Interference suppression, method and device, in reception, for a wideband radio signal
AssigneeThales
InventorsValéry Leblond, Alain Renard, Franck Letestu
Life of this patent
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Abstract
Apparatus and methods degarble a received broadband radio signal using spatial filtering. The apparatus and methods use various garbled versions of the signal delivered by parallel processing chains assumed to have the same transfer function. Automatic equalization (4d), at the level of the outputs of the processing chains (2a to 2g), is performed before the spatial filtering (3). The automatic equalization reduces disparities, innate or originate from drifts over time, between processing chains (2a to 2g), and uses a local test signal generator (5).
Claims42
A method for processing a radio signal, comprising:
- receiving a signal by a set of processing chains;
- equalizing an output of at least one processing chain using an adjustable temporal equalization filter, based upon differences between a test signal processed by the processing chain and a reference version of the test signal;
- and
- spatial filtering the equalized radio signal processed by each processing chain.
A device for processing a radio signal, comprising:
- a set of parallel processing chains having identical transfer functions, each parallel processing chain having an input and an output;
- a spatial filter performing a weighted linear combination of the output of the parallel processing chains;
- a test signal generator for generating a test signal;
- at least one circuit for injecting the test signal provided by the test signal generator into each input of the parallel processing chains;
- and
- a bank of automatic equalization circuits, each equalization circuit arranged at the output of each parallel processing chain.
Dependencies are inferred from the claim text.