Patent ID: 11949476
Assignee: AJAX SYSTEMS CYPRUS HOLDINGS LTD
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A safety or control system with the method for the radio communication according to claim 1, the system comprising: a plurality of transceivers (1) and (2), each of them being configured to receive and to transmit a radio signal, wherein at least one transceiver (2) comprises a radio module (3) that is coupled to a high-frequency commutator (4) that has a set of outputs that is coupled to a plurality of antennas k1 (5); and a microcontroller (6) that is coupled to the radio module (3) and to the high-frequency commutator (4), wherein the radio module (3) is configured to operate at radio frequencies k2, and the microcontroller (6) is configured to periodically perform a cycle of searching for a preamble by:
loading the radio frequency from the set of given radio frequencies k2 to the radio module (3), linking the antenna (5) from the plurality of antennas k1 (5) through the high-frequency commutator (4) followed by searching for the preamble at the established radio frequency through the linked antenna (5),
linking another antenna (5) from the plurality of antennas k1 (5) followed by searching for the preamble at the preliminary established radio frequency through the linked antenna (5),
loading another radio frequency from the set of given radio frequencies k2 to the radio module (3) followed by searching for the preamble at the established radio frequency through the preliminary linked antenna (5),
linking another antenna (5) from the plurality of antennas k1 (5) followed by searching for the preamble at the preliminary established radio frequency through the linked antenna (5),
selecting the antenna (5) having a maximum level of the radio signal, at which the preamble has been received, and assigning the frequency, at which the preamble has been received, as a reference (carrier) frequency followed by synchronization of the transceivers through the selected antenna (5) and the reference frequency,
wherein other transceivers (1) from the plurality of the transceivers are configured to broadcast the radio signal comprising at least the preamble and a packet body, wherein a minimum duration of the preamble for the broadcasting of the radio signal is determined by a ratio T1=(k1+k2) T, where T1 is a duration of the preamble broadcasting in msec, T is a duration of linking of one antenna of the transceiver at a single radio frequency in msec.