论文部分内容阅读
现有的主要数字磁记录方式均可统一周游程长度受限码(RLLC)来描述,码的结构参数(d,k;m,n)与记录方式的主要性能参数有密切关系.本文归纳了RLLC的一般设计方法,在分析Gabor自适应码的构造的基础上,提出构造d=0,k=2的一种优质RLLC的方法.作者提出的(0,2;5,6)码较Gabor(0,1;2,3)码及GCR(0,2;4,5)码具有较高的编码效率和较宽的检读窗宽,又保持与GCR(0,2;4,5)码相同的自同步能力和信道带宽,因而有可能进一步提高数字磁纪录的记录密度及检读的可靠性.在理论分析的基础上,作出还给出这种优质RLLC的实际编码方案(编码规则和编/译码器的框图).
The existing main digital magnetic recording methods can all be described by RLLC, and the structural parameters (d, k; m, n) of the codes are closely related to the main performance parameters of the recording method. Based on the analysis of the construction of Gabor adaptive codes, a general design method of RLLC is proposed to construct a good quality RLLC with d = 0 and k = 2. The authors propose that (0, 2, 5, 6) (0, 1, 2, 3) codes and GCR (0, 2, 4, 5) codes have higher coding efficiency and wider reading window width, The same self-synchronizing ability and channel bandwidth, it is possible to further improve the recording density of digital magnetic records and the reliability of reading.On the basis of theoretical analysis, the actual coding scheme of this kind of high-quality RLLC is also given (coding rules And encoder / decoder block diagram).