Practical termination strategies for subcarrier equalizer tap loading algorithms

Abstract

In this paper, a termination strategy for subcarrier equalizer tap loading algorithms is proposed. The objective of these algorithms is to non-uniformly distribute equalizer taps incrementally across the subcarriers of a multicarrier system to reduce the overall distortion introduced by the channel. Knowing when enough equalizer taps have been allocated is the task of the algorithm's termination strategy, which employs a number of criteria in the decision process. The proposed termination strategy, which is based on limiting the total number of taps used by the system, is presented and compared with three other strategies proposed earlier. Simulation results for a system employing the proposed strategy using different total tap limits emphasize the advantages of equalizer tap loading algorithms over conventional multicarrier equalization schemes.

Algorithms for BER-Constrained Variable-Length Equalizers driven by Channel Response Knowledge over Frequency-Selective Radio Channel

“…These algorithms are derived from LMS (Least Mean Squares) algorithm incorporating controlled length. Recent studies have investigated variable linear equalizer tap loading algorithms based on frequency channel estimate for multi-carrier systems [10].…”