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系統中進行數據傳輸時如何保證通信的可靠性,也即如何設計合理的糾錯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,數字電視系統采用的信道編碼方案為rs碼或卷積碼,或二者的級聯碼,它的糾錯性能與香農極限相比,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 仿真結果表明,在解調觀測長度相同的情況下,其性能和多碼元差分解調方式大致相同,但大大簡化了接收機結構。
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 ] 同樣的方法也已經在其它編碼方案中用于改善解碼信號的質量,減小各類噪聲,例如振鈴、斑點和哼聲。
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,對小波變換結合矢量量化技術的特點作出分析和總結。
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)包含許多單字節代碼方案無法表示的字符,因此要求使用多字節字符集( 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 卷積碼被運用于衛星通信和無線通信系統中,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 自適應編碼技術可以有效的提高無線通信頻譜利用率,在第三代移動通信系統中已經成功的運用了基于turbo碼的自適應編碼技術。
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,本文對編碼方案中采用的關鍵差錯圖像恢復算法?雙向塔式算法在圖像恢復質量和計算開銷兩個方面進行了分析與改進。