Synchronized multiple-radio antenna systems and methods
Multi-radio antenna apparatuses and stations for wireless networks including multiple radios coupled to a single transmit/receive antenna, in which the antenna is highly synchronized by an external (e.g., GPS) signal. These multi-radio antenna systems may provide highly resilient links. Synchronization may allow these apparatuses to organically scale the transmission throughput while preventing data loss. The single transmit/receive antenna may have a single dish or a compound (e.g., a single pair of separate transmitting and receiving dishes) and connections for two or more radios.
1. A method for operating a radio system, the method comprising:
synchronizing a plurality of radios based on an external clock signal in common for each of the plurality of radios to operate with identical transmit and receive duty cycles, wherein the external clock signal is based at least in part on a GPS signal;
generating an output signal by at least a subset of the plurality of radios, wherein a respective frequency channel of a given output signal for one radio is different from a respective frequency of a given output signal for each other radio;
combining a respective output signal from the plurality of radios to form a transmission signal; and
transmitting the transmission signal from a single antenna.
2. The method of claim 1 , wherein the output signals from the subset of the plurality of radios are generated simultaneously.
3. The method of claim 1 , wherein combining the respective output signal includes coupling the respective output signals to a passive power combiner and forming, by the passive power combiner, the transmission signal.
4. The method of claim 1 , wherein the GPS signal is received by the plurality of radios.
5. The method of claim 1 , further comprising simultaneously receiving a plurality of different radio frequency (RF) signals through the single antenna.
6. The method of claim 5 , wherein the plurality of received RF signals include a plurality of RF signals having different frequency channels.
7. The method of claim 1 , further comprising transmitting a synchronizing preamble based, at least in part, on the external clock signal.
8. The method of claim 7 , wherein the synchronizing preamble aligns transmit and receive frames associated with radios receiving the transmission signal.
9. The method of claim 1 , wherein each of the plurality of radios independently receives the external clock signal.
10. The method of claim 1 , wherein the external clock signal is received though the single antenna.
11. The method of claim 1 , wherein each of the plurality of radios include a receiver to receive the external clock signal.
12. An apparatus for transmitting radio signals comprising:
a plurality of radios configured to:
synchronize radio operations based on a common external clock signal to operate a plurality of radios with identical transmit and receive duty cycles, wherein the external clock signal is a based at least in part on a GPS signal;
generate, from at least a subset of the plurality of radios, an output signal, wherein a respective frequency channel of a given output signal for one radio is different from a respective frequency of a given output signal for each other radio; and
combine a respective output signal from the plurality of radios to form a transmission signal; and
a single antenna configured to transmit the transmission signal.
13. The apparatus of claim 12 , wherein the output signals from the subset of the plurality of radios are generated simultaneously.
14. The apparatus of claim 12 , wherein the plurality of radios are configured to independently receive the external clock signal.
15. The apparatus of claim 12 , wherein the single antenna is configured to receive the external clock signal.
16. A method for operating a radio system, the method comprising:
Synchronizing a plurality of radios to operate with identical transmit and receive duty cycles based on an external clock signal received at each of the plurality of radios, wherein the external clock signal is a based at least in part on a GPS signal;
generating an output signal by at least a subset of the plurality of radios, wherein a respective frequency channel of a given output signal for one radio is different from a respective frequency of a given output signal for each other radio; and
simultaneously transmitting respective output signals from the plurality of radios through a single antenna.