Optimized decision feedback equalization versus optimized orthogonal frequency division multiplexing for high-speed data transmission over the local cable network

The ideal near-end crosstalk and thermal noise-limited throughput capabilities of uncoded decision feedback equalized (DFE) and orthogonally frequency division multiplexed (OFDM) PAM digital signals transmitted over nonloaded twisted metallic pairs bundled in a multicore transmission cable are determined. Though OFDM has recently loomed as a possible strong competitor among alternatives to DFE for high-speed data transmission over the digital subscriber loop network, it is revealed to be, at best, of marginal value, even if one allows an infinite number of transmission subchannels.