טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
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 Engineering
Supervisor Professor Moshe Nazarathy
Full Thesis textFull thesis text - English Version


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.