Transmitting and receiving method, and radio apparatus utilizing the same
View Patent ↗A processing unit transmits, from at least one of a plurality of antennas, data corresponding respectively to the plurality of antennas. A control unit generates request signals with which to let a second radio apparatus supply information on rates at the second radio apparatus. When transmitting the request signal, the processing unit also transmits, from a plurality of antennas which includes antennas other than the antennas that transmit the data, known signals corresponding respectively to the plurality of antennas.
1. A radio apparatus, comprising:
a generating unit configured for generating a burst signal that comprises:
(1) STS(s) (Short Training Sequence(s)) for AGC (Automatic Gain Control), operative in a MIMO system assigned to N of M streams, where N and M are integers, N is less than M, and N is equal to or greater than 1,
(2) LTSs (Long Training Sequences) for channel estimation, operative in the MIMO system assigned to the respective M streams, and
(3) data assigned to the N of M streams, each of the N of M streams including the STS, the LTS, and the data in that order in a time sequence; and
a plurality of antennas configured for transmitting the burst signal generated by the generating unit,
wherein transmitting timing of the LTS assigned to the N of M streams is different from that of another LTS which is not assigned to the N of M streams.
2. The radio apparatus according to claim 1 , wherein N is variable.
3. A radio apparatus, comprising:
a generating unit configured for generating a burst signal that comprises:
(1) STS(s) (Short Training Sequence(s)) for AGC (Automatic Gain Control), operative in a MIMO system assigned to N of M streams, where N and M are integers, N is less than M, and N is equal to or greater than 1,
(2) LTSs (Long Training Sequences) for channel estimation, operative in the MIMO system assigned to the respective M streams, and
(3) data assigned to the N of M streams, each of the N of M streams including the STS, the LTS, and the data in that order in a time sequence;
a power amplifier configured for amplifying the burst signal generated by the generating unit; and
a plurality of antennas configured for transmitting the burst signal amplified by the power amplifier,
wherein transmitting timing of the LTS assigned to the N of M streams is different from that of another LTS which is not assigned to the N of M streams.
4. The radio apparatus according to claim 3 , wherein N is variable.
5. A radio apparatus, comprising:
a generating unit configured for generating a digital burst signal that comprises:
(1) STS(s) (Short Training Sequence(s)) for AGC (Automatic Gain Control), operative in a MIMO system assigned to N of M streams, where N and M are integers, N is less than M, and N is equal to or greater than 1,
(2) LTSs (Long Training Sequences) for channel estimation, operative in the MIMO system assigned to the respective M streams, and
(3) data assigned to the N of M streams, each of the N of M streams including the STS, the LTS, and the data in that order in a time sequence;
a D-A conversion unit configured for converting the digital burst signal generated by the generating unit into an analog burst signal;
a power amplifier configured for amplifying the analog burst signal converted by the D-A conversion unit; and
a plurality of antennas configured for transmitting the analog burst signal amplified by the power amplifier,
wherein transmitting timing of the LTS assigned to the N of M streams is different from that of another LTS which is not assigned to the N of M streams.
6. The radio apparatus according to claim 5 , wherein N is variable.
7. A radio apparatus, comprising:
a generating unit configured for generating a burst signal that comprises:
(1) STS(s) (Short Training Sequence(s)) for AGC (Automatic Gain Control), operative in a MIMO system assigned to N of M streams, where N and M are integers, N is less than M, and N is equal to or greater than 1,
(2) LTSs (Long Training Sequences) for channel estimation, operative in the MIMO system assigned to the respective M streams, and
(3) data assigned to the N of M streams, each of the N of M streams including the STS, the LTS, and the data in that order in a time sequence; and
a power amplifier configured for amplifying the burst signal generated by the generating unit,
wherein transmitting timing of the LTS assigned to the N of M streams is different from that of another LTS which is not assigned to the N of M streams.
8. The radio apparatus according to claim 7 , wherein N is variable.
9. A radio apparatus, comprising:
a generating unit configured for generating a digital burst signal that comprises:
(1) STS(s) (Short Training Sequence(s)) for AGC (Automatic Gain Control), operative in a MIMO system assigned to N of M streams, where N and M are integers, N is less than M, and N is equal to or greater than 1,
(2) LTSs (Long Training Sequences) for channel estimation, operative in the MIMO system assigned to the respective M streams, and
(3) data assigned to the N of M streams, each of the N of M streams including the STS, the LTS, and the data in that order in a time sequence;
a D-A conversion unit configured for converting the digital burst signal generated by the generating unit into an analog burst signal; and
a power amplifier configured for amplifying the analog burst signal converted by the D-A conversion unit,
wherein transmitting timing of the LTS assigned to the N of M streams is different from that of another LTS which is not assigned to the N of M streams.
10. The radio apparatus according to claim 9 , wherein N is variable.