System and methods for scalable processing of received radio frequency beamform signal

Abstract

A system and method for scalable processing of a received radio frequency beamform signal is provided. Such a system and methods is useful in conjunction with long range communication between an airborne platform and a surface base station. The scalable system includes a plurality of antenna elements for receiving a directional beam, including a multiplexed data stream, from a base station. A down converter and analog to digital (A-D) converter may then down convert and digitize the multiplexed data stream. A digital splitter may de-multiplex the multiplexed data stream into multiple data streams which are orthogonal to one another. The de-multiplexing may be performed using a fast Fourier transformation on the multiplexed data stream. In these embodiments, the digital splitter divides the multiplexed data stream into frequency groups to de-multiplexing the multiplexed data stream into multiple data streams. The system may also include more than one digital signal processors configured to process the multiple data streams. As the bandwidth of the original multiplexed signal increases, so too can the number of digital signal processors be increased.

What is claimed is: 
     
         1 . A method for scalable processing of received radio frequency beamform signal, useful in conjunction with long range communication between an airborne platform and a surface base station, the method comprising:
 receiving a directional beam from a base station, wherein the directional beam includes a multiplexed data stream; and   de-multiplexing the multiplexed data stream into multiple data streams, wherein the multiple data streams are independent from to one another.   
     
     
         2 . The method as recited in  claim 1 , further comprising down converting the multiplexed data stream. 
     
     
         3 . The method as recited in  claim 1 , further comprising converting the multiplexed data stream from an analog to a digital signal. 
     
     
         4 . The method as recited in  claim 1 , further comprising processing the multiple data streams. 
     
     
         5 . The method as recited in  claim 1 , wherein the de-multiplexing the multiplexed data stream into multiple data streams includes performing a fast Fourier transformation on the multiplexed data stream. 
     
     
         6 . The method as recited in  claim 5 , wherein the de-multiplexing the multiplexed data stream into multiple data streams includes dividing the multiplexed data stream into frequency groups. 
     
     
         7 . A system for scalable processing of received radio frequency beamform signal, useful in conjunction with long range communication between an airborne platform and a surface base station, the system comprising:
 a plurality of antenna elements configured to receive a directional beam from a base station, wherein the directional beam includes a multiplexed data stream; and   a digital splitter configured to de-multiplex the multiplexed data stream into multiple data streams, wherein the multiple data streams are orthogonal to one another.   
     
     
         8 . The system as recited in  claim 7 , further comprising a down converter configured to down convert the multiplexed data stream. 
     
     
         9 . The system as recited in  claim 7 , further comprising an analog to digital converter configured to convert the multiplexed data stream from an analog to digital signal. 
     
     
         10 . The system as recited in  claim 7 , further comprising at least two digital signal processors configured to process the multiple data streams. 
     
     
         11 . The system as recited in  claim 10 , wherein the number of the at least two digital signal processors are increased as bandwidth of the multiplexed data stream increases. 
     
     
         12 . The system as recited in  claim 7 , wherein the digital splitter is configured to perform a fast Fourier transformation on the multiplexed data stream to de-multiplex the multiplexed data stream into multiple data streams. 
     
     
         13 . The system as recited in  claim 12 , wherein the digital splitter is configured to dividing the multiplexed data stream into frequency groups to de-multiplex the multiplexed data stream into multiple data streams. 
     
     
         14 . A system for scalable processing of received radio frequency beamform signal, useful in conjunction with long range communication between an airborne platform and a surface base station, the system comprising:
 a plurality of antenna elements configured to receive a directional beam from a base station, wherein the directional beam includes a multiplexed data stream;   a down converter configured to down convert the multiplexed data stream;   an analog to digital converter configured to convert the multiplexed data stream from an analog to digital signal;   a digital splitter configured to de-multiplex the multiplexed data stream into multiple data streams, wherein the multiple data streams are orthogonal to one another, wherein the digital splitter is configured to perform a fast Fourier transformation on the multiplexed data stream to de-multiplexing the multiplexed data stream into multiple data streams, and wherein the digital splitter is configured to dividing the multiplexed data stream into frequency groups to de-multiplexing the multiplexed data stream into multiple data streams; and   at least two digital signal processors configured to process the multiple data streams.