| 摘要 |
PROBLEM TO BE SOLVED: To provide the low-speed frequency hopping communication system improving the degradation of the communication qualilty by a multipath fading. SOLUTION: This transmitter/receiver for mobile radio is provided with a modulation/ demodulation part 21 modulating and demodulating a data row, an antenna part 22 radiating the radio wave of the output or input signal of the modulation/demodulation part in the space or acquiring the radio wave, a channel quality monitoring part 24 monitoring the transmission quality of each channel for every slot received by the antenna part for every prescribed period, a frequency synthesizer part 23 for performing a frequency hopping and a control part 25 supplying data to the frequency synthesizer part and performing the generation of a frame signal and the controls of various kinds of data rows, etc. The control part 25 preforms training scanning for all the channels for every prescribed period by using a specified channel of plural channels, selects n channels except the channels which are below a prescribed transmission quality level, defines the n pieces selected channels as the valid channels within the period and performs the frequency hopping. |
