Patent ID: 6452948
Filing Date: 2002-09-17
Classification: H04B,H04L,H04W

Abstract:
A method for synchronization of a time division multiple access digital communications system incorporating a base station and a subscriber unit, wherein a communication from said base station to said subscriber unit is effected via a forward channel signal, a communication from said subscriber unit to said base station is effected via a reverse channel signal, and said method comprises the steps of:generating, within said subscriber unit, a subscriber unit baud clock exhibiting a subscriber unit baud clock phase; configuring a transmitter of said subscriber unit to receive said subscriber unit baud clock and to include an interpolator responsive to said subscriber unit baud clock; generating, within said base station, a base station baud clock exhibiting a base station baud clock phase, wherein said subscriber unit baud clock and said base station baud clock are substantially equal in frequency; producing, within said base station, a phase-error signal in response to a phase difference between said subscriber unit baud clock and said base station baud clock; adjusting, via said interpolator, said subscriber unit baud clock phase in response to said phase-error signal; and broadcasting, via said transmitter of said subscriber unit, said reverse channel signal having said subscriber unit baud clock phase as a component thereof.