Open AccessDesign of realisable optimum post‐detection filters for high data‐rate m ‐PAM systems with clock jitter tolerance
Author(s) -
Lane P.M.
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2018.0238
Subject(s) - jitter , robustness (evolution) , computer science , pulse amplitude modulation , electronic engineering , symbol rate , real time computing , channel (broadcasting) , bit error rate , engineering , telecommunications , pulse (music) , biochemistry , chemistry , detector , gene
The continual increase in demand for extremely high data‐rate systems spans the full range of network systems from local area networks to long‐haul systems. While coherent optical systems dominate the long‐haul market, there is significant interest in using simpler direct detection systems for application areas, where simplicity and lower‐cost is a key driver. Pulse‐amplitude modulation (PAM) is appropriate to consider as it enables the reduction of the channel symbol rate for a given data rate, without unduly increasing the complexity of the system. A route to the design of optimum post‐detection filter for PAM systems is presented that offers significantly improved robustness to timing jitter, which is an impairment of increasing import as symbol rates are increased.