Patent ID: 8446931
Filing Date: 2013-05-21
Classification: H04B

Abstract:
1. A method of achieving chip timing synchronization between a primary platform and a secondary platform, wherein a primary link is transmitted from the primary platform and is received at the secondary platform, and a secondary link is transmitted from the secondary platform and is received at the primary platform, and the primary link can transition between a clear mode and a spread mode, the method comprising: spreading the secondary link at the secondary platform using a secondary spreading code at a secondary transmission phase which comprises a secondary transmission delta phase, wherein the secondary transmission delta phase comprises a secondary Doppler pre-compensation component for secondary platform movement; despreading the secondary link at the primary platform using the secondary spreading code at a secondary reception phase; tracking the secondary link using a secondary reception delta phase; when operating the primary link in a spread mode: when transitioning the primary link from the clear mode to the spread mode: