A calculation-efficient algorithm for decision feedback equalizers

We propose an algorithm for decision feedback equalizers used in high speed digital receiver demodulators such as DTV receivers. The algorithm uses th e sparse channel characteristics of the DTV transmission. A variation of th e decision feedback equalizer, namely the partial feedback equalizer, is al so introduced. The sparseness of the channel is combined with the partial f eedback equalizer to develop a new algorithm. Similarity with subspace base d filtering is noted, which results in robust performance in the presence o f noise. The new algorithm has a superior convergence speed and lower stead y state mean squared error, as compared to conventional approaches.