System and method for dual-band backhaul radio
A method and system are provided. The system includes a communication system including a first transmitter/receiver operating on a first frequency and a second transmitter/receiver operating on a second frequency. The system also includes a controller monitoring at least one of interference and throughput on the first and second transmitter/receiver and shifting demand based on the monitoring.
1. A dual-band 4×4 MIMO radio, comprising:
two orthogonal antennas, each of the two orthogonal antennas transmitting or receiving data on dual channels in a first frequency using a multiple-input-multiple-output (MIMO) baseband processor that places two signals in orthogonal polarization using radio frequency (RF) two converters that are tuned to different channels within the first frequency to produce four data streams; and
custom RF front-end that provides optimal performance on a receiver noise figure by sharing a low noise amplifier for the dual channels on the same polarization, the custom RF front-end further comprising two distinct power amplifiers for the two orthogonal antennas that provide isolation between the dual channels to avoid intermodulation distortion, wherein outputs of the power amplifiers are combined using a hybrid combiner and a transmit-receive switch that receives the outputs of the power amplifiers, the transmit-receive switch being coupled to the two orthogonal antennas.
2. The dual-band 4×4 MIMO radio according to claim 1 , further comprising a quadrature amplitude modulation decoder that separates the four data streams from the dual-band 4×4 MIMO radio.
3. The dual-band 4×4 MIMO radio according to claim 1 , wherein the two orthogonal antennas are coupled to four antenna probes within coaxial waveguides.
4. The dual-band 4×4 MIMO radio according to claim 3 , wherein the two orthogonal antennas and the four antenna probes are housed within a single dish housing.
5. The dual-band 4×4 MIMO radio according to claim 4 , wherein two of the four antenna probes are housed within a first waveguide and another two of the four antenna probes are housed within a second waveguide.
6. The dual-band 4×4 MIMO radio according to claim 5 , wherein the first waveguide is concentric with the second waveguide.
7. The dual-band 4×4 MIMO radio according to claim 6 , wherein the two of the four antenna probes that are housed within the first waveguide are vertically polarized.
8. The dual-band 4×4 MIMO radio according to claim 7 , wherein the another two of the four antenna probes that are housed within the second waveguide are horizontally polarized.
9. The dual-band 4×4 MIMO radio according to claim 1 , wherein the MIMO baseband processor comprises a 4×4 baseband processor.
10. The dual-band 4×4 MIMO radio according to claim 1 , wherein the two converters each comprise a 2×2 RF chipset.
11. The dual-band 4×4 MIMO radio according to claim 10 , wherein a first of the two converters is coupled with a splitter that couples with the low noise amplifier.
12. The dual-band 4×4 MIMO radio according to claim 11 , wherein the first of the two converters is coupled with one of the two distinct power amplifiers.
13. A system, comprising:
a 4×4 multiple-input-multiple-output (MIMO) baseband processor; and
a pair of radio-frequency front-ends, each comprising:
a splitter that couples with a first converter that couples with the 4×4 multiple-input-multiple-output (MIMO) baseband processor;
two distinct power amplifiers, a first of the two distinct power amplifiers coupled with a second converter that couples with the 4×4 multiple-input-multiple-output (MIMO) baseband processor;
a low-noise amplifier that couples with the splitter;
a hybrid combiner that is coupled to both of the two distinct power amplifiers; and
a transmit-receive switch coupled to both the low-noise amplifier and the hybrid combiner.
14. The system according to claim 13 , further comprising two orthogonal antennas coupled to the transmit-receive switch.
15. The system according to claim 14 , wherein each of the two orthogonal antennas transmits or receives data on dual channels in a first frequency as controlled by the 4×4 multiple-input-multiple-output (MIMO) baseband processor.
16. The system according to claim 15 , wherein the 4×4 multiple-input-multiple-output (MIMO) baseband processor places two signals in orthogonal polarization using radio frequency (RF) two converters that are tuned to different channels within the first frequency to produce four data streams.
17. The system according to claim 15 , wherein a first of the pair of radio-frequency front-ends operates in the first frequency and a second of the pair of radio-frequency front-ends operates in a second frequency.
18. The system according to claim 17 , wherein the first frequency comprises 5 GHz and the second frequency comprises 24 GHz.