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Adaptive Pre-Correction

Modern transmission systems typically consist of a baseband unit, where most of the coding, modulation and digital signal processing takes place, an upconversion unit, an amplifier to adjust signal power, a filter to limit spectral emission, and a channel interface unit (antenna, coupler, etc.) which puts the signal onto the transmission medium such as air and copper wire.
Apart from the baseband unit which does not corrupt the signal significantly, the other mostly analog parts of the transmission system can impose large impairments on the transmission signal.
To minimize the impact of these distortions, different techniques can be used. In modern transmission systems these methods are almost exclusively employed in the digital domain, using digital linear and non-linear signal precorrection. The former minimizes the frequency dependent effects and the latter the amplitude dependant nonlinear distortions of transmission chain.
Beyond Devices knowledge and expertise with algorithm design and digital signal processing has resulted in the development of various algorithms to effectively minimize these effects, and to allow maximum practically achievable limits even in the most challenging circumstances. These algorithms enable automatic determination of precorrection characteristics, which can greatly reduce the manufacturing time and allow on-site adaptation to changed operation conditions. Manual adjustments are also supported.
For more information and licensing possibilities please contact us or request a training course. Our experts will gladly demonstrate to you how to effectively use these techniques to maximize your system performance.
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