Energy-Efficient Chromatic Dispersion Compensation for Coherent Fiber-Optic Receivers
Ladda ner
Typ
Examensarbete för masterexamen
Master Thesis
Master Thesis
Program
Embedded electronic system design (MPEES), MSc
Publicerad
2014
Författare
Fougstedt, Christoffer
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
DSP-based chromatic dispersion compensation accounts for a large part of the overall power dissipation in fiber-optic receiver ASICs. We have implemented and evaluated compensation filters based different design methods using a MATLAB-based coherent fiber-optic system model in respect to compensation performance, filter length, and fixed-point aspects. Possible power savings when taking into account that the pulse-shaped, over-sampled signal is band-limited when designing the filters were investigated. Different complex FIR filter topologies, including configurable filters, have been implemented and evaluated in terms of power dissipation. MCMbased and fast-FIR-based approaches were found to significantly reduce power consumption in comparison to a transposed FIR filter. The half-band filter allows for a significant reduction in power consumption, given that the signal is band-limited to [-=2{=2]. Implementing reconfigurability was found to incur an additional power dissipation of 50%.
Beskrivning
Ämne/nyckelord
Data- och informationsvetenskap , Computer and Information Science