in the first stage, due to the research in years on the magnetic field modulation type doubly fed brushless machine, two doubly fed generators was requested to fabricate 首先,利用我們研究所在磁場(chǎng)調(diào)制式無(wú)刷雙饋電機(jī)的多年研究成果,研制并測(cè)試兩臺(tái)無(wú)刷雙饋發(fā)電機(jī)。
the recognition method for analogue modulations has less computational complexity, and the method for digital modulation has flexibility and can be easily extended to the coming modulation types 本文的模擬調(diào)制識(shí)別算法具有運(yùn)算量小的特點(diǎn),而數(shù)字調(diào)制識(shí)別算法具有較好的擴(kuò)展性。
automatic recognition of modulation signals is a required function of software-defined radio receiver . the automatic classification of modulation types is being discussed recently and there are so many ways 信號(hào)調(diào)制樣式的自動(dòng)識(shí)別是軟件無(wú)線(xiàn)電接收機(jī)必須具備的功能之一,調(diào)制識(shí)別是近年來(lái)信號(hào)處理領(lǐng)域研究的熱點(diǎn)問(wèn)題。
as the parts of sdr, such system should also be extensible . any modulation types, if can use complex carrier orthogonal modulation, such as am, ask, msk, qam, etc, can be used in the system 這種模型的可擴(kuò)展性和移植性均很強(qiáng),只須加入部分功能模塊即可實(shí)現(xiàn)多種調(diào)制,文中給出了實(shí)現(xiàn)am、ask、msk和qam調(diào)制的具體算法。
pulse signal is connected by the customer . signal can be sine wave or square wave . modulation frequency can be to 1mhz few model can be to 10mhz; inner modulation type no need signal from out side 外調(diào)制式激光器留有專(zhuān)用的信號(hào)接口,由用戶(hù)接入脈沖信號(hào),信號(hào)可以是正弦波,也可以是方波,調(diào)制頻率可到1mhz個(gè)別型號(hào)調(diào)制頻率可到10mhz。