In English

Energy-Efficient Chromatic Dispersion Compensation for Coherent Fiber-Optic Receivers

Christoffer Fougstedt
Göteborg : Chalmers tekniska högskola, 2014. 30 s.
[Examensarbete på avancerad nivå]

DSP-based chromatic dispersion compensation accounts for a large part of the overall power dissipation in ber-optic receiver ASICs. We have implemented and evaluated compensation lters based di erent design methods using a MATLAB-based coherent ber-optic system model in respect to compensation performance, lter length, and xed-point aspects. Possible power savings when taking into account that the pulse-shaped, over-sampled signal is band-limited when designing the lters were investigated. Di erent complex FIR lter topologies, including con gurable lters, have been implemented and evaluated in terms of power dissipation. MCMbased and fast-FIR-based approaches were found to signi cantly reduce power consumption in comparison to a transposed FIR lter. The half-band lter allows for a signi cant reduction in power consumption, given that the signal is band-limited to [-=2{=2]. Implementing recon gurability was found to incur an additional power dissipation of 50%.

Publikationen registrerades 2014-09-16.

CPL ID: 202828

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