| 摘要 |
<p>Improving the reliability of digital radio communication affected by multi-path interference under an environment where there are multiple objects that scatter electromagnetic waves is accomplished. A wireless transmitter transmits a first transmission wave having a first carrier frequency (f0+Δf), modulated by a modulator with an information signal having a frequency band f1 which is predetermined, from a transmitting antenna, and transmits a second transmission wave having a second carrier frequency (f0−Δf), modulated by a modulator with such information signal. An average frequency f0 between the first carrier frequency (f0+Δf) and the second carrier frequency (f0−Δf) is kept constant, whereas the first carrier frequency (f0+Δf) and the second carrier frequency (f0−Δf) are varied by controlling a frequency differenceΔf to vary.</p> |
