Patent ID: 7133397

Claim:
In a Time Division Duplex (TDD) system, an apparatus for temporally aligning Access Points (APEs) and Customer Premises Equipment (CPE) in the system, said apparatus comprising: a Global Positioning System (GPS) receiver for receiving GPS timing signals; an APE local oscillator for floting within tolerances without being precisely locked onto the GPS signal; a timing generator having a dead time counter, said timing generator coupled to said local oscillator and for generating a system burst timing signal; a phase error detector for comparing said GPS timing signals with a symbol clock signal derived from said system burst timing signal; and a synchronization state machine coupled to said phase error detector for generating synchronization information in response to the output of said phase error detector, said synchronization information, including add/subtract n time unit signals, and applied to said dead time counter to just the system burst timing signal of said time generator.