Patent ID: 8509358
Filing Date: 2013-08-13
Classification: H03M,H04L

Abstract:
1. A method comprising: modulating transmission data with a modulation scheme to form symbols; encoding the symbols with a transmission filter to form convolution-encoded transmission symbols, wherein a convolution-encoded transmission symbol contains components of several symbols arranged in time succession: transmitting the transmission symbols via a transmission channel, wherein the transmitted transmission symbols are received as reception symbols; and decoding the reception symbols by means of a modified Viterbi algorithm, wherein independently of the decoding with the modified Viterbi algorithm, additional items of information, which relate to possible consequential states of the decoding, are determined in every state of the decoding, wherein the additional items of information are used to restrict further decoding to given consequential states, wherein additional knowledge relating to possible consequential states is obtained by determining an inter-symbol, interference-free, present reception symbol, wherein the inter-symbol, interference-free, present reception symbol is obtained by subtraction weighted with weighting factors of past inter-symbol, interference-free reception symbols from the present reception symbol, wherein the given consequential states are determined through states of minimum Euclidean distance to the inter-symbol, interference-free, present reception symbol, and wherein a modulation device carries out the modulating transmission data.