例句與造句

1. Non - coherent demodulation of bpsk signal based on time measuring
   信號非相干解調(diào)方法
2. The coherent demodulation and adaptive demodulation are both realized in these forementioned systems in system view , and the corresponding theory is proved by analyzing and comparing in simulation
   在systemview中仿真實現(xiàn)了上述信號的相干解調(diào)和自適應(yīng)解調(diào)兩種方法,并模擬通信的實際環(huán)境分析對比解調(diào)性能,驗證前述的理論分析。
3. However , the high demand in frequency domain involves precise synchronization both in time and frequency domain . while because of the different channel characteristics in each channel , the receiver needs some mechanisms to characterize the channel effects in coherent demodulation
   然而，頻域的高要求對應(yīng)于同步技術(shù)的高要求；另外，各個子信道不同的信道特征，要求接收端相關(guān)解調(diào)用一定的機制來近似每個子信道的信道特征。
4. The conclusion is identified by computer simulation . the paper studies a noncoherent demodulation based on differential encoding in mc - cdma system and makes computer simulation of ber performance compared with that of coherent demodulation based on perfect channel estimation
   研究分析了一種使用差分編碼的非相干接收mc - cdma系統(tǒng)，對頻率選擇性瑞利衰落信道條件下的誤碼率性能進行了計算機仿真，并且和基于理想信道估計的相干解調(diào)方案進行了比較。
5. Following this , the thesis research digital demodulation of qpsk and analyze the digitalizing means of key module . digitalizing demodulation arithmetic is given . the thesis also researched in phase ambiguity of coherent demodulation , and then brings forward a new method for settling phase ambiguity
   而后研究了qpsk的數(shù)字化解調(diào)，分析了關(guān)鍵模塊的數(shù)字化方法，給出了數(shù)字化解調(diào)算法，并研究了相干解調(diào)中的相位模糊問題，提出了一種解決相位模糊的新方法。
6. It's difficult to find coherent demodulation in a sentence. 用coherent demodulation造句挺難的
7. Firstly , on the base of analyzing psk ' s theory and audio - card ' s constitute and data transfers , bdpsk and qdpsk soft - modulation and soft - demodulation systems based on audio - card are studied and implemented , including generating digital carrier sequence , synchronizing carrier , designing filter , sampling and judging , etc . the system adopts coherent demodulation method , synchronizing carrier adopts costas loop
   本文首先分析了調(diào)相信號調(diào)制解調(diào)的基本理論和多媒體計算機( mpc )聲卡組成原理及數(shù)據(jù)傳輸?shù)确矫娴膬?nèi)容，然后研究并實現(xiàn)了基于計算機聲卡的bdpsk和qdpsk信號軟件調(diào)制解調(diào)系統(tǒng)，內(nèi)容包括數(shù)字載波序列的產(chǎn)生、載波同步、濾波器設(shè)計，信號的抽樣判決等。
8. Second , this paper design the simulation scheme of bicm for comparing the performance over fading channel and awgn channel that combine 2 / 3 rate , 4 states punctured convolutional code with 8psk modulation , matching block interleave or random interleave , transform through rayleigh channel or awgn channel and use the way that combine coherent demodulation with viterbi decoding in receiver . design the scheme of bicm _ id that use the iterative decoding technique and the scheme of tcm for compare
   為了驗證bicm和bicm _ id在衰落信道和加性高斯白噪聲信道( awgn )下的性能,設(shè)計了一個2 / 3碼率, 4狀態(tài)的鑿孔卷積碼經(jīng)過塊交織或隨機交織,與8psk調(diào)制相結(jié)合,在rayleigh信道下或awgn信道下傳輸,接收端采用相干解調(diào)與維特比譯碼相結(jié)合的bicm方案,在接收端引入迭代反饋譯碼的bicm _ id方案,以及與之相比較的tcm方案。