方式相比能够更灵活有效的配置无线多媒体DS CDMA系统中的无线资源，其性能提高是显著的。
Chapter 5 focuses on the primary research of OFDM-CDMA system and discusses the realization of three type OFDM-CDMA systems based on the Software Radio platform.
第五章针对OFDM—CDMA系统进行了初步研究，在软件无线电平台上探讨三种OFDM—CD MA系统的实现。
According to the characteristics of MAI in CDMA systems, a multi user detector is designed by a new hard decision parallel decision algorithm for MAI cancellation.
针对多址干扰信号的特点，研究了一种改进的硬判决并行干扰多用户检测器。
With this model, the blind multiuser detection and iterative algorithm of MC-CDMA systems based on subspace projection are studied in the multipath fading channel.
由于其在对抗多径衰落方面具有显著的效果，它适合于在无线移动通信信道下使用，因而得到广泛的研究。
At the same time, it is demonstrated that many MUD algorithms developed primarily for DS-CDMA systems can be user essentially without any change in the TH-IR systems.
同时也证明了许多适用于DS - CD MA系统中的多用户检测算法，可以本质上几乎不加任何修改的适用于TH - IR系统中。
Algorithms based on DMMSE (Difference minimum mean square error) criterion of adaptive multi users detector for short spreading sequences DS CDMA systems is proposed.
给出了基于差分最小均方误差(DMMSE)准则的短扩频序列ds- CD MA自适应多用户检测算法。
Smart antenna using digital signal process technique, produces space directional beam, and utilizes space filter ability for improving the performance of CDMA systems.
智能天线利用数字信号处理技术，产生空间定向波束，利用其空间滤波特性可以提高CD MA系统的性能。
In this paper, we studied the spectral overlay of Infostations based on N-CDMA and WM-CDMA systems and analyzed the achievable capacity of I/WM-CDMA system in downlink.
对基于窄带码分多址（N-CDMA）方式的信息站系统与宽带多载波码分多址（WM-CDMA）系统的频谱叠加以及两个频谱重叠系统前向链路的容量进行了分析。
The work in this thesis is a part of the Nature Science Research Project of Anhui province "Research on blind adaptive multi-user detection in CDMA systems" (03042208) .
本论文结合安徽省自然科学基金项目“CDMA自适应盲多用户检测方法的研究”（03042208）。
The multiuser detection, power control and smart antenna technique can be used as power methods to suppress the interference, hence increasing the capacity of CDMA systems.
在CDMA系统中，引入多用户检测、功率控制和天线阵列波束形成技术，可以有效地抑制干扰，提高系统容量。
The multiuser detection, power control and smart antenna technique can be used as power methods to suppress the interference, hence increasing the capacity of CDMA systems.
在CDMA系统中，引入多用户检测、功率控制和天线阵列波束形成技术，可以有效地抑制干扰，提高系统容量。
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