Methods and systems for detecting a narrow-band interferer
AssigneeOlympus Corporation
InventorsDumitru Mihai Ionescu, Abu Amanullah, Ghobad Heidari-Bateni
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Abstract
Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.
Claims20
A method of detecting a narrow-band interference comprising:
- calculating a differential phase metric by:
- receiving a first OFDM signal at a pilot tone;
- receiving a second OFDM signal sent in the same frequency band;
- and
- determining a differential phase metric between the first OFDM signal and the second OFDM signal;
- comparing the differential phase metric to a predetermined threshold;
- and
- determining a likelihood that a narrowband interferer is present based on the comparison.
A system for of detecting a narrow-band interference comprising:
- an antenna;
- a processor, coupled to the antenna;
- and
- a memory, coupled to the processor and configured to store instructions causing the processor to:
- calculate a differential phase metric by:
- receiving a first OFDM signal at a pilot tone;
- receiving a second OFDM signal sent in the same frequency band;
- and
- determining a differential phase metric between the first OFDM signal and the second OFDM signal;
- compare the differential phase metric to a predetermined threshold;
- and
- determine a likelihood that a narrowband interferer is present based on the comparison.
Dependencies are inferred from the claim text.