tone modulation

Characteristics of dual-tone inter-modulation of the true logarithmic amplifier and its application in DBF were simulated.

对真对数放大器的双音互调特性及其DBF应用进行仿真验证。

During the conversation or telling stories, parents may strengthen the intonation of key words, use modulation in tone and constantly repeat some simple words.

在谈话或讲故事中，可以用加强语调的字眼、使用抑扬顿挫的方式以及不断重复一些简单的字。

Secondly, introduce discrete multi-tone modulation principle in detail, have a systemic and comprehensive analysis and explanation on minimum mean square error ( MMSE) channel shorten time domain equalizer design methods which are based on all kinds of cost functions, analyze their advantage and disadvantage.

详细介绍离散多音频调制原理，对MMSE信道缩短法和基于其他代价函数的时域均衡器设计方法的进行了系统全面的分析和阐述，分析了各自的优缺点；

From simulation results, the third-order inter-modulation distortion ratio ( IMD3) can be reduced by-10 dB on average when a two-tone signal is input. Finally, the bias-controlled predistorter has been used in OFDM system.

从仿真结果可以总结出，当系统采用双音信号作为输入时，功率放大器输出的三阶互调失真可以平均减少10dB。最后，将二极管偏压控制预失真器应用于OFDM系统中。

This paper, based on the measurement of the impedance-frequency characteristics and attenuation characteristics of the city telephone line network, proposes a method of FDM to transfer carrier signal, such as digital modulation signal, tone carrier signal, etc.

在对市内电话信道阻抗特性、衰耗特性测试的基础上，提出市话线路可采用频分复用的方法传递载波信号，如数字调制信号、语言载波信号等。