The present invention provides a diversity receiving device with superior interference
resistance in a simple construction, comprising a plurality of antennas (11,
12); an antenna switching device (13) that selects any one of a plurality
of antennas (11, 12) and carries out connection switching thereof; a demodulator
(14) that demodulates a wireless signal and obtains a baseband spread spectrum
signal; an A/D converter (15) that A/D converts the baseband spread spectrum
signal and generates chip data; a digital matched filter (16) that finds
the correlation value of the chip data and the spreading code; a maximum correlation
value detection portion (18) that detects the maximum correlation value;
an average value calculation portion (21) that finds the average value per
frame of the maximum correlation value; and a level comparison device (22)
that compares the above-mentioned average value and a predetermined threshold value,
and outputs a control signal to the antenna switching device (13) to control
antenna switching in the antenna switching device (13).
