US 2019/0356347 A1Published application

Beam forming for first adjacent cancellation

AssigneeNXP B.V.

InventorWim van Houtum

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Abstract

A communications device includes aspects for improving reception of transmissions with first-adjacent co-channel interference signals corresponding to digitally-modulated side-bands of in-band on-channel (IBOC) broadcasted signals. The communications device may include a radio frequency (RF) signal-reception circuit including two RF-signal paths driven in response to signals received via at least two respective antennas, and configured to respond to signals carried in the respective RF-signal paths by providing pre-processed RF output signals. The communications device may further include a beam-forming circuit driven in response to signals received at the at least two respective antennas and configured and arranged to facilitate first-adjacent interference cancellation (FAC). The communications device can also include an interference-cancelling circuit configured and arranged to reduce the first-adjacent co-channel interference signals by combining a beam-forming output signal provided by the beam-forming circuit with the pre-processed RF output signals as part of a maximum ratio combining (MRC) process.

Claims19

Dependent claims

A communications device for improving reception of transmissions with first-adjacent co-channel interference signals corresponding to digitally-modulated side-bands of in-band on-channel (IBOC) broadcasted signals, the device comprising:

a radio frequency (RF) signal-reception circuit including two RF-signal paths driven in response to signals received via at least two respective antennas and including respectively-associated front-end circuits including analog-to-digital converter and signal-processing circuitry configured to respond to signals carried in the respective RF-signal paths by providing pre-processed RF output signals;
a beam-forming circuit driven in response to the signals received at the at least two respective antennas and configured and arranged in parallel with the two RF-signal paths of the RF signal-reception circuit to facilitate first-adjacent interference cancellation (FAC) by:
providing a beam forming for first adjacent cancellation (BFFAC) signal as a function of the first-adjacent co-channel interference signals;
using a statistically-based analysis to weight or assess a likelihood of the BFFAC signal indicating the first-adjacent co-channel interference signals are significant;
and
providing a beam-forming output signal in which weighting for noise-cancellation is provided for in response to the statistically-based analysis;
and
an interference-cancelling circuit configured and arranged to reduce the first-adjacent co-channel interference signals by combining the beam-forming output signal with the pre-processed RF output signals by using the statistically-based analysis of the BFFAC signal to compensate for the first-adjacent co-channel interference.

5 more elements

A method for improving reception of transmissions with first-adjacent co-channel interference signals corresponding to digitally-modulated side-bands of in-band on-channel (IBOC) broadcasted signals, the method comprising:

generating at least two radio frequency (RF)-signal paths in response to signals received via at least two respective antennas;
providing pre-processed RF output signals for each of the at least two RF-signal paths using respectively-associated front-end circuits including analog-to-digital converter and signal-processing circuitry;
in response to the signals received at the at least two respective antennas, facilitating first-adjacent interference cancellation (FAC) by:
providing a beam forming for first adjacent cancellation (BFFAC) signal as a function of the first-adjacent co-channel interference signals;
using a statistically-based analysis to weigh or assess a likelihood of the BFFAC signal indicating the first-adjacent co-channel interference signals are significant;
and
providing a beam-forming output signal in which weighting for noise-cancellation is provided for in response to the statistically-based analysis;
and
reducing the first-adjacent co-channel interference signals by combining the beam-forming output signal with the pre-processed RF output signals using the statistically-based analysis of the BFFAC signal to compensate for the first-adjacent co-channel interference.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/982,029Filed 17 May 2018
Published: 21 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04B 1/1036
Assessing signal quality or detecting noise/interference for the received signal: with automatic suppression of narrow band noise or interference,…
H04H 40/72
For FM stereophonic broadcast systems receiving: for noise suppression
H04B 7/0617
Of weighted versions of same signal: for beam forming
H04B 7/0857
Joint weighting: using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]

Family

US 10,581,476 B2Related patent
US 2019/0356347 A1This patent

From the US filing history. Foreign family members aren’t listed.

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