Transmitting apparatus, receiving apparatus, and communication system for formatting data
View Patent ↗A transmitting apparatus, a receiving apparatus, and a communication system are provided that allow a reduction in a frame loss due to interference caused by use of the same channel. A transmitting apparatus disposed in a base station includes a GPS receiver for receiving a GPS signal, a timing generator for controlling respective function blocks in accordance with the GPS signal and an inter-base-station control signal so as to precisely synchronize the timing of frame transmission among base stations, the front-end transmission processing unit including for converting transmission information into transmission time slots, a frame generator for generating a frame including a plurality of time slots and one frame guard, and a back-end transmission processing unit for transmitting the generated frame as a radio signal.
1. A transmitting apparatus, in an orthogonal frequency division multiplexing wireless communication system, comprising:
a front-end transmission processing unit for converting a transmission signal into a transmission time slot;
a frame generator for generating a frame that includes a series of n (greater than 1) time slots and a frame guard period added to the series of n time slots, each time slot including an effective symbol period and guard period added to the effective symbol period, where the length of the series of n time slots is less than the length of the frame; and
a back-end transmission processing unit for transmitting the generated frame as a radio signal.
2. A transmitting apparatus according to claim 1 , wherein the front-end transmission processing unit includes a modulator for modulating transmission information by means of a proper modulation scheme selected on the basis of electric field strength information received from a communication terminal to which the transmission information is transmitted.
3. A transmitting apparatus according to claim 1 , wherein the frame guard period is a non-signal period.
4. A transmitting apparatus according to claim 1 , wherein the front-end transmission processing unit generates a time slot by adding a predetermined guard period to an effective symbol period.
5. A transmitting apparatus, in an orthogonal frequency division multiplexing wireless communication system, comprising:
a front-end transmission processing unit for converting transmission signal into a transmission time slot;
a frame generator for generating a frame that includes a series of n (greater than 1) time slots and a frame guard period added to the series of n time slots, each time slot including an effective symbol period and guard period added to the effective symbol period, where the frame guard period is a non-signal period, and the length of the series of n time slots is less than the length of the frame; and
a back-end transmission processing unit for transmitting the generated frame as a radio signal.
6. A transmitting apparatus according to claim 5 , further comprising a timing generator for generating a timing signal on the basis of a GPS signal and an inter-base-station control signal for achieving synchronization among base stations, thereby precisely synchronizing the timing of frame transmission among the base stations.
7. A transmitting apparatus according to claim 6 , wherein the front-end transmission processing unit includes a modulator for modulating transmission information by means of a proper modulation scheme selected on the basis of electric field strength information received from a communication terminal to which the transmission information is transmitted.
8. A transmitting apparatus according to claim 6 , wherein the front-end transmission processing unit generates a time slot by adding a predetermined guard period to an effective symbol period.
9. A transmitting apparatus according to claim 5 , wherein the front-end transmission processing unit includes a modulator for modulating transmission information by means of a proper modulation scheme selected on the basis of electric field strength information received from a communication terminal to which the transmission information is transmitted.
10. A transmitting apparatus according to claim 5 , wherein the front-end transmission processing unit generates a time slot by adding a predetermined guard period to an effective symbol period.
11. A transmitting apparatus disposed in at least one of a plurality of base stations each of which has a capability of communicating, using a signal according to a predetermined modulation scheme, with a communication terminal being within an area assigned to the base station, the transmitting apparatus comprising:
a front-end transmission processing unit for converting transmission signal into a transmission time slot;
a frame generator for generating a frame including a series of n (greater than 1) time slots and a frame guard period added to the series of n time slots, wherein the frame guard period is a non-signal period;
a back-end transmission processing unit for transmitting the generated frame as a radio signal; and
a timing generator for generating a timing signal on the basis of a GPS signal and an inter-base-station control signal for achieving synchronization among base stations, thereby precisely synchronizing the timing of frame transmission among the base stations.