联合频率相位调制(JFPM)同时利用频率信息及相位信息，具有较高的频带利用率和功率效率。
Joint frequency and phase modulation (JFPM) utilize frequency and phase information to realize higher efficiency in the frequency and power.
高频雷达工作在十分拥挤的短波波段内，可资用的能满足信号调制的连续频带很难获得。
Operating in the heavy congested SW band, it is difficult for HFradars to find continuously useable waveband for signal modulation.
该方法能将各共振响应频带的调制频率提取出来。
This method possesses a powerful property to extract the modulated frequency of resonant frequency band overall.
在系统设计方面，选用2fsk调制方式，并从镜像频率的抑制等方面考虑，选择了合适的跳频频带。
The system chooses 2fsk modulation manner and appropriate hopping bandwidth from the aspect of mirror frequency restraining.
当进行高速水下通信时，由于水下信道的频带有限，扩频和MFSK调制方式无法解决高速率信息传输和可利用信道频带窄的矛盾。
Because of limited frequency band of channel, spread spectrum and MFSK modulations can not resolve that high speed transmission is in contradiction with limited frequency band.
研究了多频带干扰对超宽带调制技术性能的影响。
The influence of multi-band interference on ultra-wideband (UWB) communication is analyzed in this paper.
分析结果表明：在多信号输入时，输出功率中确实有输入信号的互调制分量产生，同时可以发现，对于宽频带的行波管，互调制分量对主工作频率输出功率有比较大的影响。
The results show that: when two signals are inputted into TWT, the output power includes the intermodulation components, and the intermodulation components have important effect on broadband TWT.
QPSK调制方式频带利用率高，因而在通信系统中被广泛采用。
QPSK is commonly used in communication because of its bandwidth efficiency.
调制器完成对输入信号的量化并对量化噪声进行整形，将有用信号频带内的低频噪声搬移至高频段。
The modulator quantizes the input signal and move the low frequency inband quantization noise to high frequency.
MSK调制在限频带、限功率的无线信道中传输性能尤为优越。
The transmission performance of the MSK modulator is very superior in a frequency band limiting and power-limiting radio channel.
针对跳频通信系统，提出一种非相干的，高频带利用率的调制方案。
This paper introduces a multipurpose digital demodulation method based on SDR, which is one kind of non-coherent demodulation types.
针对跳频通信系统，提出一种非相干的，高频带利用率的调制方案。
This paper introduces a multipurpose digital demodulation method based on SDR, which is one kind of non-coherent demodulation types.
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