differential demodulation造句
例句與造句
- In the second part , the necessity of employing differential demodulation in rapid changing channel was explained , performance of multiple symbol detection of mdpsk and decision feed back multiple symbol detection were analyzed . then we present a new differential demodulation algorithm . the decision data is used to recover the carry phase . given the same observation intervals , this demodulation algorithm has almost the same performance , but the receiver is much more simplified
第二章首先指出了信道參數(shù)變化劇烈的情況下，采用差分解調(diào)的必要性；分析了多碼元差分解調(diào)和數(shù)據(jù)判決反饋解調(diào)算法的性能和抑制噪聲的能力；在此基礎(chǔ)上提出了一種新的差分解調(diào)方案：利用判決數(shù)據(jù)輔助進(jìn)行載波恢復(fù)，即在判決數(shù)據(jù)的輔助下，采用fir ( finantimpounsrespouns )結(jié)構(gòu)對載波相位進(jìn)行預(yù)測的一種算法，精心設(shè)計(jì)了該算法的實(shí)現(xiàn)結(jié)構(gòu)。 - This project study the all - digital modulation and demodulation of / 4 offset differentially encoded quadrature phase shift keying ( / 4 - dqpsk ) . then use / 4 - dqpsk digital modulation and baseband differential demodulation technology to implement digital signal transmission . the bite rate is 500kb / s and the intermediate frequency is 2mhz
本課題對/ 4 - dqpsk的全數(shù)字調(diào)制解調(diào)技術(shù)進(jìn)行研究,利用/ 4 - dqpsk數(shù)字調(diào)制和基帶差分解調(diào)技術(shù)實(shí)現(xiàn)數(shù)字信號的傳輸,實(shí)現(xiàn)傳輸碼率500kbps ,調(diào)制中頻2mhz 。 - This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga . this scheme adopts quadrature balanceable modulation , intermediate frequency sampling , digital matched filtering , delay differential demodulation techniques and so on . it directly processes the digital signals on intermediate frequency without down - conversion , and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits
本文采用了一種基于fpga的通用數(shù)字調(diào)制解調(diào)方案,該方案在調(diào)制端采用了正交平衡調(diào)制技術(shù),在解調(diào)端采用了中頻帶通采樣、數(shù)字匹配濾波、延時差分解調(diào)等技術(shù),直接在中頻上進(jìn)行數(shù)字信號處理,不需要進(jìn)行下變頻,也不需要增加額外的偽隨機(jī)碼同步捕獲和載波提取電路。 - It's difficult to find differential demodulation in a sentence. 用differential demodulation造句挺難的