METHOD TO ENABLE TETRA-LLKE DIRECT MODE OPERATION TO WORK ON BROADBAND NETWORK

摘要

A method of producing signals to emulate TETRA direct mode physical layer to a broadband network, particularly WiMAX network is disclosed. Frames of broadband signals are arranged as a time slot to form a direct mode multiframe, said multiframe is made up of 18 direct mode frames according to TETRA direct mode specification. Two time slots are provided for a call transaction, a first and third time slot within a direct mode frame, for every communication channel. A proper modulation is later assigned for each direct mode burst including linearization burst, synchronization burst and normal burst. The preamble of direct mode burst shall be different from the one used for WiMAX.