Transmitter, receiver, wireless communication system, and communication method
First Claim
1. A transmitter that performs communication in a spread spectrum communication mode, comprising:
- a transmitter parameter setting portion that sets a parameter about the transmitter itself;
a spread code generation portion that generates a spread code based on the parameter set by the transmitter parameter setting portion; and
a transmitting portion that spreads transmit-data to form a spread signal using the spread code generated by the spread code generation portion, and that transmits the spread signal, whereinthe transmitter sets a condition for selecting a receiver with which the transmitter itself communicates and sets the parameter corresponding to the condition, andthe spread code contains a first spread code that shows a planar position of the transmitter itself and a second spread code that shows a vertical position of the transmitter itself.
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Accused Products
Abstract
A transmitter has a portion that sets a parameter about the transmitter itself based on a parameter made to correspond to a condition for selecting a receiver with which the transmitter communicate with, a portion that generates a spread code based on the set parameter, and a sending portion that spreads transmit-data to form a spread signal by the generated spread code, and that sends the spread signal. The receiver has a portion that receives the signal transmitted by the transmitter, a portion that sets a parameter about the receiver itself based on the parameter made to correspond to the condition, a portion that generates a despread code based on the set parameter, a portion that performs a correlation computation of the received signal and the generated despread code, and a portion that selects a transmitter with which the receiver communicates, based on a result of the correlation computation.
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Citations
22 Claims
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1. A transmitter that performs communication in a spread spectrum communication mode, comprising:
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a transmitter parameter setting portion that sets a parameter about the transmitter itself; a spread code generation portion that generates a spread code based on the parameter set by the transmitter parameter setting portion; and a transmitting portion that spreads transmit-data to form a spread signal using the spread code generated by the spread code generation portion, and that transmits the spread signal, wherein the transmitter sets a condition for selecting a receiver with which the transmitter itself communicates and sets the parameter corresponding to the condition, and the spread code contains a first spread code that shows a planar position of the transmitter itself and a second spread code that shows a vertical position of the transmitter itself. - View Dependent Claims (2)
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3. A transmitter that performs communication in a spread spectrum communication mode, comprising:
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a synchronization portion that synchronizes the transmitter itself and a receiver with which the transmitter itself communicates; a spread code generation portion that generates the spread code based on the position information about the transmitter itself; and a transmitting portion that spreads transmit-data to form a spread signal using the spread code generated by the spread code generation portion, and that transmits the spread signal, wherein the spread code generation portion generates the spread code synchronously with the receiver based on the position information about the transmitter itself, and the spread code contains a first spread code that shows a planar position of the transmitter itself and a second spread code that shows a vertical position of the transmitter itself.
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4. A receiver that performs communication in a spread spectrum communication mode, comprises:
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a receiving portion that receives a signal which is formed and transmitted by a transmitter, the signal being formed by setting a parameter about the transmitter itself based on a parameter that corresponds to a condition for selecting the receiver with which the transmitter communicates, generating a spread code based on the set parameter, and spreading transmit-data using the generated spread code; a receiver parameter setting portion that sets a parameter about the receiver itself based on the parameter that corresponds to the condition; a despread code generation portion that generates a despread code based on the parameter set by the receiver parameter setting portion; a correlation computation portion that performs a correlation computation of the signal received by the receiving portion and the despread code generated by the despread code generation portion; and a selection portion that sets a transmitter with which the receiver itself communicates, based on a result of the correlation computation, wherein the transmitter sets position information about the transmitter itself as the parameter of the transmitter itself, and the receiver parameter setting portion sets position information about the receiver itself as the parameter about the receiver itself, and the correlation computation portion has a position specific determination portion which compares the spread code generated by the transmitter and the despread code generated by the despread code generation portion, which detects a bit string in which values do not match between the spread code and the despread code, which creates a replica spread code from the despread code by inverting the values of the bit string detected, and which detects the position information of the transmitter based on the created replica spread code. - View Dependent Claims (5)
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6. A receiver that performs communication in a spread spectrum communication mode, comprises:
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a synchronization portion that synchronizes the receiver itself and a transmitter, which communicates with the receiver itself, which generates a spread code synchronously with the receiver based on position information about the transmitter itself, spreads transmit-data to form a spread signal using the generated spread code, and transmits the spread signal; a receiving portion that receives the signal transmitted by the transmitter; a despread code generation portion generates a despread code based on the position information about the receiver itself; a correlation computation portion that performs a correlation computation of the signal received by the receiving portion and the despread code generated by the despread code generation portion; and a selection portion that selects the transmitter that the receiver itself communicates with based on a result of the correlation computation, wherein the despread code generation portion generates the despread code synchronously with the transmitter based on the position information about the receiver itself, and the correlation computation portion has a position specific determination portion which compares the spread code generated by the transmitter and the despread code generated by the despread code generation portion, which detects a bit string in which values do not match between the spread code and the despread code, which creates a replica spread code from the despread code by inverting the values of the bit string detected, and which detects the position information of the transmitter based on the created replica spread code.
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7. A wireless communication system having a transmitter and a receiver that communicate in a spread spectrum communication mode, wherein
the transmitter has: -
a transmitter parameter setting portion that sets a parameter about the transmitter itself based on a parameter made to correspond to a condition for selecting the receiver with which the transmitter itself communicates; a spread code generation portion that generates a spread code based on the parameter set by the transmitter parameter setting portion; and a transmitting portion which spreads transmit-data to form a spread signal using the spread code generated by the spread code generation portion, and which transmits the spread signal, the receiver has; a receiving portion that receives the signal transmitted by the transmitter; a receiver parameter setting portion that sets a parameter about the receiver itself based on a parameter made to correspond to the condition; a despread code generation portion that generates a despread code based on the parameter set by the receiver parameter setting portion; a correlation computation portion that performs a correlation computation of the signal received by the receiving portion and the despread code generated by the despread code generation portion; and a selection portion that selects the transmitter to communicate with based on a result of the correlation computation, the transmitter parameter setting portion sets position information about the transmitter itself as the parameter of the transmitter itself, and the receiver parameter setting portion sets position information about the receiver itself as the parameter about the receiver itself, and the correlation computation portion has a position specific determination portion which compares the spread code generated by the transmitter and the despread code generated by the despread code generation portion, which detects a bit string in which values do not match between the spread code and the despread code, which creates a replica spread code from the despread code by inverting the values of the bit string detected, and which detects the position information of the transmitter based on the created replica spread code. - View Dependent Claims (8, 9, 10, 11)
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12. A wireless communication system that has a transmitter and a receiver that communicate in a spread spectrum communication mode, wherein
the transmitter has: -
a synchronization portion that synchronizes the transmitter itself and the receiver with which the transmitter itself communicates; a spread code generation portion that generates a spread code synchronously with the receiver based on position information about the transmitter itself; and a transmitting portion which spreads transmit-data to form a spread signal using the spread code generated by the spread code generation portion, and which transmits the spread signal, the receiver has; a synchronization portion that synchronizes the receiver itself and the transmitter with which the receiver itself communicates; a receiving portion that receives the signal transmitted by the transmitter; a despread code generation portion that generates a despread code synchronously with the transmitter based on position information about the receiver itself; a correlation computation portion that performs a correlation computation of the signal received by the receiving portion and the despread code generated by the despread code generation portion; and a selection portion that selects the transmitter to communicate with, based on a result of the correlation computation, and the correlation computation portion has a position specific determination portion which compares the spread code generated by the transmitter and the despread code generated by the despread code generation portion, which detects a bit string in which values do not match between the spread code and the despread code, which creates a replica spread code from the despread code by inverting the values of the bit string detected, and which detects the position information of the transmitter based on the created replica spread code. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A communication method in a wireless communication system that has a transmitter and a receiver that communicate in a spread spectrum communication mode, comprising:
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a transmitter parameter setting step in which the transmitter sets a parameter about the transmitter itself based on a parameter made to correspond to a condition for selecting the receiver with which the transmitter itself communicates; a spread code generation step in which the transmitter generates a spread code based on the parameter set in the transmitter parameter setting step; a transmitting step in which the transmitter spreads transmit-data to form a spread signal using the spread code generated in the spread code generation step, and transmits the spread signal; a receiving step in which the receiver receives the signal transmitted by the transmitter; a receiver parameter setting step in which the receiver sets a parameter about the receiver itself based on the parameter made to correspond to the condition; a despread code generation step in which the receiver generates a despread code based on the parameter set in the receiver parameter setting step; a correlation computation step in which the receiver performs a correlation computation of the signal received in the receiving step and the despread code generated in the despread code generation step; and a selection step in which the receiver selects the transmitter to communicate with based on a result of the correlation computation, wherein the transmitter parameter setting step includes setting position information about the transmitter itself as the parameter of the transmitter itself, and the receiver parameter setting step includes setting position information about the receiver itself as the parameter about the receiver itself, and the correlation computation step includes comparing the spread code generated by the transmitter and the despread code generated by the despread code generation portion, detecting a bit string in which values do not match between the spread code and the despread code, creating a replica spread code from the despread code by inverting the values of the bit string detected, and detecting the position information of the transmitter based on the created replica spread code.
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22. A communication method in a wireless communication system that has a transmitter and a receiver that communicate in a spread spectrum communication mode, comprising:
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a synchronization step in which the transmitter and the receiver are synchronized; a spread code generation step in which the transmitter generates a spread code synchronously with the receiver based on position information about the transmitter itself; a transmitting step in which the transmitter spreads transmit-data to form a spread signal using the spread code generated in the spread code generation step, and transmits the spread signal; a receiving step in which the receiver receives the signal transmitted by the transmitter; a despread code generation step in which the receiver generates a despread code synchronously with the transmitter based on position information about the transmitter itself; a correlation computation step in which a correlation computation of the signal received in the receiving step and the despread code generated in the despread code generation step is performed; and a selection step in which the receiver selects the transmitter to communicate with based on a result of the correlation computation, wherein the correlation computation step includes comparing the spread code generated by the transmitter and the despread code generated by the despread code generation portion, detecting a bit string in which values do not match between the spread code and the despread code, creating a replica spread code from the despread code by inverting the values of the bit string detected, and detecting the position information of the transmitter based on the created replica spread code.
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Specification