sequence symbol 中文意思是什麼
sequence symbol
解釋
順序符號-
For wireless communications, direct sequence code division multiple access ( ds - cdma ) techniques have received a great deal of attention due to the expectation of capacity increase, interference rejection capability, security, and so on. in a high data rate application such as multimedia services, however, the capacity of ds - cdma systems is limited by both the inter - chip, or inter - symbol interference
Cdma技術以其高抗干擾能力、高容量、高保密性等技術優勢在第三代移動通信系統中被廣泛應用，然而在高速數據業務中，嚴重的碼間干擾和符號間干擾會導致系統性能明顯下降。 -
If we want to change the sequence of operation, we will use the brackets ; if we can ' t finish the dividing, we should keep the hundredth in the decimal, using the symbol approximate
當改變算式中的運算順序時，要用到小括號，如果遇到除不盡的時候，要保留兩位小數，取近似值用「 」表示 -
This is achieved by ensuring thatany sequence of symbols formed by portions of two adjacent code words differs in at least one symbol from any valid word
這可通過下述方法做到：保證兩個相鄰碼字的部分組成的任意符號序列與任一有效碼字至少有一個符號不同。 -
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
在傳統多用戶檢測技術基礎上，自適應多用戶檢測利用訓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，不足的就是訓練序列佔用了額外的頻率資源。 -
The conventional equalizer resort to a training sequence in order to overcome inter - symbol interference. but this method would influence communication efficiency
傳統均衡器克服isi的方法是發送訓練序列，但是這會影響通信的效率。 -
Computer program shall mean a sequence of code - based instructions that can be executed by such devices having information processing capacity as computer for achieving a certain result, or a sequence of symbol - based instructions or expressions that can be automatically converted into a sequence of code - based instructions. the source program and the object program in a computer program shall be an identical work. documentation shall mean the written materials and diagrams, such as the program design specifications, flow charts and operating manual, which are used to describe the contents, elements, design, functions and specifications, development, testing results and operating method of the program
專利法已經指出發明是對產品方法或者改進所提出的技術方案，那麼，如果計算機計算機程序屬於一項發明的組成部分，如果該計算機程序不僅僅涉及數學演算法或數學方法而是涉及了某種技術概念，具體說就是該計算機程序與某一項技術領域相關，至少涉及了一個技術問題並且還能夠產生一定的技術效果，那麼這種發明中所涉及的計算機程序，我們就稱之為技術性的計算機程序，是可以屬于專利法保護范圍的但是還必須注意，這種具有技術性的程序能否滿足發明專利授予的必要條件，即： 1構成一個完整的技術方案2該技術方案符合專利法規定的新穎性實用性創造性條件。 -
Secondly, the dissertation proposes a novel blind symbol - timing scheme for ofdm systems based on cyclostationarity feature of received symbols. the proposed schemes also exploits the periodicity of ofdm symbol introduced by cyclic prefix, by applying 2 - dimentional fourier transformation and choosing the appropriate correlation peak value as the symbol start location, the precision of this scheme is higher than previous conventional method. thirdly, the dissertation presents analysis with regard to channel estimation of ofdm systems. several interpolation algorithm in ofdm systems which based on pilot sequence have been analyzed in the first instance, and the influence of the channel noise on interpolation precision has discussed. the theoretic analysis and simulation results show that : the interpolation error induced by the precision of interpolation procedure itself has out weight
第三，論文在ofdm系統的通道估計方面，先對基於導頻的ofdm通道估計中的多種插值方法進行了分析，討論了噪聲對插值精度的影響，指出插值本身的精度所造成的插值誤差遠大於噪聲所帶來的插值誤差，從而階次更高的插值演算法在實用中並非最優的;並指出插值濾波法比變采樣率演算法對噪聲的影響更為敏感，在信噪比較高時插值濾波演算法比變采樣率演算法更優。 -
Computer program shall mean a sequence of code - based instructions that can be executed by such devices having information processing capacity as computer for achieving a certain result, or a sequence of symbol - based instructions or expressions that can be automatically converted into a sequence of code - based instructions
（一）計算機程序，是指為了得到某種結果而可以由計算機等具有信息處理能力的裝置執行的代碼化指令序列，或者可以被自動轉換成代碼化指令序列的符號化指令序列或者符號化語句序列。 -
The correlation detection using the periodicity of the direct sequence autocorrelation function can estimate the symbol period at intermediate frequency or at baseband. simulation results indicate that the former is superior to the latter when the demodulated frequency is unequal to the carrier frequency
時域相關檢測方法利用擴頻信號的周期自相關特性，能在中頻和基帶對擴頻碼周期進行估計，模擬結果表明中頻檢測時性能較好。 -
The method was correlate search and fft carrier detection, which could solve the problem of the capture of the spread spectrum code under the condition of low snr and big frequency offset. we also put forward a method, shift receiving window and correlate with local sequence, which not only could solve the problem of symbol synchronization but also could acquire the statistics of the multipath. then we utilized the results of the channel estimation and the technology of rake receiver to decode the received spread spectrum sequence and acquire rude information
方案中提出了：相關搜索、 fft檢測信號載波的方法，解決了低信噪比、大頻差條件下擴頻碼的同步捕獲難題；滑動相關完成位同步的方法，解決了低信噪比下的同步問題；在時域利用相關進行通道估計，然後利用rake接收技術完成相關解擴的方法，一定程度上解決了多徑衰落影響解擴性能的問題。 -
Bound symbol sequence
連續符號順序 -
Usually in ofdm system, the time - domain synchronization in the platform is the symbol - frequency synchronization using pn - sequence preambles. its algorithm has been designed based on the requirement of platform, and validated by matlab simulation. then the verilog program has been designed based on this algorithm
測試平臺中的時域同步是ofdm系統下基於pn序列的符號和頻率同步，其演算法是根據融合方案時域同步演算法，同時結合測試平臺系統要求設計的，演算法性能已經通過matlab模擬得以驗證。 -
In order to solve several problems when studying visualization of multi - source spatial data, the authors propose two new conceptions, display sequence control and symbol display control style, the former is used to manage visualization of multi - source data ; and the latter is used to solve problems of set of map symbol style at different display scale
摘要提出了顯示順序控制和符號顯示控制樣式兩個新概念，解決了多源數據的綜合管理顯示問題，改善了地圖要素在不同顯示比例尺段的顯示效果。
分享友人