Efficient Parallel Carrier Recovery for Ultrahigh Speed Coherent QAM Receivers with Application to Optical Channels

Figure 18

Surface of performance of the treated CPR algorithms under the joint effect of laser phase noise and frequency fluctuation. (a) BPS and (b) P-DPLL + BPS schemes with Δ𝑓_𝑐=35 kHz, 1/𝑇=32 Gs/s, 𝑃=64, 𝑁=21, and 𝐵=32.

(a)

(b)