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A real-time optical Nyquist pulse transmitter generates 150 Gbit/s PDM-64QAM data with 12 bit/s/Hz spectral efficiency. A 64-tap FIR pulse shaper improves the BER by adjusting the DSP accuracy dynamically from 6 to 11 bit.
We demonstrate for the first time a 101.5 Gbit/s single-polarization OFDM transmitter based on real-time FPGA processing. We modulate 58 subcarriers with 16QAM.
According to the shrinking feature size of the VLSI circuits it is expected that nano scale devices and interconnections will introduce unprecedented level of defects and architectural designs need to settle with the uncertainty result at such scales. Several approaches for implementing the fault tolerance systems are already investigated. Most of these methods are applicable also in the case of high...
We are developing a three-dimensional ultrasound computer tomography (3D USCT) system for early breast cancer diagnosis. The interaction of unfocused ultrasonic waves with the female breast is recorded as pressure variation over time from many different angles and afterwards computationally focused in 3D. For data acquisition (DAQ) a massively parallel, FPGA-based system has been developed. The measurement...
We demonstrate a software-defined real-time optical multiformat transmitter. Here, eight different modulation formats are shown. Data rate and modulation formats are defined through software accessible look-up tables enabling format switching in the nanosecond regime without changing the transmitter hardware. No data are lost during the switching process. SP-64 quadrature amplitude modulation at 28...
Xilinx Virtex FPGAs offer the possibility of dynamic and partial run-time reconfiguration. If a system uses this feature the designer has to take care, that no signal lines cross the border to other reconfigurable regions. Traditional solutions connecting modules on a dynamic and partial reconfigurable system use TBUF elements for connection and separation of the functional blocks. While automatically...
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