One of the most challenging components of an optical coherent communication system are the integrated circuits (ICs) that process the received signals or condition the transmit signals. We discuss implementation aspects of these ICs and their main building blocks, as data converters, baseband signal processing, forward error correction, and interfacing. We highlight selected implementation details for some baseband signal processing blocks of a coherent receiver. The latest generation of coherent ICs also supports advanced forward error correction techniques based on soft decisions. We introduce circuits for encoding and decoding low-density parity-check (LDPC) codes and show how to evaluate different forward error correction schemes based on a set of recorded measurement data.
One of the most challenging components of an optical coherent communication system are the integrated circuits (ICs) that process the received signals or condition the transmit signals. We discuss implementation aspects of these ICs and their main building blocks, as data converters, baseband signal processing, forward error correction, and interfacing. We highlight selected implementation details for some baseband signal processing blocks of a coherent receiver. The latest generation of coherent ICs also supports advanced forward error correction techniques based on soft decisions. We introduce circuits for encoding and decoding low-density parity-check (LDPC) codes and show how to evaluate different forward error correction schemes based on a set of recorded measurement data.
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