Invention Grant
US07869551B2 Symbol synchronization using phase discontinuity for DVB-T systems in AWGN channels
失效
在AWGN信道中使用DVB-T系统的相位不连续的符号同步
- Patent Title: Symbol synchronization using phase discontinuity for DVB-T systems in AWGN channels
- Patent Title (中): 在AWGN信道中使用DVB-T系统的相位不连续的符号同步
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Application No.: US11874337Application Date: 2007-10-18
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Publication No.: US07869551B2Publication Date: 2011-01-11
- Inventor: S Harish Krishnan , Parag Naik
- Applicant: S Harish Krishnan , Parag Naik
- Applicant Address: US DE Dover
- Assignee: Tamiras Per Pte. Ltd., LLC
- Current Assignee: Tamiras Per Pte. Ltd., LLC
- Current Assignee Address: US DE Dover
- Agency: Christensen O'Connor Johnson Kindness PLLC
- Main IPC: H04L7/00
- IPC: H04L7/00

Abstract:
At a receiver incoming coded OFDM Symbol Data are passed through a Coarse Symbol Timing Synchronization module to determine the approximate start of the symbol. In one embodiment this is accomplished through correlation. The symbol is then passed through an FFT (2K or 8K, depending on the mode desired by the receiver). Since the Coarse Symbol Timing Synchronization module only determines an approximate start point of the symbol, a process of fine synchronization is used to adjust this approximate start point and determine a more accurate start point of the symbol. In this manner, the receiver is enabled to process COFDM symbols in DVB-T transmissions (where the symbols include a cyclic prefix to overcome echoes). One output of an FFT operation is magnitude. Magnitude is used for Channel Estimation (or Channel Correction). Another output of an FFT operation is phase discontinuity or rotations. Phase discontinuities are used in a fine synchronization process to determine the number of phase discontinuities. Phase discontinuity data of the symbol is passed through an N-Point FFT.
Public/Granted literature
- US20080118006A1 SYMBOL SYNCHRONIZATION USING PHASE DISCONTINUITY FOR DVB-T SYSTEMS IN AWGN CHANNELS Public/Granted day:2008-05-22
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