| 摘要 |
<p>Radio units perform frequency-conversion from radio-frequency analog signals received by antennas to baseband analog signals. The radio units detect the strength of the baseband analog signals and output it as RSSIs. A generating unit generates a single pseudo RSSI from a plurality of RSSIs. A-D units perform analog-to-digital conversion on analog received signals and then outputs digital received signals. A plurality of multipliers weight the digital received signals with receiving weight vector signals, and an adder adds up outputs of the multipliers so as to output a digital composite signal. Another multiplier carries out an automatic gain control (AGC) of the digital composite signal. In a demodulation unit, an analog composite signal is subjected to analog-to-digital conversion, the thus converted signal is subjected to an de-spread processing and the thus de-spread signal is then demodulated.</p> |
