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。
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。
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。
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。
This type of devices are required to have high-speed, high quantum efficiency and ultra-narrow spectral linewidth simultaneously.
这类器件需要同时具备高速、高量子效率、超窄光谱响应线宽的性能。
The results show that the high spectral beam combining efficiency for more beams can be obtained by this method, which provides a doable way for high power laser.
当光谱宽度较窄时，实现多路光束较高的合成效率是可行的，这为高能激光的获得提供了一种确实可行的方法。
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。
Nevertheness, the pseudo-spectral method has a high computation speed and computational efficiency and can reflect the propagation rules of the wave field in medium visually and effectively.
尽管如此，伪谱法计算速度快，计算效率高，能够直观、高效地反映介质中波场的传播规律。
Nevertheness, the pseudo-spectral method has a high computation speed and computational efficiency and can reflect the propagation rules of the wave field in medium visually and effectively.
尽管如此，伪谱法计算速度快，计算效率高，能够直观、高效地反映介质中波场的传播规律。
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