free symbol 中文意思是什麼
free symbol
解釋
自由符號-
It is a new and shining symbol of man's yearning to be free.
它是人類渴望自由的一個新而耀眼的象徵。 -
By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading
結合理論和實驗模擬結果，分析討論了衛星通信中的各種恆包絡調制技術，對它們的調制原理，相位路徑，已調波包絡，功率譜密度，誤碼性能，以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。 -
Based on the cyclic prefix property of the guard intervals, it provides estimates for sampling positions of isi - free region by combining the techniques of delay conjugate multiplication, phase difference, symbol - by - symbol average, and edge detection
以護衛區間循環前置的特性為基礎，結合延遲共軛相乘、相位差分、符元對符元之區段式平均以及邊界偵測等技術來估計非碼際干擾區間的位置。 -
In the invention, it is easy to determine a threshold for directly separating the isi region and thereby most isi - free symbol information can be extracted
本發明比較容易訂出一個門檻來直接將碼際干擾區間分隔開來，並且可以取到絕大部分不受碼際干擾的符元資料。 -
As the important symbol of social progress and civilization, to build up an obstacle - free environment has become the worldwide common topic
摘要作為社會進步和文明的重要標志，建設無障礙環境已成為全球共同的課題。
分享友人