Vanu Inc. 0PW1C0010 사용자 설명서
Vanu Anywave BSS Operator Guide — DRAFT
2.3
RF Front End
The wideband RF Front End performs transmission and reception over the air interface between the BTS
and GSM mobile stations. Using a wideband multi-channel front end allows one BTS unit to transmit
and receive multiple carriers over a bandwidth of 26 MHz.
and GSM mobile stations. Using a wideband multi-channel front end allows one BTS unit to transmit
and receive multiple carriers over a bandwidth of 26 MHz.
The RF Front End includes both the RF up/down converter and the digital RF subsystem, which
perform digital filtering, timestamp injection and other functions. The BTS software communicates with
the RF Front End using digital baseband samples sent via Radio Frequency over Ethernet.
perform digital filtering, timestamp injection and other functions. The BTS software communicates with
the RF Front End using digital baseband samples sent via Radio Frequency over Ethernet.
The Protium RF Front End Unit is divided into two compartments for noise containment. The lower
compartment contains the duplexer and associated filters. The upper compartment contains the RF
Up/Down converters, analog-to-digital converters, digital-to-analog converters, and other digital
hardware.
compartment contains the duplexer and associated filters. The upper compartment contains the RF
Up/Down converters, analog-to-digital converters, digital-to-analog converters, and other digital
hardware.
The RF signals are piped between the two compartments externally to maintain the noise separation. We
will refer to the lower compartment as the Duplexer and the upper compartment as the Up/Down
Converter for simplicity. The units will be installed and serviced as one box, but for the sake of clarity we
will describe them here as two components.
will refer to the lower compartment as the Duplexer and the upper compartment as the Up/Down
Converter for simplicity. The units will be installed and serviced as one box, but for the sake of clarity we
will describe them here as two components.
An RF Front End will provide functionality for a single frequency band, of which four are commonly used:
850 MHz, 900 MHz, 1800 MHz, or 1900 MHz. The chosen band will depend on the project requirements.
850 MHz, 900 MHz, 1800 MHz, or 1900 MHz. The chosen band will depend on the project requirements.
9