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。
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 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。
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。
Simulation results show that the system can get satisfactory image communication performance in the very high spectral efficiency situation over the flat fading channel.
仿真结果表明，在慢衰落无线信道图像传输中，系统能获得满意的图像传输质量和很高的频谱利用率。
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。
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。
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。
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。
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。
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