Originally featured on BroadcastEngineering.com
DMT unveils digital adaptive pre-correction for B10 exciter
DMT has introduced digital adaptive pre-correction for its B10 exciter to compensate for the intrinsic linearity distortion of transmission systems, thus providing linear system response.
As an alternative to external loading of pre-correction curves, the digital adaptive pre-correction allows for a direct identification of the system transfer function by processing the results of a comparison between input and output. On this basis, the system computes offline the optimum pre-correction curve and applies it to the system. Computation of a new pre-correction curve can be requested through a control unit and can help in case there is a change in system response.
The introduction of digital adaptive pre-correction on the multimode B10 exciter, which is available in a configuration that features digital processing of analog modulation, makes the signal processing tool available for digital transmission — in both DVB-T (COFDM) and ATSC-DTV (8VSB) standards.
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