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In 5G wireless systems, centralized RAN (C-RAN) is an architectural choice where the signal waveforms received by Remote Radio Heads (RRH) are transparently forwarded to base band units (BBU), in many cases using an optical fronthaul. Although C-RAN highly simplifies the RRH, which is positive from the operational cost standpoint, much of the system complexity and cost is shifted towards the optical...
Future flexible transceivers will be able to adapt their transmission parameters according to the channel and traffic conditions. Many recent publications propose to adapt modulation format and transmission rate, but very few address variable-rate FEC. Variable-code-rate transceivers provide an efficient trade-off between transmission rate and reach, enabling advanced networking features such as soft...
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