Invention Grant
- Patent Title: Systems and methods for time synchronization between transmitters and receivers in a communication system
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Application No.: US15063030Application Date: 2016-03-07
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Publication No.: US09912511B2Publication Date: 2018-03-06
- Inventor: Shaohua Zhao , Wuxue Ni , Li Li
- Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
- Applicant Address: HK Shatin
- Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
- Current Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
- Current Assignee Address: HK Shatin
- Agency: Norton Rose Fulbright US LLP
- Main IPC: H04W84/12
- IPC: H04W84/12 ; H04L27/26 ; H04L27/00 ; H04L25/03

Abstract:
Systems and methods which provide training sequence or preamble-based synchronization with respect to non-coherent modulated signals and/or differentially coherent modulated signals are described. Embodiments provide for time synchronization using a technique for mitigating the effect of carrier frequency offset (CFO) with respect to the received signal. Embodiments of the present invention provide for frequency synchronization using a technique for estimating CFO using a constant bias induced with respect to the received signal by CFO. Additionally or alternatively, embodiments of the present invention provide for frequency synchronization using a technique for estimating CFO using phase rotation caused by CFO. The time synchronization and frequency synchronization of embodiments may be performed independently, without requiring the results of one synchronization operation for performing the other synchronization operation.
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