Wideband beamformer system

Patent metadata

Field	Value
Publication number	US-9484971-B2
Application number	US-201615149417-A
Country	US
Kind code	B2
Filing date	May 9, 2016
Priority date	Oct 21, 2013
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

An adaptive phased-array processing solution, referred to as the Wideband Beamformer System (WBS), demonstrates an improvement in the range and quality of air link surveillance downlink wireless cell radio signals. The WBS applies wideband frequency-domain adaptive beamforming to preprocess the dense RF signal environment, minimizing co-channel interference (CCI) from each signal, and then reconstructing a “clean” version of the signal for input to the existing surveillance receiver(s).

First claim

We claim:

1. A system for improving the quality of reception of multiple overlapping radio frequency input signals emitted from multiple transmitters comprising:
at least one subband adaptive filter including,
multiple channelizers for decomposing the multiple overlapping radio frequency input signals into individual channel signals,
a buffer for extracting individual channel signal data, an adaptive beamformer filter module,
multiple subband beamformer combiners,
multiple synthesizers; and

a weighting algorithm module, wherein the weighting algorithm module receives the individual channel signal data from the buffer and provides individualized weighted filter data to the adaptive beamformer filter module responsive thereto; and
further wherein the adaptive beamformer filter module provides the individualized weighted filter data to the multiple subband beamformer combiners for application to the individual channel signals.

2. The system of claim 1 further comprising first and second field-programmable gate arrays (FPGAs), each of the first and second FPGAs including a subband adaptive filter.

3. The system of claim 1 , wherein the multiple channelizers are vector FFT (Fast Fourier Transform) channelizers and the multiple synthesizers are scalar FFT (Fast Fourier Transform) synthesizers.

4. The system of claim 1 , further comprising an antenna array for receiving multiple overlapping wideband radio frequency emitter signals emitted from multiple transmitters and outputting multiple tuned input signals to the at least one subband adaptive filter.

5. The system of claim 1 , further comprising one or more receivers for receiving filtered output signals from the at least one subband adaptive filter.

Assignees

• Leidos Inc

Inventors

• Corbalis Leo James
• Illar David Scott

Classifications

• H04B1/123 Primary

  using adaptive balancing or compensation means (adaptive filter circuits and algorithms H03H) · CPC title

• H04B7/08 Primary

  at the receiving station · CPC title

• H04B7/0617

  for beam forming · CPC title