Method and system for modulating and detecting high datarate symbol communications
Patent 7254188 Issued on August 7, 2007. Estimated Expiration Date: 
December 16, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 16, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and device for estimating phase error Apparatus for generating timing signals for a digital television signal receiver Carrier phase estimation based on single-axis constant modulus cost criterion and Bussgang criteria Patent #: 7031405 InventorsAssigneeApplicationNo. 10737323 filed on 12/16/2003US Classes:375/324, Particular demodulator714/786, Forward error correction by tree code (e.g., convolutional)329/304, PHASE SHIFT KEYING OR QUADRATURE AMPLITUDE DEMODULATOR375/321, Single or vestigial sideband or suppressed carrier375/326Carrier recovery circuit or carrier trackingExaminersPrimary: Ghayour, MohammadAssistant: Williams, Lawrence Attorney, Agent or FirmInternational ClassH04L 27/14AbstractA method and system for modulating and detecting high datarate symbol communications provides superior performance in channels having a fixed spectral efficiency. A quadrature amplitude modulation (QAM) constellation and an optimized mapping are employed to encode/detect a communications signal and error correction is provided using high speed forward error correction techniques. A log likelihood detection scheme and/or a novel phase detector may be employed to further enhance performance. | |
