| 摘要 |
PURPOSE: A base station transmission device is provided to integrate a hard hand-off circuit inside an individual block, and to generate a pilot signal for hard hand-off identical to an output of the base station, so that the arrangement of a pilot unit in an additional space is not necessary. CONSTITUTION: A channel board(1) allocates channels for call data signals inputted from mobile communication terminals, and performs digital signal processing for the data. A digital signal distribution board(2) allocates and outputs the digital data signals inputted from the channel board(1) to plural paths, and controls functions of a base station transmission device on the whole. A D/A(Digital-to-Analog) conversion board(3) converts plural digital signals respectively inputted from the plural paths into analog signals and then into RF(Radio Frequency) signals. A transmission amplifier(4) performs transmission power amplification for RF signals outputted from one of the plural paths of the D/A conversion board(3) and outputs the amplified signals. And a transmission filter module(6) performs channel and band filtering for the RF data signals outputted from the transmission amplifier(4), amplifies RF pilot signals directly inputted from the D/A conversion board(3) without passing a transmission path of the transmission amplifier(4), and performs band pass filtering, then delivers the signals to an external through an antenna(5).
|
