Transmitter, receiver, and data communications system and method
AssigneeFujitsu Component Limited
InventorsTakuya Uchiyama, Shigemi Kurashima
Life of this patent
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Abstract
There is provided a transmitter that transmits data in a spread spectrum communications system including a spread modulation portion spreading transmitting data with a spread code, an RZ conversion portion converting the transmitting data spread to an RZ signal, and an impulse sequence conversion portion multiplying the RZ signal by an impulse sequence to convert the RZ signal to an impulse radio signal.
Claims17
A transmitter that transmits data in a spread spectrum communications system comprising:
- a spread modulation portion spreading transmitting data with a spread code;
- an RZ conversion portion converting the transmitting data spread to an RZ signal;
- and
- an impulse sequence conversion portion multiplying the RZ signal by an impulse sequence to convert the RZ signal to an impulse radio signal.
A receiver that receives an impulse radio signal in which an RZ signal is multiplied by an impulse sequence code comprising:
- a receiving portion having n buffers that sequentially receive at intervals of 1/n in one cycle of the RZ signal, where n is an arbitrary natural number;
- and
- a demodulation portion that demodulates an output from the buffers to be determined valid.
A data communications system in which impulse radio signals are transmitted and received comprising:
- a transmitter;
- and
- a receiver,
- the transmitter including a spread modulation portion spreading transmitting data with a spread code, an RZ conversion portion converting the transmitting data spread to an RZ signal, and an impulse sequence conversion portion multiplying the RZ signal by an impulse sequence to convert the RZ signal to an impulse radio signal,
- the receiver including a receiving portion having n buffers that sequentially receive at intervals of 1/n in one cycle of the RZ signal, where n is an arbitrary natural number, and a demodulation portion that demodulates an output from the buffers to be determined valid.
A method for transmitting data in a spread spectrum communications system comprising:
- spreading transmitting data with a spread code;
- converting the transmitting data spread to an RZ signal;
- and
- multiplying the RZ signal by an impulse sequence to convert the RZ signal to an impulse radio signal.
A method for receiving an impulse radio signal in which an RZ signal is multiplied by an impulse sequence code comprising:
- sequentially receiving with n buffers at intervals of 1/n in one cycle of the RZ signal, where n is an arbitrary natural number;
- and
- demodulating an output from the buffers to be determined valid.
Dependencies are inferred from the claim text.