Mandarin speech synthesis based on pitch synchronous time-frequency interpolation 基于基音同步的時(shí)頻域插值的漢語語音合成
Diversity receiving technique for synchronous time spreading signal in time-varying fading channels 時(shí)變衰落信道中同步時(shí)間擴(kuò)展信號的分集接收技術(shù)
Vdl mode 4 adopts the short frame structure to transmit data, the synchronous timing signal of vdl mode 4 is offered by gnss 本文完成了對vdl-4協(xié)議棧的研究和初步開發(fā)的任務(wù)。
Bits supplies the synchronous timing signal to these equipments inside the telecommunicationt building, such as dps, atm, no . 7, dxc, tm & adm in sdh, don and in etc . the related techniques are involved in the content of synchronization ne twork, timing distribution, the timing signal transportations x impairments etc . the second chapter tells the structure and the function of the building integrated timing system . the third chapter summarizes the digital synchronization network techniques, which emphasizes the basic concept of synchronization networks analyzes the necessity of building the synchronization network and introduces all kinds of synchronization methods . the fourth chapter represents the transportation of the synchronization signal 本文第二章講述了通信樓綜合定時(shí)系統(tǒng)的構(gòu)成及作用:第三章概述了數(shù)字同步網(wǎng)技術(shù),著重描述了同步網(wǎng)的基本概念,分析了建立同步網(wǎng)的必要性,講述了各種同步方法;第四章闡述了同步定時(shí)信號的傳輸;第五章介紹了bits設(shè)備所支持的同步狀態(tài)消息;第六章、第七章為本文的重點(diǎn),通過對時(shí)鐘信號建立數(shù)學(xué)模型,從理論上分析時(shí)鐘內(nèi)部噪聲和相位瞬變產(chǎn)生時(shí)鐘定時(shí)信號損傷的原理,企圖尋找到更好地控制頻率漂移的方法。
This thesis detailedly researches into source authentication, introducing and analyzing some previous source authentication methods . it analyzes a source authentication method ( tesla ) which is being paid more and more attention nowadays, its function, shortcoming and current improvement, and points out its secure vulnerability . we draw a conclusion : though tesla has many advantages, such as the low communication cost, tolerance of pack loss, there are still many problems, which mostly arise from the requirement of synchronous time 并對其中一種目前廣泛受到人們關(guān)注的源認(rèn)證方法tesla協(xié)議進(jìn)行了研究,包括對tesla的功能、原理、缺陷以及現(xiàn)有的改進(jìn)做了分析,指出其中的安全漏洞,并得到以下結(jié)論:盡管tesla有許多優(yōu)點(diǎn),如低通訊成本,較好的抗丟失性,但它仍然存在許多難以克服的缺陷,而這些問題主要是由于tesla所依賴的時(shí)間同步機(jī)制在現(xiàn)有網(wǎng)絡(luò)環(huán)境下不易實(shí)現(xiàn)所帶來的。