Digital radio communication
AssigneeNordic Semiconductor ASA
InventorWei Li
Life of this patent
Estimating the term…
Abstract
A method of operating a digital radio receiver comprising: receiving a radio signal; passing said radio signal to a correlator for correlating said radio signal with a predetermined pattern to provide an output signal comprising a plurality of peaks separated in time; determining an amplitude of a first peak in the plurality of peaks; calculating a selection threshold based on said first peak amplitude; determining an amplitude of a second peak in the plurality of peaks; comparing said second peak amplitude to the selection threshold; and identifying the second peak as a correlation peak if the second peak amplitude is greater than the selection threshold.
Claims23
A method of operating a digital radio receiver comprising:
- receiving a radio signal;
- passing said radio signal to a correlator for correlating said radio signal with a predetermined pattern to provide an output signal comprising a plurality of peaks separated in time;
- determining an amplitude of a first peak in the plurality of peaks;
- calculating a selection threshold based on said first peak amplitude;
- determining an amplitude of a second peak in the plurality of peaks;
- calculating a time separation between the first peak and the second peak;
- determining if the time separation is an expected value or within an expected range;
- if the time separation is an expected value or within an expected range, identifying the second peak as a correlation peak;
- if the time separation is not an expected value or not within an expected range, comparing said second peak amplitude to the selection threshold based on said first peak amplitude;
- and
- identifying the second peak as a correlation peak if the second peak amplitude is greater than the selection threshold.
An apparatus comprising a digital radio receiver for receiving a radio signal, and a correlator for correlating the radio signal with a predetermined pattern to provide an output signal comprising a plurality of peaks separated in time, the digital radio receiver arranged to:
- pass said radio signal to the correlator to produce an output signal comprising a plurality of peaks separated in time;
- determine an amplitude of a first peak in the plurality of peaks;
- calculate a selection threshold based on said first peak amplitude;
- determine an amplitude of a second peak in the plurality of peaks;
- calculate a time separation between the first peak and the second peak in the plurality of peaks;
- determine if the time separation is an expected value or within an expected range;
- if the time separation is an expected value or within an expected range, identify the second peak as a correlation peak;
- if the time separation is not an expected value or not within an expected range, compare said second peak amplitude to the selection threshold based on said first peak amplitude;
- and
- identify the second peak as a correlation peak if the second peak amplitude is greater than the selection threshold.
A non-transitory computer readable medium comprising software, when run on a data processing apparatus, to cause the data processing apparatus to:
- receive a radio signal from a digital radio receiver;
- correlate said radio signal with a predetermined pattern to provide an output signal comprising a plurality of peaks separated in time;
- determine an amplitude of a first peak in the plurality of peaks;
- calculate a selection threshold based on said first peak amplitude;
- determine an amplitude of a second peak in the plurality of peaks;
- calculate a time separation between the first peak and the second peak in the plurality of peaks;
- determine if the time separation is an expected value or within an expected range;
- if the time separation is an expected value or within an expected range, identify the second peak as a correlation peak;
- if the time separation is not an expected value or not within an expected range, compare said second peak amplitude to the selection threshold based on said first peak amplitude;
- and
- identify the second peak as a correlation peak if the second peak amplitude is greater than the selection threshold.
Dependencies are inferred from the claim text.