full-rank error correction coder using weighted non-binary repeat accumulate and space-time coding

摘要

An apparatus and method for weighted non-binary Repeat Accumulate RA coding and space-time coding are disclosed. Transmission data is divided in the units of frames each having mN bits, and each frame is further segmented into N blocks, each block containing m bits. The N blocks are converted to N non-binary GF(2SPm/SP) elements. These N non-binary symbols are repeated, using a repeater 202, by a repetition factor r. The rN symbols are multiplied by weighting factors, using a weighter 204, being GF(2SPm/SP) elements other than zero. The rN weighted symbols are interleaved, using an interleaver 206, and accumulated by an accumulator 212. The rN accumulated symbols are transmitted to a receiver, or each of the rN accumulated symbols is demapped to m bits prior to transmission. Therefore, information can be transmitted reliably in a wireless communication system. The method achieves unity data rate and maximum antenna diversity by providing a full-rank error correction coder using weighted non-binary codes. Randomised weighting factors may be used in order to achieve full-rank in the parity check code (matrix).