System with transmitter and receiver remote from one another and configured to provide a channel capacity that exceeds a saturation channel capacity
An embodiment of a system includes a transmitter and a receiver that is remote from the transmitter. The transmitter includes a first number of transmit antennas and a signal generator. The transmit antennas are each spaced from another of the transmit antennas by approximately a distance and configured to provide, at one or more wavelengths that are greater than twice the distance, a channel capacity that exceeds a saturation channel capacity. And the signal generator is configured to generate a second number of signals each having a wavelength that is greater than twice the distance, the second number related to a third number of signal pipes, and to couple each of the second number of signals to a respective one of the transmit antennas. The receiver includes a fourth number of antennas and a signal analyzer. The receive antennas are each spaced from another of the receive antennas by approximately the distance, and are configured to provide, at one or more wavelengths that are greater than twice the distance, a channel capacity that exceeds the saturation channel capacity. And the signal analyzer is configured to recover information from each of the second number of signals received by at least one of the receive antennas over a respective one of the third number of signal pipes.
1. A system, comprising:
a transmitter including
a number of transmit antennas each spaced from another of the transmit antennas by approximately a distance and configured to provide, at one or more wavelengths that are greater than twice the distance, a channel capacity that exceeds a saturation channel capacity, and
a signal generator configured
to generate a number of signals each having a wavelength that is greater than twice the distance, the number of signals related to a first number of signal pipes, and
to couple each of the number of signals to a respective one of the transmit antennas; and
a receiver including
a number of receive antennas each spaced from another of the receive antennas by approximately the distance, and configured to provide, at one or more wavelengths that are greater than twice the distance, a channel capacity that exceeds the saturation channel capacity, and
a signal analyzer configured to recover information from each of the number of signals received by at least one of the number of receive antennas over a respective one of the first number of signal pipes.
2. The system of claim 1 wherein:
the number of transmit antennas form at least part of a transmit antenna array; and
the number of receive antennas form at least part of a receive antenna array.
3. The system of claim 1 wherein:
one of the number of transmit antennas is configured to have a first transmission characteristic;
another one of the number of transmit antennas is configured to have a second transmission characteristic that is different from the first transmission characteristic;
one of the number of receive antennas is configured to have a first reception characteristic; and
another one of the number of receive antennas is configured to have a second reception characteristic that is different from the first reception characteristic.
4. The system of claim 1 wherein:
the saturation channel capacity is the capacity of a second number of signal pipes that the number of transmit antennas and the number of receive antennas would provide if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas were to have a same reception profile; and
the first number of signal pipes exceeds the second number of signal pipes.
5. The system of claim 1 wherein:
the saturation channel capacity is the capacity of a second number of signal pipes, the second number of signal pipes being equal to a rank of a channel matrix that would represent a channel if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas were to have a same reception profile; and
the first number of signal pipes exceeds the second number of signal pipes.
6. The system of claim 1 wherein the saturation channel capacity is the channel capacity that the number of transmit antennas and the number of receive antennas would provide if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas were to have a same reception profile.
7. The system of claim 1 wherein the number of signals equals the first number of signal pipes.
8. The system of claim 1 wherein the number of signals is less than the first number of signal pipes.
9. The system of claim 1 wherein the first number of signal pipes equals the first number of transmit antennas.
10. The system of claim 1 wherein the first number of signal pipes is less than the number of transmit antennas.
11. The system of claim 1 wherein the first number of signal pipes equals the number of receive antennas.
12. The system of claim 1 wherein the first number of signal pipes is less than the number of receive antennas.
13. The system of claim 1 wherein the number of signals equals the number of transmit antennas.
14. The system of claim 1 wherein the number of signals is less than the number of transmit antennas.
15. The system of claim 1 wherein the number of transmit antennas equals the number of receive antennas.
16. The system of claim 1 wherein the number of transmit antennas is less than the number of receive antennas.
17. The system of claim 1 wherein the number of transmit antennas is greater than the number of receive antennas.
18. A method, comprising:
generating a number of signals each having a wavelength that is greater than twice a distance, the number of signals related to a first number of signal pipes of a channel having a capacity;
transmitting each of the number of signals over the channel with a respective one of a number of transmit antennas each spaced from another of the transmit antennas by approximately the distance such that the capacity of the channel exceeds a saturation capacity of the channel;
receiving each of the number of signals over the first number of signal pipes with at least one of a number of receive antennas each spaced from another of the receive antennas by approximately the distance such that the capacity of the channel exceeds the saturation capacity of the channel; and
recovering information from the received number of signals.
19. The method of claim 18 wherein:
transmitting each of the number of signals includes
transmitting one of the number of signals according to a first transmission characteristic, and
transmitting another one of the number of signals according to a second transmission characteristic that is different from the first transmission characteristic; and
receiving each of the number of signals includes
receiving one of the number of signals according to a first reception characteristic; and
receiving another one of the number of signals according to a second reception characteristic that is different from the first reception characteristic.
20. The method of claim 19 wherein:
transmitting the one of the number of signals according to the first transmission characteristic includes configuring a parameter of the one of the number of transmit antennas transmitting the one of the number of signals;
transmitting the other one of the number of signals according to the second transmission characteristic includes configuring a parameter of the one of the number of transmit antennas transmitting the other one of the number of signals;
receiving the one of the number of signals according to the first reception characteristic includes configuring a parameter of the one of the number of receive antennas receiving the one of the number of signals; and
receiving the other one of the number of signals according to the second reception characteristic includes configuring a parameter of the one of the number of receive antennas receiving the other one of the number of signals.
21. The method of claim 18 wherein:
the saturation capacity of the channel is the capacity of a second number of signal pipes that the number of transmit antennas and the number of receive antennas would provide if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas were to have a same reception profile; and
the first number of signal pipes exceeds the second number of signal pipes.
22. The method of claim 18 wherein:
the saturation capacity of the channel is the capacity of a second number of signal pipes, the second number of signal pipes being equal to a rank of a channel matrix that would represent the channel if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas were to have a same reception profile; and
the first number of signal pipes exceeds the second number of signal pipes.
23. The method of claim 18 wherein the saturation capacity of the channel is the channel capacity that the number of transmit antennas and the number of receive antennas would provide if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas were to have a same reception profile.
24. The method of claim 18 further including determining the first number of signal pipes.
25. The method of claim 18 , further including:
determining channel information; and
determining the first number of signal pipes in response to the channel information.
26. The method of claim 18 , further comprising:
configuring at least one of the number of transmit antennas in response to the first number of signal pipes having a relationship to a target number of signal pipes; and
configuring at least one of the number of receive antennas in response to the first number of signal pipes having a relationship to the target number of signal pipes.
27. A tangible non-transitory computer-readable medium storing instructions that, when executed by a computing machine, cause the computing machine, or circuitry under control of the computing machine:
to generate a number of signals each having a wavelength that is greater than twice a distance, the number of signals related to a first number of signal pipes of a channel having a capacity;
to transmit each of the number of signals over the channel with a respective one of a number of transmit antennas each spaced from another of the transmit antennas by approximately the distance such that the capacity of the channel exceeds a saturation capacity of the channel;
to receive each of the number of signals over the first number of signal pipes with at least one of a number of receive antennas each spaced from another of the receive antennas by approximately the distance such that the capacity of the channel exceeds the saturation capacity of the channel; and
to recover information from the received number of signals.
28. The tangible non-transitory computer-readable medium of claim 27 wherein:
the saturation capacity of the channel is the capacity of a second number of signal pipes that the number of transmit antennas and the number of receive antennas would provide if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas were to have a same reception profile; and
the first number of signal pipes exceeds the second number of signal pipes.
29. The tangible non-transitory computer-readable medium of claim 27 wherein:
the saturation capacity of the channel is the capacity of a second number of signal pipes, the second number of signal pipes being equal to a rank of a channel matrix that would represent the channel if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas where to have a same reception profile; and
the first number of signal pipes exceeds the second number of signal pipes.
30. The tangible non-transitory computer-readable medium of claim 27 wherein the saturation capacity of the channel is the channel capacity that the number of transmit antennas and the number of receive antennas would provide if each of the number of transmit antennas were to have a same transmission profile and each of the number of receive antennas were to have a same reception profile.