Detection of Data in Signals with Data Pattern Dependent Signal Distortion
First Claim
Patent Images
1. A system for detecting data in a signal with data pattern dependent signal distortion, the system comprising:
- a distorted signal table configured to store a plurality of known data patterns and samples of distorted signals associated with the known data patterns;
a data shift register configured to obtain samples of a received signal within a shifting data pattern window having a length corresponding to a length of the known data patterns; and
a detector configured to compare the samples in the data pattern window with the samples in the distorted signal table and to select the known data patterns in the distorted signal table that correspond most closely with the samples in the data pattern window.
4 Assignments
0 Petitions
Accused Products
Abstract
A detection system and method may be used to detect data transmitted in a signal with data pattern dependent signal distortion. In general, a detection system and method compares samples of a received signal with stored samples of distorted signals associated with known data patterns and selects the known data patterns that correspond most closely with the samples of the received signal. The detection system and method may thus mitigate the effects of data pattern dependent signal distortion.
-
Citations
21 Claims
-
1. A system for detecting data in a signal with data pattern dependent signal distortion, the system comprising:
-
a distorted signal table configured to store a plurality of known data patterns and samples of distorted signals associated with the known data patterns; a data shift register configured to obtain samples of a received signal within a shifting data pattern window having a length corresponding to a length of the known data patterns; and a detector configured to compare the samples in the data pattern window with the samples in the distorted signal table and to select the known data patterns in the distorted signal table that correspond most closely with the samples in the data pattern window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 21)
-
-
10. A digital signal processor (DSP) based receiver comprising:
-
a coherent receiver configured to receive, detect and digitize a modulated optical signal to produce received signal samples; and a DSP configured to store a distorted signal table including a plurality of known data patterns and samples of distorted signals associated with the known data patterns, to obtain samples of a received signal within a shifting data pattern window having a length corresponding to a length of the known data patterns, to compare the samples in the data pattern window with the samples in the distorted signal table, and to select the known data patterns in the distorted signal table that correspond most closely with the samples in the data pattern window. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A detection method for detecting data in a signal with data pattern dependent signal distortion, the method comprising:
-
providing a distorted signal table including a plurality of known data patterns and samples of distorted signals associated with the known data patterns; receiving a digitized signal including a plurality of digitized samples; processing the digitized signal in a digital signal processor to obtain a segment of samples in the received signal having a length corresponding to a length of the known data patterns, to compare the samples in the segment of the received signal with the samples associated with the known signal patterns, and to select the data patterns in the distorted signal table that correspond most closely with the samples in the segment of the received signal. - View Dependent Claims (16, 17, 18)
-
-
19. A training method for training a system for detecting data in a signal with data pattern dependent signal distortion, the method comprising:
-
receiving in a receiver a signal representing a training data sequence; digitizing the received signal to produce signal samples associated with the training data sequence; and processing the digitized received signal in a digital signal processor to arrange the received signal samples into data pattern dependent sets based on data patterns and to store the received signal samples as a distorted signal table indexed by the data patterns. - View Dependent Claims (20)
-
Specification