Conference paper Open Access

Time-Domain Precoding for LTE-over-Copper Systems

Yezi Huang; Eduardo Medeiros; Thomas Magesacher; Stefan Host; Chenguang Lu; Per-Erik Eriksson; Per Odling; Per Ola Borjesson


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    <dct:title>Time-Domain Precoding for LTE-over-Copper Systems</dct:title>
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    <dct:description>&lt;p&gt;Crosstalk cancellation is a crucial issue for traditional digital subscriber line systems. For LTE-over-copper systems, however, the need for crosstalk cancellation varies depending on the analog fronthauling architecture and its parameters. A crosstalk handler that is decoupled as much as possible from&lt;br&gt; the rest of the system architecture is thus preferred. Therefore, we propose a time-domain precoding scheme specifically in downstream direction to separate the precoding unit from the LTE signal flow, and perform crosstalk cancellation in an ondemand manner. Estimation of all direct and crosstalk paths is assisted by LTE cell-specific reference signals. The time-domain precoder transforms the interference channel into a crosstalkfree channel with identical direct paths, which allows for lowcomplexity inter-symbol interference mitigation. We evaluate the concept in terms of signal-to-noise ratio provided for LTE signals using measured wireline channel data.&lt;/p&gt; &lt;p&gt; &lt;/p&gt;</dct:description>
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