Patent ID: 11901952
Assignee: MARVELL ASIA PTE LTD
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The coherent optical receiver of claim 1, wherein the error evaluation circuitry is configured to adjust the determinant according to

ρk+1(Ωm, 0)=ρk(Ωm,0)ejαΣi=0kΔ{circumflex over (n)}d(i) 

where

ρk(Ωm,0)=e−j4ΔndΩme−jNfftΩm(P(Ωm)P(−Ωm))2,

Δnd=nd−Nfft/4,
nd is a group delay at impedance Q=0,
Nfft/2 is the number of the plurality of taps, and
P(Ωm) is a real positive number related to the magnitude of the frequency response of the input signal.