Communication network using synchronous code division multiplexing method
First Claim
1. A communication network comprising:
- a plurality of first communication devices, each of which comprises a first transceiver which transmits a spread modulated signal, a first receiver which receives phase control information, and a first controller which controls a phase at which the first transceiver transmits the spread modulated signal, using the phase control information;
a repeater which generates a code division multiplexed signal by superposing spread modulated signals transmitted respectively by the first communication devices; and
a second communication device comprising a second receiver which receives and demultiplexes the code division multiplexed signal, a second controller which determines an optimum phase of the spread modulated signal for each of the first communication devices using the demultiplexed signal, and a second transceiver which transmits the optimum phase to the first receiver as the phase control information.
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Abstract
In a communication network which performs transmission from a plurality of first communication devices to a single second communication device using a synchronous code division multiplexing technique, the phases of signals transmitted from the first communication devices are synchronized easily. The first communication devices control the transmission phase of spread modulated signals using phase control information received from the second communication device. A repeater generates a code division multiplexed signal by superposing the spread modulated signals transmitted respectively from the first transmission devices. The second transmission device demultiplexes the code division multiplexed signal received from the repeater, determines the optimum phase of the demultiplexed signals, and transmits the determined optimum phase to the first transmission devices as the phase control information.
15 Citations
21 Claims
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1. A communication network comprising:
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a plurality of first communication devices, each of which comprises a first transceiver which transmits a spread modulated signal, a first receiver which receives phase control information, and a first controller which controls a phase at which the first transceiver transmits the spread modulated signal, using the phase control information;
a repeater which generates a code division multiplexed signal by superposing spread modulated signals transmitted respectively by the first communication devices; and
a second communication device comprising a second receiver which receives and demultiplexes the code division multiplexed signal, a second controller which determines an optimum phase of the spread modulated signal for each of the first communication devices using the demultiplexed signal, and a second transceiver which transmits the optimum phase to the first receiver as the phase control information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification