H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/26 (2006.01) H04B 1/04 (2006.01) H04B 7/04 (2006.01) H04B 7/06 (2006.01)
Patent
CA 2408893
This invention includes a wireless transmitter comprising an IF-signal generator that modulates input signals into those of an intermediate frequency band, signal distributors that distribute signals from the IF-signal generator, and a plurality of signal-transmission units that convert the signals distributed by the signal distributors into those of a radio frequency band, and then transmit the converted radio signals. The invention also includes a wireless receiver that receives the radio-frequency-band modulated signals and restores the signals of the intermediate frequency band. In this way, effective diversity is realized and signal interruptions are prevented. In addition, a handy, low-cost wireless communications system is provided.
La présente invention concerne un transmetteur sans fil composé d'un générateur de signaux IF qui module les signaux d'entrée dans ceux d'une bande de fréquence intermédiaire, d'unités de distribution de signaux qui distribuent les signaux du générateur de signaux IF et d'une pluralité d'unité de transmission de signaux qui convertissent les signaux distribués par les unités de distribution de signaux en signaux d'une bande radioélectrique et qui transmettent ensuite les signaux radioélectriques convertis. L'invention porte également sur un récepteur sans fil qui reçoit les signaux modulés de la bande radioélectrique et qui restaure les signaux de la bande de fréquence intermédiaire. On obtient ainsi une diversité efficace, tout en évitant les interruptions de signaux. De plus, l'invention prévoit un système de communication sans fil pratique et peu coûteux.
Hamaguchi Kiyoshi
Ogawa Hiroyo
Shoji Yozo
Borden Ladner Gervais Llp
Communications Research Laboratory Independent Administrative Instituti Institution
National Institute Of Information And Communications Technology Indepen Dent Administrative Institution
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