Space-time-state block coded MIMO communication system using reconfigurable antennas
View Patent ↗Space-Time-State Block Coded MIMO communication system using reconfigurable antennas. One or more antennas are operates in accordance with a Space-Time-State Block Code (STS-BC) to effectuate channel coding of a signal being transmitted wirelessly between communication devices. In accordance with such an STS-BC, one or more antennas (being reconfigurable in nature) of a communication device are reconfigured in different radiation states. From some perspectives, this may be viewed as performing three-dimensional channel coding, in that, in addition to achieving at least time diversity of signals being transmitted (and also potentially including spatial diversity), state diversity may be achieved by adapting one or more characteristics of one or more antennas within the communication device. Such an STS-BC may operate in an open loop configuration without requiring any feedback from another communication device to which signals are transmitted. If desired, feedback may be employed for adaptively modifying an STS-BC (or selecting another STS-BC).
1. An apparatus, comprising:
a state selection module; and
a reconfigurable antenna for transmitting:
a first symbol during a first time while configured in a first radiation state as directed by the state selection module; and
a second symbol during a second time while configured in a second radiation state as directed by the state selection module,
wherein the reconfigurable antenna also transmitting the second symbol during the first time while configured in the first radiation state as directed by the state selection module; or
the reconfigurable antenna also transmitting the first symbol during the second time while configured in the second radiation state as directed by the state selection module.
2. The apparatus of claim 1 , further comprising:
at least one additional reconfigurable antenna for transmitting:
a third symbol during the first time while configured in a third radiation state as directed by the state selection module; and
a fourth symbol during the second time while configured in a fourth radiation state as directed by the state selection module.
3. The apparatus of claim 1 , further comprising:
at least one additional reconfigurable antenna for transmitting:
the second symbol during the first time while configured in a third radiation state as directed by the state selection module; and
the first symbol during the second time while configured in a fourth radiation state as directed by the state selection module.
4. The apparatus of claim 1 , wherein:
the first radiation state corresponding to at least one of a first radiation pattern, a first operating frequency, and a first polarization characteristic of the reconfigurable antenna; and
the second radiation state corresponding to at least one of a second radiation pattern, a second operating frequency, and a second polarization characteristic of the reconfigurable antenna.
5. The apparatus of claim 1 , wherein:
a plurality of reconfigurable antennae, that includes the reconfigurable antenna, for transmitting a plurality of symbols, that includes the first symbol and the second symbol; and wherein:
the first radiation state corresponding to at least one of a first radiation pattern, a first operating frequency, and a first polarization characteristic of a first of the plurality of reconfigurable antennae; and
the second radiation state corresponding to at least one of a second radiation pattern, a second operating frequency, and a second polarization characteristic of a second of the plurality of reconfigurable antennae.
6. The apparatus of claim 1 , further comprising:
a plurality of reconfigurable antennae, that includes the reconfigurable antenna, for transmitting a plurality of symbols, that includes the first symbol and the second symbol; and wherein:
the first radiation state or the second radiation state corresponding to at least one of a first radiation pattern, a first operating frequency, and a first polarization characteristic of a first of the plurality of reconfigurable antennae and corresponding to at least one of a second radiation pattern, a second operating frequency, and a second polarization characteristic of a second of the plurality of reconfigurable antennae.
7. The apparatus of claim 1 , wherein:
the apparatus receiving a feedback signal from at least one additional apparatus to which at least one of the first symbol and the second symbol being transmitted; and
based on the feedback signal, the state selection module adaptively directing the reconfigurable antenna to be configured in at least one additional radiation state.
8. The apparatus of claim 1 , wherein:
the state selection module directing operation of the reconfigurable antenna in accordance with a Space-Time-State Block Code (STS-BC).
9. The apparatus of claim 1 , further comprising:
a plurality of reconfigurable antennae, that includes the reconfigurable antenna, for transmitting a plurality of symbols, that includes the first symbol and the second symbol; and wherein:
the apparatus being a communication device; and
the communication device being operative within a multiple input multiple output (MIMO) communication system.
10. An apparatus, comprising:
a first reconfigurable antenna for transmitting:
a first symbol during a first time while configured in a first radiation state in accordance with a Space-Time-State Block Code (STS-BC); and
a second symbol during a second time while configured in a second radiation state in accordance with the STS-BC;
a second reconfigurable antenna for transmitting:
a third symbol during the first time while configured in a third radiation state in accordance with the STS-BC; and
a fourth symbol during the second time while configured in a fourth radiation state in accordance with the STS-BC,
wherein the first reconfigurable antenna also transmitting at least one of the second symbol, the third symbol, and the fourth symbol during the first time while configured in the first radiation state in accordance with the STS-BC.
11. The apparatus of claim 10 , further comprising:
a state selection module for directing operation of the first reconfigurable antenna and the second reconfigurable antenna based on the STS-BC.
12. The apparatus of claim 10 , wherein:
the apparatus receiving a feedback signal from at least one additional apparatus to which at least one of the first symbol, the second symbol, the third symbol, and the fourth symbol being transmitted; and
the apparatus adaptively modifying the STS-BC based on the feedback signal.
13. The apparatus of claim 10 , wherein:
the apparatus being a communication device; and the communication device being operative within a multiple input multiple output (MIMO) communication system.
14. A method, comprising:
from a first reconfigurable antenna, transmitting a first symbol during a first time while configured in a first radiation state in accordance with a Space-Time-State Block Code (STS-BC);
from the first reconfigurable antenna, transmitting a second symbol during a second time while configured in a second radiation state in accordance with the STS-BC;
from a second reconfigurable antenna, transmitting a third symbol during the first time while configured in a third radiation state in accordance with the STS-BC;
from the second reconfigurable antenna, transmitting a fourth symbol during the second time while configured in a fourth radiation state in accordance with the STS-BC; and
from the first reconfigurable antenna, also transmitting at least one of the second symbol, the third symbol, and the fourth symbol during the first time while configured in the first radiation state in accordance with the STS-BC.
15. The method of claim 14 , further comprising:
adaptively modifying the STS-BC based on a feedback signal received from a communication device to which at least one of the first symbol, the second symbol, the third symbol, and the fourth symbol being transmitted.
16. The method of claim 14 , wherein:
the first radiation state corresponding to at least one of a first radiation pattern, a first operating frequency, and a first polarization characteristic of the first reconfigurable antenna;
the second radiation state corresponding to at least one of a second radiation pattern, a second operating frequency, and a second polarization characteristic of the second reconfigurable antenna;
the third radiation state corresponding to at least one of a third radiation pattern, a third operating frequency, and a third polarization characteristic of the first reconfigurable antenna; and
the fourth radiation state corresponding to at least one of a fourth radiation pattern, a fourth operating frequency, and a fourth polarization characteristic of the second reconfigurable antenna.
17. The method of claim 14 , wherein:
the method being performed within a communication device; and
the communication device being operative within a multiple input multiple output (MIMO) communication system.