Spectral efficiency

Spectral Efficiency Analysis and Comparison of OFDM Based Transmission System

基于OFDM分组传输系统的频谱效率分析与比较

On the other hand , network coding can increase the spectral efficiency .

而网络编码可以提升无线通信系统的频谱效率。

Adaptive modulation can improve the system performance with high spectral efficiency .

自适应调制能提高系统的频谱利用率和改善系统的误码率性能。

For it can support higher rate data transmission and higher spectral efficiency .

它可提供高资料传输率和高频谱效益。

Future broadband wireless communication system needs higher spectral efficiency and higher data rate .

未来的宽带无线通信系统对系统的频谱利用率和数据传输率提出了更高的要求。

Two-way relaying with network coding can significantly improve system spectral efficiency .

采用了网络编码的双向中继能够明显地提高中继协作通信的频谱效率。

Optimal Design of ACM Based on Average Spectral Efficiency

基于平均频谱效率的自适应编码调制优化设计

Data capacity can be used as spectral efficiency criterion of adaptive modulation scheme .

数据容量可以作为衡量自适应传输效率的标志。

Communication technology will lead to higher data rates , spectral efficiency and user throughput .

通信技术的发展必定带来更高的数据传输速率、频谱利用率和用户吞吐量。

It can efficiently improve the system capacity , anti-jamming capability and spectral efficiency .

它能够有效地提高系统的传输容量、抗干扰能力以及频谱利用率。

Some modulation formats may overcome the transmission limitations and improve spectral efficiency .

其中新型调制格式是减轻传输损伤，提高频带利用率的一种重要手段。

LTE-Advanced system demands more on bandwidth , user data rate and spectral efficiency .

LTE-Advanced系统在带宽、用户数据速率、系统频谱效率等方面提出了更高的需求。

Spectral Efficiency of Adaptive Transmission in Urban Microcellular Networks

城市微蜂窝网络中自适应传输的频谱效率

Higher level modulation must not provide higher spectral efficiency in un-coded CDMA system .

不编码系统达到最大频谱效率的调制方式不是阶数最高的调制方式。

This scheme is characteristic of simple structure , high spectral efficiency and suitable for long-distance transmission .

该方案具有配置简单、频谱效率高、适合长距离传输等特点。

Three different optimization objectives are compared through mathematical analysis and simulations on energy efficiency and spectral efficiency .

在三种不同优化目标下，通过数学分析和仿真，分别比较了系统的能量效率和频谱效率。

V-BLAST has demonstrated very high spectral efficiency , and can improve system capacity dramatically .

V-BLAST系统有着非常高的频谱利用率，可以显著地提高系统容量。

Asymptotic spectral efficiency of the multicarrier code division multiple access

多载波码分多址的渐进频谱效率

The main factor which wireless communication faces is spectral efficiency and multipath fading .

频谱利用率和信道衰落是无线通信系统需要面对的主要问题。

Two way relay is key branch in the research of relay due to its high spectral efficiency .

双向中继由于其独有的高频谱利用率的特性，一直以来都是中继理论研究的一个重要分支。

And how to improve the spectral efficiency has always been a main challenge in wireless communication research field .

因此，如何提高频谱利用率，一直以来就是无线通信领域研究的主要任务。

Because of its high capacity and large spectral efficiency , V-BLAST system became popular in recent years .

近年来，由于该系统具备较高传输容量和频谱利用率，而受到了广泛关注。

The spectral efficiency is analysed .

本文从频谱效率方面对其性能进行分析。

The spectral efficiency and pairwise error probability ( PEP ) is also considered .

随后讨论了该方案的频谱利用率和成对错误概率（PEP）。

Therefore , the main research topics in 4G are technologies providing higher performance and greater spectral efficiency .

因此，具有高频谱效率和高性能的通信技术成为第四代移动通信（4G）重要的研究开发目标之一。

Coherent optical transmission system has captured intensive attention for its higher spectral efficiency and greater bit rate .

由于相干检测系统有着更高的频谱利用率与传输速率，其受到国内外学者的青睐。

The maximum spectral efficiency in Rayleigh fading channel under average power constraint is first deduced .

首先推导了在平均发送功率受限条件下，瑞利衰落信道中最大频谱效率；

A High Spectral Efficiency Modulation Scheme for Turbo-Codes

Turbo码的高效调制方案

Without increasing the transmit power and system bandwidth , MIMO technology can greatly improve channel capacity and spectral efficiency .

MIMO技术可以在不增加发射功率与系统宽带的前提下，大幅度地提高系统的信道容量与频谱利用率。

The spectral efficiency with pilot symbol insertion is higher than that with continuous pilot signals .

采用符号导频方式的系统的频谱效率要高于采用连续导频方式的系统；