data symbol造句
例句與造句
- Planar double - enveloping worm gearing geometrical data symbols
平面二次包絡(luò)環(huán)面蝸桿傳動幾何要素代號 - End - data symbol
數(shù)據(jù)終端符號 - When ccc are used for spreading codes , multiple access interference ( mai ) is zero theoretically even under asynchronous transmission . if cc / ccc are used for spreading codes , one data symbol could be transmitted during one - chip duration
若采用互補碼作為擴頻碼，理論上而言，不管在同步模式還是異步模式下，都不存在多址干擾；又可用特殊的調(diào)制方式做到在1個碼片的時間內(nèi)傳輸一個數(shù)據(jù)符號。 - And it presents an estimation method for frequency difference by means of data synchronization selecting the time window of afc frequency difference estimation hi order to solve the problem that data symbol transition induces an enormous error of frequency difference estimation
針對afc頻差估計中數(shù)據(jù)突變引起頻差估計較大誤差的問題，提出了利用數(shù)據(jù)符號同步對afc頻差估計時間窗口選擇的afc頻差估計方法。 - With mc - cdma , each data modulated chip of the user specific spreading code is mapped onto a separate subcarrier after spreading and scrambling , so that the chips of the spreading code and , hence , the data symbol is transmitted in parallel on multiple subcarriers
Mc - cdma是將多載波技術(shù)應(yīng)用于cdma中，兼具cdma和ofdm這兩種技術(shù)的特點。在mc - cdma中，用戶的信息符號先經(jīng)過擴頻、加擾，再將擴頻序列的碼片并行地在多個子載波上傳輸。 - It's difficult to find data symbol in a sentence. 用data symbol造句挺難的
- But the frequent use of training sequence is certainly a waste of channel bandwidth . research shows that with the prior knowledge of only the signature waveform and timing of the user of interest , blind adaptive multiuser detector can effectively detect data symbol of the desired user without training data sequence for every active user
在傳統(tǒng)多用戶檢測技術(shù)基礎(chǔ)上，自適應(yīng)多用戶檢測利用訓(xùn)練序列在僅知道期望用戶地址pn碼及其定時信息條件下就可以進行檢測，不足的就是訓(xùn)練序列占用了額外的頻率資源。 - Due to the multi - carrier transmission technology used in mc - cdma systems , almost all the previous synchronization algorithms in mc - cdma systems are derives from that in ofdm systems . they are suitable for ofdm systems , but they are not optimal for mc - cdma systems . the data symbols transmitted in mc - cdma systems have form of cdma signal , which is greatly different from normal binary signal
傳統(tǒng)的各種mc - cdma同步算法主要還是借鑒了ofdm的同步算法，本文提出采用用戶擴頻碼作idft后在fft之前作同步，充分利用了ofdm信號中所包含的mc - cdma信號形式，它與純粹的ofdm傳輸?shù)亩M制數(shù)據(jù)不同，它與pn序列具有更好的相關(guān)性。