Bit synchronization circuit design for digital communication system 數(shù)字通信系統(tǒng)位同步電路設(shè)計(jì)
The field of video signal processing is now undergoing a digital reform . the digital processing technique is clearly expatiated in this paper , such as a / d convert , anti - alias filter , clamp control , gain control , pll , synchronization circuit , color decoder , comb filters 本文詳細(xì)敘述了視頻圖像的數(shù)字處理方法,重點(diǎn)介紹了視頻信號(hào)數(shù)字化技術(shù)、抗混疊濾波器、箝位、增益控制、鎖相技術(shù)、同步時(shí)鐘產(chǎn)生、電視信號(hào)亮色分離、彩色解碼等技術(shù),這些關(guān)鍵技術(shù)為視頻信號(hào)的數(shù)字化處理提供了重要的基礎(chǔ)。
Then , introducing something about spread spectrum technique . and deciding to select direct - sequence spread spectrum ( ds ) in underwater acoustic communications by comparing ds to fh according to the properties of underwater acoustic channels . after that , discussing something about rake receiver , simulating the path - search algorithms , synchronization circuits and rake receiver in low speed underwater acoustic communications and analyzing some major factors influencing the performance of systems 然后介紹了rake接收技術(shù)的基本原理,并對(duì)rake接收系統(tǒng)中的路徑搜索和同步系統(tǒng)進(jìn)行了討論和仿真分析,另外還對(duì)rake接收技術(shù)在低速水聲通信系統(tǒng)中的應(yīng)用作了仿真分析,并討論了一些影響rake接收系統(tǒng)性能的主要因素。