| 摘要 |
PURPOSE:To improve diversity reception characteristics by selecting an optimum diversity branch which has large signal electric power on the basis of an inverse spreader output as a selection reference. CONSTITUTION:Inverse diffusers 13a and 13b which convert desired waves of spread spectrum received signals into narrow-band signals are provided for the outputs of two receivers 12a and 12b which are connected to antennas 11a and 11b and convert the frequency bands of the received signals from a radio frequency band to an intermediate frequency band or base band. Then the equipment is equipped with a switch 14 as a diversity receiving means which selects and demodulates one output signal that is larger in signal electric power between the output signals of the inverse spreaders 13a and 13b and a demodulator 15 which demodulates the output signal of the switch 14. Here, diversity processing is performed on the basis of the output signal, generated by inversely spreading the output of the receiver, as the selection reference, thereby selecting the optimum diversity branch or performing composite diversity processing with a maximum signal-to-noise electric power ratio. |
