A passive antenna in the context of telecommunications is an antenna that does not require an external power source or active electronic components to function. Instead, it relies on the reception and transmission of electromagnetic waves through passive elements. Let’s explore the characteristics and functions of passive antennas. Passive Antenna in Telecommunications: 1. Basic Structure: ... Read more
The Cell Allocation (CA) is a list of all the frequencies allocated to a cell. The CA is transmitted regularly on the BCCH. Usually it is also included in the signaling messages that command the mobile to start using a frequency hopping logical channel. The cell allocation may be different for each cell. In GSM ... Read more
As shown above, CCCH=PCH+RACH+AGCH; downlink CCCH=PCH+AGCH; and uplink CCCH=RACH. In the above combinations, combination 3 and 4 must be allocated to slot 0 of the BCCH carrier configured for the cell; while combination 5 must be allocated to timeslots 2, 4 and 6 of the BCCH carrier. The FACCH works in the frame stealing mode, ... Read more