Transmission method and transmission apparatus
A transmission apparatus includes processing circuitry that generates a first data sequence representing first data or a second data sequence representing second data different from the first data and selects the first data sequence as an output data sequence. A modulation scheme is determined from a plurality of modulation schemes, and the output data sequence is modulated with the determined modulation scheme. Transmission circuitry transmits the modulated output data sequence. A first time interval associated with selecting the first data sequence for the output data sequence is longer than a second time interval associated with determining the determined modulation scheme.
1. A transmission apparatus comprising:
processing circuitry to:
generate a first data sequence representing first data or a second data sequence representing second data different from the first data;
select the first data sequence as an output data sequence;
determine a modulation scheme from a plurality of modulation schemes; and
modulate the output data sequence with the determined modulation scheme, and
transmission circuitry to transmit the modulated output data sequence,
wherein a first time interval associated with selecting the first data sequence for the output data sequence is longer than a second time interval associated with determining the determined modulation scheme.
2. The transmission apparatus in claim 1 , wherein the processing circuitry is configured to select the first data sequence or the second data sequence as the output data sequence depending on one or more radio communication conditions.
3. The transmission apparatus in claim 1 , further comprising a plurality of antennas coupled to the transmission circuitry,
wherein the transmission circuitry is configured to transmit, using a first transmission scheme and the plurality of antennas, a modulated output data sequence including the first data sequence, and
wherein the transmission circuitry is configured to transmit, using a second different transmission scheme and the plurality of antennas, a modulated output data sequence including the second data sequence.
4. The transmission apparatus in claim 3 , wherein the transmission circuitry is configured to:
transmit an output data sequence having the same data from the plurality of antennas using the first transmission scheme, and
transmit an output data sequence having different data from the plurality of antennas using the second transmission scheme.
5. The transmission apparatus in claim 3 , wherein the first transmission scheme is based on space-time block coding (STBC).
6. The transmission apparatus in claim 3 , wherein:
the plurality of modulation schemes includes a first modulation scheme and a second modulation scheme different from the first modulation scheme, and
the processing circuitry is configured to:
modulate an output data sequence including the first data sequence using the first modulation scheme, and
modulate an output data sequence including the second data sequence using the second modulation scheme.
7. The transmission apparatus in claim 6 , wherein the first modulation scheme and the second modulation scheme have a same maximum M-ary modulation index value.
8. The transmission apparatus in claim 3 , wherein the second transmission scheme has higher data rate than the first transmission scheme.
9. The transmission apparatus in claim 3 , wherein the first transmission scheme has higher error resistance than the second transmission scheme.
10. A method for a transmission apparatus comprising the steps of:
generating a first data sequence representing first data or a second data sequence representing second data different from the first data;
selecting the first data sequence as an output data sequence;
determining a modulation scheme from a plurality of modulation schemes;
modulating the output data sequence using the determined modulation scheme; and
transmitting, by transmission circuitry, the modulated output data sequence,
wherein a first time interval associated with selecting the first data sequence for the output data sequence is longer than a second time interval associated with determining the determined modulation scheme.
11. The method in claim 10 , further comprising selecting the first data sequence or the second data sequence as the output data sequence depending on one or more radio communication conditions.
12. The method in claim 10 , further comprising:
transmitting, using a first transmission scheme and a plurality of antennas, a modulated output data sequence including the first data sequence, and
transmitting, using a second transmission scheme and the plurality of antennas, a modulated output data sequence including the second data sequence.
13. The method in claim 12 , further comprising:
transmitting an output data sequence having the same data from the plurality of antennas using the first transmission scheme, and
transmitting an output data sequence having different data from the plurality of antennas using the second transmission scheme.
14. The method in claim 12 , wherein the first transmission scheme is based on space-time block coding (STBC).
15. The method in claim 12 , wherein the plurality of modulation schemes includes a first modulation scheme and a second modulation scheme different from the first modulation scheme, the method further comprising:
modulating an output data sequence including the first data sequence using the first modulation scheme, and
modulating an output data sequence including the second data sequence using the second modulation scheme.
16. The method in claim 15 , wherein the first modulation scheme and the second modulation scheme have a same maximum M-ary modulation index value.
17. The method in claim 12 , wherein the second transmission scheme has higher data rate than the first transmission scheme.
18. The method in claim 12 , wherein the first transmission scheme has higher error resistance than the second transmission scheme.