| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technology of frequency hopping communication in which a plurality of signals having a bandwidth of 528 MHz of super-wideband can be switched at high speed, and the central frequency of band and the number of bands can be set/switched arbitrarily. <P>SOLUTION: A wireless transmitter/receiver 100 has a frequency hopping communication function of UWB system for switching a super-wideband signal at high speed, and performs frequency hopping at high speed by switching the frequency of a DDS 30 together with control of an SSB mixer 31 in a local oscillation circuit 1. The wireless transmitter/receiver switches the four-phase orthogonal signal 40 of output by setting NCO data (150) in the DDS 30, and switches signal input of the input terminal 70 of the SSB mixer 31 through control of a phase change-over switch 34. Any one of the sum component or the difference component obtained by mixing first and second four-phase orthogonal signals is outputted from the output terminal of the SSB mixer 31. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
