Wire communication device, wire communication apparatus, wire communications method, and wire communications system
First Claim
1. A wire communications device comprising:
- a primary modulating portion performing primary modulation of transmission data to produce a primary modulated signal;
a code generating portion producing a spread spectrum code in synchronization with a synchronizing signal having a predetermined period;
a spread spectrum modulating portion performing spread spectrum modulation of said primary modulated signal using said spread spectrum code to produce a spread spectrum modulated signal; and
a communications interface portion providing a wire communications channel with both said synchronizing signal and said spread spectrum modulated signal.
1 Assignment
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Accused Products
Abstract
The wire communications device 30 comprises a primary modulating portion 32, a PN code generating portion 34, a spread spectrum modulating portion 36, and a communications interface portion 38. The primary modulating portion 32 performs primary modulation of the transmission data to produces a primary modulated signal. The PN code generating portion 34 generates a PN code in synchronization with a synchronizing signal that has a predetermined period. The spread spectrum modulating portion 36 performs spread spectrum modulation of the primary modulated signal using the PN code, thereby producing a spread spectrum modulated signal. The communications interface portion 38 sends the synchronizing signal and spread spectrum modulated signal to the wire communications channel 3. Accordingly, the receiver can produce a spread spectrum code for reverse spread spectrum demodulation with respect to the synchronizing signal received from the wire communications channel 3. As a result, a wire communications device, wire communications apparatus, wire communications method and wire communications system can be provided to increase the transmission speed of data when spread spectrum communications systems are applied to wire communications channels.
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Citations
21 Claims
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1. A wire communications device comprising:
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a primary modulating portion performing primary modulation of transmission data to produce a primary modulated signal;
a code generating portion producing a spread spectrum code in synchronization with a synchronizing signal having a predetermined period;
a spread spectrum modulating portion performing spread spectrum modulation of said primary modulated signal using said spread spectrum code to produce a spread spectrum modulated signal; and
a communications interface portion providing a wire communications channel with both said synchronizing signal and said spread spectrum modulated signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of performing wire communications between a transmitter and a receiver connected to said transmitter via a wire communications channel, said wire communications method comprising the steps of:
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performing primary modulation of transmission data to produce a primary modulated signal;
providing the wire communications channel with a synchronizing signal having a predetermined period;
performing spread spectrum modulation of said primary modulated signal using a spread spectrum code synchronized with said synchronizing signal, to produce a spread spectrum modulated signal; and
providing said wire communications channel with said spread spectrum modulated signal.
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21. A method of performing wire communications between a transmitter and a receiver connected to said transmitter via a wire communications channel, said wire communications method comprising the steps of:
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reproducing a synchronizing signal from a signal including a signal component having a predetermined period, said signal being received from said wire communications channel;
performing reverse spread spectrum demodulation of said signal using a spread spectrum code produced in synchronization with said synchronizing signal to produce a reverse spread spectrum demodulated signal; and
performing primary demodulation of said reverse spread spectrum demodulated signal to produce reception data.
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Specification