M.Sc Thesis


M.Sc StudentSigron Ben-Yishay Neta
SubjectLow Complexity Multi-Symbol Decision-Directed Carrier Phase
Estimation with Intradyne Frequency Offset
Cancellation
DepartmentDepartment of Electrical and Computer Engineering
Supervisor PROFESSOR EMERITUS Moshe Nazarathy


Abstract

The topic of this thesis is carrier recovery (CR) algorithms for digital signal processing (DSP) for synchronizing the receiver - mitigating phase noise and frequency offset, while providing improved overall performance.

There are various methods for synchronization of the optical receiver - carrier recovery, i.e. locking the receiver optical local oscillator laser phase and frequency onto the received optically modulated signal, but those have limitations and typically require high-quality lasers. Carrier recovery is a critical component in coherent optical receivers for 100G transmission and beyond.

This thesis proposes a new carrier recovery algorithm for digital signal processing for synchronizing the receiver - mitigating phase noise and frequency offset, while providing improved overall performance. The unique carrier recovery method disclosed here is based on Multi-Symbol-Differential-Detection (MSDD).

Our novel CR system lacks dedicated FOE hardware, and therefore has low complexity, yet it is totally immune to arbitrarily large frequency offset.