Wideband beamformer system

Patent metadata

Field	Value
Publication number	US-9853668-B2
Application number	US-201615297215-A
Country	US
Kind code	B2
Filing date	Oct 19, 2016
Priority date	Oct 21, 2013
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

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 process for synthesizing an individual antenna beam pattern to each individual cellular transmitter within a predetermined cellular band to a receiving antenna to optimize signal-to-noise (SNR) of emitted transmitter signals therefrom comprising:
scanning a predetermined cellular band and constructing a database of individual cellular transmitters emitting signals at or above the predetermined threshold;
electronically steering a high gain antenna beam main lobe at each individual cellular transmitter emitting a signal at or above a predetermined threshold; and
simultaneously directing antenna nulls in the direction of individual cellular transmitters interfering with each of the other individual cellular transmitters within the predetermined cellular band.

2. The process according to claim 1 , further comprising:
isolating by a wideband adaptive beamformer each of the emitted transmitter signals and beam forming each of the emitted transmitter signals to attenuate co-channel interference from one or more neighboring signals; and
reconstructing each of the emitted transmitter signals in a format for processing by one or more receivers.

3. The process according to claim 2 , wherein each of the reconstructed emitted transmitter signals has a signal to noise ratio of greater than or equal to approximately 7.0 dB.

4. The process according to claim 1 , wherein scanning the predetermined cellular band is performed periodically and the database of individual cellular transmitters emitting signals at or above the predetermined threshold is updated to include additional detected transmitters and remove previously detected transmitters emitting signals below the predetermined threshold.

5. The process according to claim 4 , further comprising:
electronically steering a high gain antenna beam main lobe at each individual cellular transmitter in the updated database; and
simultaneously directing antenna nulls in the direction of individual cellular transmitters interfering with each of the other individual cellular transmitters within the updated database.

6. The process according to claim 5 , further comprising:
isolating by a wideband adaptive beamformer each of the emitted transmitter signals from each individual cellular transmitter in the updated database and beam forming each of the emitted transmitter signals to attenuate co-channel interference from one or more neighboring signals; and
reconstructing each of the emitted transmitter signals in a format for processing by one or more receivers.

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

• H04B7/0617

  for beam forming · CPC title

• H04B7/08 Primary

  at the receiving station · CPC title