Positioning signal transmission apparatus
AssigneeFujitsu Limited
InventorHiroki Akano
Life of this patent
Estimating the term…
Abstract
A reception high-frequency unit receives a GPS signal transmitted from a satellite configuring GPS. A signal generation unit generates a plurality of pseudo random noise codes that are used for the positioning operation by a positioning apparatus for implementing a positioning operation based on the GPS signal and that are in the same form as that of the GPS signal. A transmission high-frequency unit generates and transmits based on the pseudo random noise codes, a positioning signal in the same form as that of the GPS signal. A transmission control unit controls the transmission high-frequency unit in such a way that a time difference based on the GPS signal received by the reception high-frequency unit is assigned to each positioning signal and the thus-assigned positioning signal is transmitted.
Claims23
An apparatus for transmitting a positioning signal, comprising:
- a reception unit for receiving a GPS signal transmitted from a satellite configuring a global positioning system (GPS);
- a signal generation unit for generating a plurality of positioning signals that are used for the positioning operation by a positioning apparatus for implementing a positioning operation based on the GPS signal and that are in a same form as that of the GPS signal;
- a transmission unit for transmitting the positioning signals;
- and
- a transmission control unit for controlling the transmission unit in such a way that assigns a time difference based on the GPS signal received by the reception unit to each positioning signal and transmits the assigned positioning signals.
A method of transmitting a positioning signal, comprising:
- generating a plurality of positioning signals that are used for a positioning operation by a positioning apparatus for implementing a positioning operation based on a GPS signal transmitted from a satellite configuring a global positioning system (GPS) and that are in a same form as a form of the GPS signal;
- and
- assigning a time difference based on the received GPS signal to each positioning signal, thereby transmitting the assigned positioning signals.
The positioning apparatus used in a positioning system including a positioning apparatus for implementing a positioning operation based on a GPS signal transmitted from a satellite configuring a global positioning system (GPS) and a positioning signal transmission apparatus for transmitting a positioning signal that is used for the positioning operation by the positioning apparatus and that is in a same form as a form of the GPS signal, wherein
- the positioning signal transmission apparatus comprises:
- a reception unit for receiving the GPS signal;
- plurality of the positioning signals;
- a transmission unit for transmitting the generated positioning signals by the signal generation unit;
- and
- a transmission control unit controlling the transmission unit in such a way that assigns a time difference based on a GPS signal received by the reception unit to each positioning signal and transmits the assigned positioning signals,
- the transmission unit transmits the positioning signal including a navigation message shown in the GPS signal received by the reception unit, and
- the positioning apparatus comprises:
- a signal reception unit for receiving a signal used for the positioning operation;
- a determination unit for determining, based on the navigation message included in the signal, whether or not a signal received by the signal reception unit is transmitted by the positioning signal transmission apparatus;
- and
- a notification unit for notifying the determination results.
An apparatus for transmitting a positioning signal, comprising:
- reception means for receiving a GPS signal transmitted from a satellite configuring a global positioning system (GPS);
- signal generation means for generating a plurality of positioning signals that are used for the positioning operation by a positioning apparatus for implementing a positioning operation based on the GPS signal and that are in a same form as that of the GPS signal;
- transmission means for transmitting the positioning signals;
- and
- transmission control means for controlling the transmission means in such a way that assigns a time difference based on the GPS signal received by the reception means to each positioning signal and transmits the assigned positioning signals.
The positioning apparatus used in a positioning system including a positioning apparatus for implementing a positioning operation based on a GPS signal transmitted from a satellite configuring a global positioning system (GPS) and a positioning signal transmission apparatus for transmitting a positioning signal that is used for the positioning operation by the positioning apparatus and that is in a same form as a form of the GPS signal, wherein
- the positioning signal transmission apparatus comprises:
- reception means for receiving the GPS signal;
- signal generation means for generating a plurality of positioning signals;
- transmission means for transmitting the generated positioning signals by the signal generation means;
- and
- transmission control means for controlling the transmission means in such a way that assigns a time difference based on a GPS signal received by the reception means to each positioning signal and transmits the assigned positioning signals,
- the transmission means transmits the positioning signal including a navigation message shown in the GPS signal received by the reception means, and
- the positioning apparatus comprises:
- signal reception means for receiving a signal used for the positioning operation;
- determination means for determining, based on the navigation message included in the signal, whether or not a signal received by the signal reception means is transmitted by the positioning signal transmission apparatus;
- and
- notification means for notifying the determination results.
An apparatus for transmitting a positioning signal, wherein the apparatus includes a code/signal processor to process code and signals, the code/signal processor comprising:
- a signal generator to generate a plurality of positioning signals used to implement a positioning operation based on a received global positioning system (GPS) signal transmitted from a GPS satellite and, wherein the positioning signals are in a same form as a form of the GPS signal;
- and
- an assignment generator to assign a time difference based on the received GPS signal to each positioning signal to provide assigned positioning signals.
Dependencies are inferred from the claim text.