Hardware-Efficient Multi-Format Frequency Offset Estimation for M-QAM Coherent Optical Receivers

In future elastic optical networks, hardware-efficient and multi-format frequency offset estimation (FOE) is critical for digital coherent receivers (DCRs) to alleviate the requirement of wavelength matching while reducing the power consumption as well as the footprint of digital signal processing units. Here, we propose a blind feedforward and low-complexity FOE algorithm based on the techniques ...