This paper mainly discusses how to guarantee information ' s reliable transmission in a type of ssr system . proper channel - coding scheme is designed to decrease error - rate in digital transmission 本文主要研究在二次雷達(dá)系統(tǒng)中進(jìn)行數(shù)據(jù)傳輸時(shí)如何保證通信的可靠性,也即如何設(shè)計(jì)合理的糾錯(cuò)碼方案以減少誤碼率。
Conventionally , dtv systems adopt coding schemes such as rs or convolutional codes , or concatenated codes , where the error correction performance is still quite far away from the shannon limit 通常的,數(shù)字電視系統(tǒng)采用的信道編碼方案為rs碼或卷積碼,或二者的級(jí)聯(lián)碼,它的糾錯(cuò)性能與香農(nóng)極限相比,仍有一定的距離。
In the third part , a new adaptive trellis coded modulation ( atcm ) solution was presented . we analysis the best coding scheme in different channel modes , different snr and different demodulation solution 仿真結(jié)果表明,在解調(diào)觀測(cè)長(zhǎng)度相同的情況下,其性能和多碼元差分解調(diào)方式大致相同,但大大簡(jiǎn)化了接收機(jī)結(jié)構(gòu)。
The same types of approaches have been used in order to improve the quality of decoded signals in other coding schemes , reducing different kinds of artifacts , such as ringing , blurring and mosquito noise [ 3 . 34 , 3 . 35 ] 同樣的方法也已經(jīng)在其它編碼方案中用于改善解碼信號(hào)的質(zhì)量,減小各類噪聲,例如振鈴、斑點(diǎn)和哼聲。
It gives three effective coding schemes , firstly it reviews the fundamental theory of vector quantization and its current algorithms , then it analyzes and summarizes characteristics of wavelet image quantization with vq 首先回顧了矢量量化的基本原理和一般算法,對(duì)小波變換結(jié)合矢量量化技術(shù)的特點(diǎn)作出分析和總結(jié)。
However , some non - european character sets , such as japanese kanji , include many more characters than a single - byte coding scheme can represent , and therefore require multibyte - character set mbcs encoding 但是,一些非歐洲字符集(如日文漢字)包含許多單字節(jié)代碼方案無(wú)法表示的字符,因此要求使用多字節(jié)字符集( mbcs )編碼。
Convolutional coding is a coding scheme often employed in deep space communications and recently in digital wireless communications . it offers an alternative to block codes for transmission over a noisy channel 卷積碼被運(yùn)用于衛(wèi)星通信和無(wú)線通信系統(tǒng)中,它提供了一種不同于分組碼的在噪聲信道下傳輸信息的一種編碼方案。
Adaptive coding technology is often used to improve frequency efficiency of wireless communication system as we know that the adaptive coding scheme based on turbo codes has been carried out in 3g systems 自適應(yīng)編碼技術(shù)可以有效的提高無(wú)線通信頻譜利用率,在第三代移動(dòng)通信系統(tǒng)中已經(jīng)成功的運(yùn)用了基于turbo碼的自適應(yīng)編碼技術(shù)。
Also , the quality of reconstructed images and the calculation cost of duplex pyramid algorithm , used in coding scheme as the key error images reconstruction algorithm , are analyzed and modified in the paper 并且,本文對(duì)編碼方案中采用的關(guān)鍵差錯(cuò)圖像恢復(fù)算法?雙向塔式算法在圖像恢復(fù)質(zhì)量和計(jì)算開銷兩個(gè)方面進(jìn)行了分析與改進(jìn)。