A rapid prototyping of FPGA-based duobinary transmitter/receiver for high speed electrical backplane transmission

Backplanes communication channels always have a distorting effect on the signals being passed from transmitter to receiver. Much effort research is being devoted on finding ways to reduce this distortion. This work focuses in rapid prototyping of a duobinary transmitter/receiver using a Field Programmable Gate Array. The transmitter comprises a precoder to prevent error propagation, a binary to duobinary encoder and a transmit filter. The signal is passed through a backplane channel and the channel output is equalized using a Least Mean Square filter. The system is modeled in Simulink and then the hardware description language code is generated from the model. Initial results show good eye diagram scopes which are placed at appropriate locations within the model to observe the signal at various points.