Method and device for a full-duplex radio transmission system with code divisionmultiple access

摘要

The invention relates to a synchronization method and device for a full-duplex radio transmission system with code division multiple access and TDD, comprising a central radio base station and a plurality of independent subscriber stations. According to the invention, a matched filter having an amplitude threshold switch positioned downstream is assigned to each individual subscriber station on the reception side. The method consists of the following steps: a) a maximum or Gold sequence specific to each radio transmission system is generated by a radio base station; b) the maximum or Gold sequence generated is sent to all subscriber stations as a preamble (1) before the actual user data transmission (2); c) the preamble (1) is received by the subscriber stations; d) the received preamble (1) is transmitted to the input of the corresponding matched filter; e) the output signal of the matched filter is transferred to the amplitude threshold switch; and f) a trigger signal is generated by the amplitude threshold switch when a defined threshold value Tr1 is exceeded.