Adaptive modulation and coding (AMC) can effectively improve the spectral efficiency for wireless data transmissions.
自适应编码调制(amc)技术可以有效地提高无线数据传输的频谱利用率。
LTE is aimed at providing the true global mobile broadband experience for users but also places high priority on improving spectral efficiency and reducing cost.
LTE致力于为用户提供真正的全球移动宽带体验，并且非常重视提高频谱的利用率和降低成本。
Because of the ability to combat multipath interference and high spectral efficiency, OFDM has become the first choice of physical layer technology in future broadband wireless access systems.
OFDM技术以其良好的抗多径干扰能力和高频谱利用率成为未来宽带无线接入系统的首选物理层技术。
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 area spectral efficiency of fully loaded cellular radio communication systems with variable-rate transmission is investigated.
研究采用可变速率传输的满负荷蜂窝无线通信系统的面积频谱效率。
The proposed scheme may be used for increasing spectral efficiency and all-optical logic device.
此方案可以提高光传输中的频谱效率，以及应用在全光逻辑器件领域。
MIMO relay channels, which combines the multiple antenna system and the relay, can improve the spectral efficiency of relay network.
MIMO中继技术结合了多天线系统和中继技术的优点，进一步提高了中继系统的频谱效率。
A downlink power allocation scheme was developed to improve the spectral efficiency of distributed wireless communication systems (DWCS).
为了提高分布式无线通信系统(DWCS)的频谱效率，提出了一种下行功率分配算法。
Total users and spectral efficiency are studied under different proportion of total available bandwidth that is allocated to OCDMA and WDMA.
当可用带宽在WDMA与OCDMA之间不同的分配情况下，研究了该混合系统的总用户数和频谱效率。
Without any exhaustive numerical search, the ERQ can increase the spectral efficiency with the optimal continuous rate and power adaptation.
不需要大量计算，ERQ可以通过最佳连续码率和功率适应提高频谱效率。
Compared with existing protocols, improved ones enjoy better performance in terms of spectral efficiency or transmission reliability, respectively.
相比原有协议，改进方案分别在频谱效率或传输可靠性方面有不同程度提升。
The growing demand for wireless services has created the need for improving the spectral efficiency of wireless communications over fading channels.
日益增长的无线业务需求要求提高衰落信道上无线通信的频谱利用率。
It has increased connectivity and energy efficiency, improved network coverage, increased spectral efficiency and increased network capacity and so on.
它具有提高连接性能和能量效率、提高网络覆盖率、提高频谱效率、增加网络容量等优点。
Considering the practical case of delayed feedback environment, the closed-form expressions of system spectral efficiency under delayed channel were derived.
考虑反馈信道存在延时的实际情况，推导了系统在延时信道条件下的频谱效率表达式。
The peak spectral efficiency of MMSE detectors decreases as the number of transmission antennas increases and increases as the number of receiving antennas increases.
线性MMSE检测子的峰值频谱效率与发送天线数有关，随发送天线数的增加而减小，随接收天线数的增加而增大。
LTE system adopts MIMO and OFDM as its two most important fundamental techniques, so as to respond to the requirements of large capacity and high spectral efficiency.
LTE系统采用多输入多输出(MIMO)和正交频分复用(OFDM)作为两大主要技术以应对系统大容量与高频谱利用率等需求。
Power Allocation(PA) and Space Time Codes(STC) are the key techniques of the Multiple-Input Multiple-Output(MIMO) to increase spectral efficiency and improve performance.
运用功率分配和空时编码技术可以在MIMO系统中提高频谱效率、改善系统性能。
The author has described several key techniques for improving the capacity of CDMA digital celullar system, comparing to the spectral efficiency of FDMA and TDMA cellular system.
本文对照频分多址和时分多址系统的频谱效率，阐述了码分多址系统提高系统容量的几项关键技术。
The advantages of CDMA communication system in 3g are large capacity, soft capacity, soft handover, higher spectral efficiency and the ability to resist the effects of multi-path fading, and so on.
CD MA通信系统由于具有容量大、软容量、软切换、频率利用率高、抗多径衰落能力强等优点而在第三代移动通信系统(3 G)中得到广泛应用。
Simulation results indicate if the spectral efficiency is less than some certain value, the performance of amplify-forward and network coding forward are much better than that of direct transmission.
仿真实验得到：频谱效率小于一定值的情况下，利用放大和网络编码转发方式的性能大大高于直接传输方式。
Simulation results indicate if the spectral efficiency is less than some certain value, the performance of amplify-forward and network coding forward are much better than that of direct transmission.
仿真实验得到：频谱效率小于一定值的情况下，利用放大和网络编码转发方式的性能大大高于直接传输方式。
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