Frame erasure for digital data transmission systems
AssigneeNEC Corporation
InventorMark Burton
Life of this patent
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Abstract
A method of improving frame erasure performance, in particular for slow frequency hopping channels with cyclic co-channel interference, by selection of the most suitable PBER threshold from a range of PBER thresholds. A burst quality metric is assigned to each burst in a frame and the bursts are then ranked in the order of the values of the assigned quality metrics. The differences in the metrics between successive bursts in the ranked order are measured. The position in the ranked order of the largest difference between bursts (dMAX) is used in the selection of the most suitable PBER threshold.
Claims8
A method of identifying a frame for erasure in a digital data transmission system by use of an adaptive pseudo bit error rate (PBER) threshold, comprising:
- estimating the quality of each burst in a series of bursts;
- ranking each burst according to the quality estimates to form a ranked series of bursts;
- measuring a value of the largest difference in the quality estimates between successive bursts in the ranked series of bursts;
- and
- setting the PBER threshold level based on a position in the ranked order and on the measured value.
Dependencies are inferred from the claim text.