系统码 meaning in English
system code
systematic code
Examples
- Transmission system codes
传输系统码 - We can reduce the isi and noise by elaborately designing transmitting filter and the receiving filter when the channel is known and unaltered . however , the factual channel is time - varying and not known entirely . so the isi is always existent
在信道特性已知且恒定的情况下,通过精心设计发送和接收滤波器就可以消除码间干扰和使噪声的影响最小,但实际信道既不可能完全知道,也不可能恒定不变,系统码间干扰总是存在。 - Du pingzhou ( computer application ) directed by prof . sun huixian error - correction coding is used widely in satellite communications , mobile communications and data storing . reed - solomon code is one of the most useful error - correction codes , which has been accepted by ccsds aos as part of standard protocol
很多国际标准采用了rs码，比如空间数据系统咨询委员会（ ccsds ）在遥测信道编码的建议书中将rs ( 255 , 223 )系统码作为标准使用，高级在轨系统（ aos ）也采用了rs码。 - Such code is also called gradually good code or shannon code . in 1993 , c . berro etc . firstly proposed a new channel code method - turbo code , which employed recursive systematic code 、 the random interleaver 、 map ( maximum a posteriori ) algorithm and iterative decoding algorithm obtained the capacity that had only 0 . 7db difference compared to the shannon limitation
1993年c . berro等首先提出了一种全新的信道编码方式? turbo码，采用递归系统码与随机交织器构造turbo码，并将map ( maximumaposteriori )算法和迭代算法应用于解码过程，获得了与香农理论极限仅差0 . 7db的性能。