Echo Canceller for On-Channel Repeaters in T-DMB System

In this paper, a new adaptive algorithm applied to echo canceller for on-channel repeaters is proposed. At each repeater in a single frequency network (SFN) for T-DMB, there are unwanted echo signals caused by the coupling from the transmit antenna to receive antenna. Gradient adaptive lattice (GAL) can be used as an adaptive filter to cancel out those echo signals. In comparison with other adaptive algorithms, the orthogonalization properties of the GAL algorithm provide a compromise in computational complexity. This paper shows computer simulation results of rate of convergence (ROC) of mean square error (MSE) compared to other adaptive algorithms.