![]() The degree distribution is at the heart of the encoding process in LT codes. The decoding complexity is further reduced to a constant per information bit. Raptor codes can recover k symbols from any k(1 + ε) encoded symbols for a small real ε > 0 with high probability. Raptor codes were later introduced as a concatenation of an LT code with a high-rate outer code such as a low-density parity-check code. In LT codes, both encoding and decoding complexities are logarithmic in k. On average with O(ln( k/ δ)) symbol operations, LT codes can recover k symbols from any encoding symbols with a probability of (1 − δ). They are universal in the sense that they achieve the capacity for any erasure channel condition. Luby-transform (LT) codes are the first realisation of the ‘digital Fountain paradigm’. In addition, rateless codes enhance the performance of the transmitter in broadcasting scenarios when each channel has different characteristics or when the channel itself is varying within small periods of time. For instance, they overcome the long acknowledgment delay when the transmitter is far from the receiver. Rateless codes are proposed to solve several shortcomings of automatic repeat request protocol. They are asymptotically optimal erasure correcting codes with highly efficient encoding and decoding algorithms. The concept of Fountain coding was first introduced in. IET Generation, Transmission & Distributionĭigital Fountain codes are a class of rateless codes which provide an efficient way to transfer information over erasure channels such as the Internet.IET Electrical Systems in Transportation.IET Cyber-Physical Systems: Theory & Applications.IET Collaborative Intelligent Manufacturing.CAAI Transactions on Intelligence Technology.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |