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We investigate the performance of a novel blind symbol synchronisation technique using a 30.65Gb/s real-time 16-QAM OFDM transmitter with direct detection. The proposed scheme exhibits low complexity and does not have any bandwidth overhead.
Prevailing VLSI trends point to a growing gap between the scaling of on-chip processing throughput and off-chip memory bandwidth. An efficient use of memory bandwidth must become a first-class design consideration in order to fully utilize the processing capability of highly concurrent processing platforms like FPGAs. In this paper, we present key aspects of this challenge in developing FPGA-based...
Optical OFDM communication systems operating at data rates in the 40Gb/s (and higher) range require high-throughput/highly parallel fast Fourier transform (FFT) implementations. These consume a significant amount of chip resources; we aim to reduce costs by improving the system's accuracy per chip-area. For OFDM signals, we characterize the growth of data within the FFT and explore several cost-conscious...
We have investigated real-time DSP algorithms implementing electronic predistortion and optical OFDM. These studies have been carried out through experiments with FPGA-based transmitters, and the design and post-synthesis simulations of transceiver ASICs.
In this paper, we examine several algorithms suitable for the hardware implementation of the discrete Fourier transform (DFT) with non-power-of two problem size. We incorporate these algorithms into Spiral, a tool capable of automatically generating corresponding hardware implementations. We discuss how each algorithm can be used to generate different types of hardware structures, and we demonstrate...
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