A New Parallel Scrambling/Descrambling Method Based on the Property of Sampling Subsequence of m-Sequence
Zhiping Huang · Acta Armamentarii · 2009
In order to solve defect of the scrambling/descrambling method in the current SDH comunication,a new parallel scrambling/descrambling method was proposed.The process of parallel scrambling/descrambling is regarded as a sampling process of the m-sequence.When the sampling interval is the power of 2,generated polynome of the sampling subsequence of m-sequence is equivalent to that of the original m-sequence,which have the different initial states respectively.Based on the property,the parallel scrambler can be divided to several scramblers whose parallel word widths are much smaller,to improve operation rate.The architecture of this scrambler is simple,has no requirement on memory and can better satisfy the time sequence request of high-speed transport system.The proposed method was realized by field programmable gate array and verified in the application of front terminal of high speed optical transport system.