Coding Gains for Rank Decoding

摘要

It is well-known that the use of channel state information can improve decodingreliability. This is because estimates of channel noise can be used to help identify which received symbols are most likely to be in error. Any technique which uses channel noise information to improve decoding is called a soft decision decoding algorithm. Discarding channel state information in the decoding process requires an increase in the transmitter power required to achieve the same decoding error probability as when channel state information is used. The difference can be as much as 2 dB. Much contemporary research in error control coding attempts to design soft decision algorithms and to evaluate the improvement in code performance which they provide. Experimental data indicate that Chase's Rank Decoding algorithm, when used with simple parity check codes, provides values of coding gain from 2.0 to 4.0 db. Keywords: Decoding; Soft decision; Coding gain; Chase; Parity checks. (KT)