Radio transmission system
First Claim
1. A radio transmission system having a master station and a plurality of series connected substations connected to the master station via a radio channel, comprising:
- first receiving means, provided in each of the substations, for receiving a plurality of modulated waves modulated by means of spread spectrum and sent in a first transmission direction;
demodulating means, provided in each of the substations, for demodulating a modulated wave destined therefor by means of spread spectrum from among said plurality of modulated waves received by said first receiving means;
first transmitting means, provided in each of the substations, for transmitting said plurality of modulated waves received by said first receiving means in the first transmission direction to an adjacent one of the substations,second receiving means, provided in each of the substations, for receiving a plurality of modulated waves modulated by means of spread spectrum and sent in a second transmission direction exactly opposite to the first transmission direction;
modulating means, provided in each of the substations, for modulating a baseband signal to be sent therefrom by means of spread spectrum; and
second transmitting means, provided in each of the substations, for transmitting, together with said plurality of modulated waves received by said second receiving means, a modulated wave obtained by said modulating means in the second transmission direction to an adjacent one of the substations or the master station.
1 Assignment
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Accused Products
Abstract
A radio transmission system is provided which includes a master station and a plurality of series connected substations connected to the master station via a radio channel. First receiving unit receives a plurality of modulated waves which have been modulated by means of spread spectrum. Accordingly, demodulating unit may only have a capability to process a baseband signal destined therefor, in order to demodulate the modulated wave destined therefor from among the modulated waves. On the other hand, the modulated waves received by the first receiving unit are transmitted by first transmitting unit in a first transmission direction to an adjacent substation, and thus are relayed as they are without being demodulated or modulated in the middle.
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Citations
11 Claims
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1. A radio transmission system having a master station and a plurality of series connected substations connected to the master station via a radio channel, comprising:
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first receiving means, provided in each of the substations, for receiving a plurality of modulated waves modulated by means of spread spectrum and sent in a first transmission direction; demodulating means, provided in each of the substations, for demodulating a modulated wave destined therefor by means of spread spectrum from among said plurality of modulated waves received by said first receiving means; first transmitting means, provided in each of the substations, for transmitting said plurality of modulated waves received by said first receiving means in the first transmission direction to an adjacent one of the substations, second receiving means, provided in each of the substations, for receiving a plurality of modulated waves modulated by means of spread spectrum and sent in a second transmission direction exactly opposite to the first transmission direction; modulating means, provided in each of the substations, for modulating a baseband signal to be sent therefrom by means of spread spectrum; and second transmitting means, provided in each of the substations, for transmitting, together with said plurality of modulated waves received by said second receiving means, a modulated wave obtained by said modulating means in the second transmission direction to an adjacent one of the substations or the master station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification