Patent ID: 6434361
Filing Date: 2002-08-13
Classification: H04B,H04L

Abstract:
A synchronization burst processor for use in a processing satellite in a satellite based communications system, said synchronization burst processor comprising:a sync burst memory operable to store at least one sync burst transmitted from at least one terrestrial terminal to the processing satellite, said sync burst formed from a quadrature pair sample set {p, q}; a first double correlator operable to perform an early correlation and a late correlation of said p samples relative to a sync burst slot to generate an early correlation Pe and a late correlation Pl; a second double correlator operable to perform an early correlation and a late correlation of said q samples relative to said sync burst slot to generate an early correlation Qe and a late correlation Ql; and a modulus module operable to determine an early modulus Re and a late modulus Rl from said early correlations Pe and Qe and from said late correlations Pl and Ql, wherein said early modulus Re and said late modulus Rl are used to determine if said sync burst is present in said sync burst slot and if said sync burst is early or late relative to said sync burst slot.