多址方式

基于分数傅立叶变换的Chirp信号多址方式与接收方法研究

Study on Multiple Access and Receiving Scheme Using Chirp Signals Based on Frft

由于扩频具有良好的抗多径干扰的能力，因此，在地面移动无线系统中被认为是一种较好的多址方式。

Because Spread Spectrum techniques have a good ability of anti multipath interference in the land mobile radio system , it can be regarded as one kind of better multiple access techniques in the LEO personal satellite system .

对LTE技术的优势方面，主要从三个方面来介绍，即从频段方面考虑、从带宽方面考虑、从多址方式方面考虑。

About advantage of LTE technology , mainly introduced from three aspects to consider from the band , from bandwidth and from multiple access .

CDMA由于其用户容量大，抗多径衰落能力强以及便于实现软切换等特点而优于其他多址方式，近年来在移动通信系统中越来越得到重视。

CDMA has been found more and more attractive in mobile communication system over competing multiple access methods for its great system capacity , robust anti-multipath-fading capability , soft handoff and so on .

论文中分析了OFDM系统中几种常见的多址方式：OFDMA、OFDM-TDMA和OFDM-CDMA。

The disser ~ + ation analyzes several common multi-access techniques of OFDM , including OFDMA , OFDM-TDMA and OFDM-CDMA .

在IMT-2000标准中，CDMA以其固有的诸多优点成为主流多址方式，而CDMA是干扰受限系统，因此必须采取更为有效的干扰抑制技术。

In IMT-2000 standards , CDMA has become the primary multiple access technique because of its many benefits , but CDMA system are interference-limited , so more efficient interference suppression techniques are required .

为满足上述要求，宜采用CDMA／TDMA／FDMA混合多址方式，其中多载波CDMA已成为目前研究热点。

To meet the above requirement , it is suitable to use the hybrid techniques of CDMA / TDMA / FDMA . Among those , multi carrier CDMA schemes have drawn much attentions .

首先研究LTE所采用的MIMO、OFDM等核心新技术，其次总结上下行链路采用的OFDMA及SC-FDMA多址方式。

Firstly , new core technology , such as MIMO and OFDM , is studied . And then the multiple access technology of OFDMA and SC-FDMA used in the uplink and downlink is discussed .

首先介绍了UMTS中的时分多址方式，介绍并讨论了无线ATM中采用的各种动态TD－MA接入方式，最后说明了TDMA的地位和发展方向。

This paper first introduces the TDMA mode in the UMTS , Then discusses various dynamic TDMA modes in wireless ATM network , and finally it points out the status and development of TDMA .

本文首先介绍了MC-CDMA和OFDMA两种多址方式；然后提出了利用OFDMA来扩展MC-CDMA系统多址容量的新方法。

In this paper , firstly we introduce the two multiple access method : MC-CDMA and OFDMA , then we give a new approach to increase the multiple access capacity of MC-CDMA system using OFDMA .

根据联邦通信委员会关于超宽带辐射功率谱的限制以及适用于多址方式的窄脉冲要求，设计了一组基于Hermite函数的超宽带脉冲波形。

According to the constraint of the power spectral emission of Federal Communications Commission ( FCC ) mask and the requirement of short pulse for multiple access , the paper presents the design of a class of pulses based on Hermite functions for UWB communications .

对OFDM系统下行链路的不同多址方式进行了比较，介绍了分别用于OFDM-FDMA和OFDM-TDMA的自适应子载波分配和自适应调制。

In this paper , different multiple access schemes for the downlink of OFDM system are compared . Adaptive subcarrier allocation and adaptive modulation , applied to the OFDM-FDMA and OFDM-TDMA respectively , are discussed .

本文通过计算机仿真的方法，比较了TH-UWB和DS-UWB两种多址方式的多址性能，得出DS-UWB无论是用户容量还是误比特率都要优于TH-UWB。

We compare the performance between the TH-UWB scheme and the DS-UWB scheme by simulation , and the results show that the DS-UWB scheme is better than TH-UWB both in capability and in Bit Error Rate ( BER ) .

一种新型卫星多址方式的分离新算法

A Novel Separation Algorithm of A New Multiple Access Mode in Satellite

移动通信的多址方式简述

An Introduction to Multiple Access Technology in Mobile Communication

几种多址方式的蜂窝移动通信系统容量比较

Capacity Comparison Among the Cellular Mobile Communication Systems of Different Multiple Access Techniques

随机多址方式综述

Summary of the Random Multi - Access Method

预约型多址方式的最优信道容量分割

Optimal Channel Partition of Reservation Access Control Scheme

分析了在时分多址方式下的智能天线系统结构；

After that , the construction of smart antennas in TDMA system is analyzed .

通过几种多址方式的比较，选出最适合于高性能、低价格卫星数据通信系统的优越方案。

By comparing several multiple access modes , an optimal scheme is chosen which is suitable for a cost-effective satellite data communication system .

提出时分多址方式下由固定中继节点支持的透明模式下的随机接入协议，通过中继节点与用户间的合作重传来解决多个用户同时接入发生碰撞的问题。

A new random access protocol assisted by fixed relay stations under the transparent mode in multi-hop relay networks over the time division multiple access was presented .

本文考虑两种网络不同多址方式对吞吐量的影响，采用对数的效用函数，建立了以用户最小速率和网络吞吐量为约束，以最大化异构网络效用为目标的优化问题。

In this paper , the different kinds of multiple access methods are taking into consideration and a maximizing utility problem with the constraints of minimum rate requirement and network throughput limit is formed .

为了能够有效控制功率谱来满足特定频谱要求，通过理论分析的方式研究了多址方式、调制方式以及基带脉冲波形对功率谱的影响。

In order to shape the power spectrum to meet the specific spectral mask , the impacts of multi-access methods , modulation formats and baseband impulse on the power spectral density ( PSD ) are analyzed theoretically .

基于平衡Gold码的超宽带多址接入方式

The Multiple Access of Ultra-Wide Band based on Balance Gold Code

以CDMA为多址复用方式是现代移动通讯的主要特征。

CDMA is the main feature of modern mobile communications .

一种基于完备互补码的UWB多址接入方式

A Multiple Access Method Based on Complete Complementary Codes in Ultra WideBand Wireless Communication

CDMA是一种以宽带扩频技术为基础的多址接入方式，同时也是一种自干扰系统。

CDMA is a form of broadband spread spectrum technology-based multiple access methods , and also a kind of self-interference systems .

本文提出了一种基于CDMA的双向HFC网络竞争与预约相结合的上行信道多址接入方式。

In this paper , a CDMA - Reservation - Aloha access approach for the HFC network is proposed .

本文在介绍卫星ATM网络结构基础上，分析和比较了卫星链路基本多址联接方式的关键特性。

Based on introducing architecture of satellite ATM networks , this thesis analyses and compares the key features of basic multiple access methods in satellite link .

卫星通信系统的常见多址联接方式是时分多址（TDMA）。

At present , the most common satellite communications system is known as Time Division Multiple Access ( TDMA ) .