Forward error correction ( fec ) has been widely used in the modern communication system 在現(xiàn)代通信系統(tǒng)中,前向糾錯(cuò)( fec )得到了廣泛的應(yīng)用。
This thesis presents a forward error correction ( fec ) algorithm and its circuit implementation , which is used in the wireless digital audio transmission system . also , an entire demo platform is built and error - correction ability of the system is tested based on this platform 本文研究了一種應(yīng)用于數(shù)字音頻無線傳輸系統(tǒng)中的前向糾錯(cuò)( fec )算法和相應(yīng)的電路設(shè)計(jì),搭建了一個(gè)硬件驗(yàn)證平臺,并在驗(yàn)證平臺上完成了電路的誤比特率測試。
In this paper , we analyze the statistic characters of time - delay in detail , and put forward to adopt elman nn to forecast time - delay intelligently , design appropriate compensator based on adaptive smith forecast theory . the experiment results prove that this method can improve the forecast accuracy and system ' s dynamic performance . in the application of real time data transmission , forward error correction ( fec ) is a good method to resume the lost data 針對這個(gè)問題本文進(jìn)行了詳盡的統(tǒng)計(jì)特性分析,并且提出采用elman動(dòng)態(tài)神經(jīng)網(wǎng)絡(luò)結(jié)構(gòu)對網(wǎng)絡(luò)時(shí)延進(jìn)行智能預(yù)測,并根據(jù)自適應(yīng)smith預(yù)估補(bǔ)償控制原理設(shè)計(jì)合適的時(shí)延補(bǔ)償器,并且應(yīng)用于基于web的二階水位控制系統(tǒng)中,實(shí)驗(yàn)結(jié)果證明了采用此方法可以提高預(yù)測精度,使時(shí)延補(bǔ)償器適應(yīng)時(shí)延變化的動(dòng)態(tài)性更強(qiáng),從而在保證系統(tǒng)穩(wěn)定性的基礎(chǔ)上,西安理工大學(xué)碩士學(xué)位論文提高系統(tǒng)的時(shí)延補(bǔ)償精度。