Because high-speed data take up wide bandwidth, looking for one which have high efficiency modulation scheme and suitable for frequency hopping communication system is needed.
由于高速数据占用更宽的带宽，所以在调制制式上应该寻找一种适合于跳频通信特点的具有高频谱效率的调制方案。
FQPSK is a modulation technique that fits for high spectrum efficiency and high power efficiency request.
FQPS K是针对高频谱效率和高功率效率要求产生的一种调制方式。
As a new communication technology, PPM (pulse position modulation) technology can be easily coded, and has a high efficiency of energy transmission.
PP M脉冲位置调制通信技术作为一种新兴的通信技术，具有编码简单、能量传输效率高的优点。
QAM (Quadrature Amplitude modulation) has been widely used in various digital communication systems due to its high modulation efficiency.
正交幅度调制(QAM)具有较高的调制效率，被广泛应用于各种数字通信系统中。
Therefore, it has a practical significance to develop some fit methods of modulation with high spectrum efficiency for shortwave FH communication system.
因而，研究适合于高速数据传输的跳频通信特点且具有高效频谱利用率的调制技术具有重要的实际意义。
Test results show that the continuous control method during over-voltage modulation period features simplicity, high efficiency and excellent control effect.
试验结果表明，过调制区连续控制方法简单、高效、控制效果良好。
The controller combines parallel amplification and drain modulation of the CMOS class-E power amplifier to provide high efficiency over a broad range of output powers.
结合射频E类功率放大器的结构特点，采用CMOS工艺，达到了在大的输出功率范围内保持持续稳定高效率的目的。
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。
Continuous Phase Modulation (CPM) is widely used in wireless communications especially in military communications due to its high power and bandwidth efficiency.
连续相位调制(CPM)以其较高的功率有效性和带宽利用率，在无线通信领域尤其是军事通信领域得到广泛应用。
Continuous Phase Modulation (CPM) is widely used in wireless communications especially in military communications due to its high power and bandwidth efficiency.
连续相位调制(CPM)以其较高的功率有效性和带宽利用率，在无线通信领域尤其是军事通信领域得到广泛应用。
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