Non-Uniform and Uniform Discrete Multitone Transceivers for the DSL and the Power Line Channels

This work is dedicated to the fond memory of my father, who taught me the true values of life and instilled in me a strong desire to learn. It is a tribute to my mother’s inspiration, my husband’s patience and perseverance and to the love and support of my dear daughters. ii Discrete Multitone (DMT) modulation is a popular multicarrier technique adopted for wireline communication, which offers computationally inexpensive channel equalization, based on cyclic prefix, in addition to bit and power loading. A cyclic prefix is pre-appended in multicarrier modulated (MCM) techniques, that helps mitigate the inter-symbol interference due to mul-tipath effect. For channel equalization, a single tap per subcarrier is sufficient to compensate for the channel distortion in the frequency domain, provided the cyclic prefix length is of the order of the channel. This formulates a Zero-Forcing frequency domain equalizer, which com-pensates the channel attenuation with an inverse channel response. However, this method has the shortcoming of enhancing channel noise, where the channel is of low magnitude, in th