Method of compensating phase noise at the receiver end of a data transmission system

摘要: Data in the form of multi-value symbols is transmitted at a symbol rate 1/ΔT. At receiver decision circuit supplies estimates on basis received symbols. The present invention concerns compensating phase noise after equalization, if any, and before application to (38, 39). are complex with in-phase quadrature components yk ' " respectively. Phase compensated by multiplication multiplier (36) coefficient mk mk+1 =[mk -λ(vk -ak)yk *]exp[-iFk (ej)] where: λ real coefficient; * conjugate instant kΔT+to (where taken as origin time measurements); vk applied said instant; ak estimated value symbol; ej an error signal derived from difference between jΔT+to ; Fk (ej) linear function least signals ej. particularly applicable modulation systems, but only one channel can be simulated using Hilbert transform channel.