Enhancing the Bandwidth of DACs by Analog Bandwidth Interleaving

Conference: Breitbandversorgung in Deutschland - 10. ITG-Fachkonferenz
04/18/2016 - 04/19/2016 at Berlin, Deutschland

Proceedings: Breitbandversorgung in Deutschland

Pages: 8Language: englishTyp: PDF

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Authors:
Schmidt, Christian; Kottke, Christoph (Fraunhofer Heinrich Hertz Institut, Einsteinufer 37, 10587 Berlin, Germany & Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany)
Jungnickel, Volker; Freund, Ronald (Fraunhofer Heinrich Hertz Institut, Einsteinufer 37, 10587 Berlin, Germany)

Abstract:
The rising demand for high-speed data transmission systems requires the upgrade of existing fiber-optic transport networks. A key component of nowadays fiber optics links are fast digital-to-analog converters (DACs), which are mainly limited by their bandwidth. We present a novel concept called analog bandwidth interleaving to increase the bandwidth of DACs by interleaving multiple DACs in the frequency domain. A multiple-input multiple-output (MIMO) digital signal processing (DSP) algorithm is presented undoing the crosstalk between the frequency bands. Moreover, the concept is validated experimentally using two low-speed DACs.