fm-pm 中文意思是什麼
fm-pm
解釋
頻率-
Upon high doping, fm state separates from pm state above tc, which is called phase separation
表明在居里溫度以上鐵磁相從順磁相中分離出來，即相分離。 -
Internal am, fm, pm, fsk, and pwm modulation make it easy to modulate waveforms without the need for a separate modulation source
內部am fm pm fsk和pwm調制使儀器能容易地調制波形，而不需要單獨的調制源 -
This paper discusses the hardware system architecture of broadband software radio experiment platform, designs hardware circuit system, studies the basic theory of software radio deeply, establishes the mathematical model. the platform is made up of a / d ( ad6640 12bit 65 msps ), orthogonality transform, digital filtering and dsp, etc. the platform can demodulate pcm - am / fm / pm / ask / fsk / psk / qpsk, pcm - cdma - psk, pcm - qpsk signal
本文論述了寬帶軟體無線電接收實驗平臺硬體系統的體系結構，設計了硬體電路系統，深入研究了軟體無線電的基本理論，建立了接收實驗平臺的數學模型。該平臺由高速a d變換器（ ad664012位65msps ） 、正交變換、數字濾波器、 dsp等部分構成。實現了pcm - am fm pm ask fsk psk qpsk ， pcm - cdma - psk qpsk調制方式的解調功能。
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