In DS CDMA channels with multipath and multiple access interference, this paper estimates blindly the user channel with extended space time channel model to process the blind MMSE detection.
在多径多址干扰DS CDMA环境中，本文根据空时信号模型，用扩展的盲方法估计用户信道，从而进行盲mmse检测。
This paper investigates blind space-time interference suppression for MultiCarrier CDMA (MC-CDMA) system in frequency selective Rayleigh fading channel.
该文研究在频率选择性瑞利衰落信道中MC-CDMA系统的盲空时干扰抑制。
This paper investigates blind multiuser detection for asynchronous DS-CDMA in frequency selective Rayleigh fading channel.
该文研究了频率选择性瑞利衰落信道中的异步ds - CD MA系统盲多用户检测。
The space-time channel estimation and multiuser detection algorithm for the uplink of multicarrier CDMA (MC-CDMA) system in frequency selective Rayleigh fading channel were investigated.
研究了频率选择性瑞利衰落信道中的同步MC-CDMA系统上行链路空时信道估计及多用户检测算法。
Based on the signal model and the multipath channel model of CDMA system, the steering vectors of multipaths of USES are estimated by using cold filtering method.
根据CDMA系统信号模型和多径信道模型，运用码滤波方法对CD MA系统用户信号及其多径信号导引向量进行估计。
The CDMA system attains the better performance of resisting near-far effective because of employing this forward error control (FEC) channel coding technology.
由于采用了这种前向差错控制（FEC）信道编码技术，使得CDMA系统具有了较好的抗远近效应性能。
In a CDMA system, channel estimates of all received user signals were available at base stations.
在CD ma系统中，所有上行用户信号的信道估计信息都可以在基站上获得。
Generally, in CDMA mobile communication system, the sink's receiving signals are composed of multi-user's useful information and channel noise.
通常在CD MA移动通信系统中，接收端的接收信号由多个用户的有用信息和信道噪声组成。
According to different channel models, CDMA systems can be divided into additive white gaussian noise (AWGN) channel and dispersive channel, time-variant and time-invariant channel.
CD MA系统按信道模型的不同分为高斯白噪声信道和衰落信道、时变和时不变信道。
The parameter estimation of the signal propagating channel in CDMA systems is a key technology, which involves estimation of amplitude and delay of signal propagating channels.
信道估计是CD MA系统中的关键技术，涉及到对用户信号传播信道的幅度、相位和延时的估计。
The technique combining MAP-based multi-user detection (MUD) with channel decoding can greatly improve performance and capacity of broadband CDMA mobile communication systems.
联合MAP多用户检测与信道解码的迭代多用户检测(MUD)技术可显著提高宽带移动CD MA系统的容量和性能。
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。
The traditional CDMA technology has serious multi address interference phenomenon, so the frequency spectrum efficiency of the channel can′t reach the optimal state.
传统的CDMA技术存在严重的多址干扰现象，使得信道的频谱效率不能达到最佳状态。
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。
By unified signal model of antenna array Multicarrier DS-CDMA system, the subspace-based blind channel estimation is achieved.
通过在阵列天线多载波ds - CD MA系统下构造统一的信号模型，实现了基于子空间的信道盲估计。
This paper discusses four aspects of the iterative detection of the MC-CDMA system, including equalization, feedback, channel estimation and the density evolution analysis of the MC-CDMA system.
本文从迭代检测的均衡、反馈、信道估计和密度演进分析四个方面展开讨论。
The result presents that when LAS-CDMA system using 16QAM modulation under AWGN channel, the error probability of sphere decoding goes to theory error probability of ML algorithm.
介绍了球译码算法的工作原理，给出了算法流程；研究结果表明AWGN信道下LAS-CDMA系统使用16QAM调制时，球译码算法差错率趋近于使用基于ML算法的理论差错概率。
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。
The CDMA system was widely used in the traditional system, but its data rate is not fast enough to satisfy the system that needs in some channel environment.
传统的遥控遥测系统多运用码分多址技术，在某些信道环境下，它的传输速率有时达不到高速通信的要求。
Moreover, FDE has been adopted as a key technique for both DS-CDMA and multi-carrier (MC -) CDMA to overcome the channel frequency-selectivity.
频域均衡作为关键技术不仅运用于DS- CDMA系统，而且也运用于多载波cdma (MC - CDMA)系统中来克服信道的频率选择性。
In CDMA mobile communication systems, multiple access interference can be cancelled by multiuser detection technique. The degradation by channel fading can be reduced by diversity reception.
在CD MA移动通信系统中，多址接入干扰可以通过多用户检测技术来消除，而分集接收可以减小信道衰落的影响。
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。
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。
Conventional CDMA communication system has serious mutiple access interference (MAI), so the spectral efficiency and user capacity of channel is not maximum.
CDMA技术存在着严重的多址干扰(MAI)，使得信道的频谱效率未能达到最佳，系统的用户容量也不易达到最大。
In this paper the performance of uplink in the cellular CDMA network, based on the reception of smart antenna, is analyzed in the frequency selective fading channel.
本文分析了在频率选择性信道中基于智能天线阵接收的蜂窝cd MA网络上行链路的性能。
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。
Being wireless channel, the channel of CDMA system is very terrible medial of the nature.
然而CDMA移动通信系统的信道为无线信道，它是自然界中的一种较为恶劣的通信介质。
Chapter 2 describes the characteristics of wireless channel, presents vector channel model for wideband CDMA systems, and emphasizes on the characteristics of indoor wireless channel.
第二章描述了无线信道的特点，给出了宽带CD MA系统的矢量信道模型，并着重分析了室内无线信道的特征。
An SIR-based close loop power control algorithm is presented. The pilot symbols of control channel in DS-CDMA up-link system are used to measure the received SIR.
针对采用专用控制信道的DS - CD MA系统的上行链路，本文直接利用控制信道的导频符号进行SIR测量的闭环功率控制，并通过计算机仿真对链路的性能进行分析。
We propose a MC-CDMA system based on the optimized multiband complex wavelet transform (MBCWT), investigate the system performance in multipath Rayleigh fading channel.
提出一种基于优化多带复小波变换的MC-CDMA系统，研究了其在多径瑞利衰落下的性能。
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