Switching signal abstraction apparatus and method for repeater in wireless broadband access network, repeater donor system using it

1. the art that the invention defined in the claims The present invention will on the switching synchronizing signal extraction device and a repeater system using the same donor for mobile Internet repeater. 2. The invention attempts to solve the technical challenges The present invention aims to provide a transmission (Tx), reception (Rx) switching synchronizing signal extracting apparatus, and the repeater donor system using the same for transmitting and receiving a signal having a constant period to apply a repeater to the portable Internet system of the TDD scheme, has exist. 3. Resolution of the subject matter of the invention, The present invention according, to detect the level of an intermediate frequency (IF) signal input from an external radio frequency (RF) power detector for outputting a DC voltage to the switching synchronizing signal extracting apparatus for a mobile Internet repeater; Comparison means for comparing said direct current voltage with a reference voltage to output the inflow if the IF signal to a pulse signal; In accordance with the pulse signal, pulse generating means for generating a frame pulse for the synchronous frame reconstruction; On the basis of the frame pulse, counting means for generating a counter value; And using the count value comprises a sync extraction means for generating a TDD (Time division duplex) frame sync signal. 4. An important use of the invention, The invention yiyongdoem like TDD repeater for mobile Internet. The portable Internet, TDD, OFDM, optical repeater, and switching the synchronization signal, a frame synchronization signal,