Invention Grant
- Patent Title: Time-domain and frequency-domain approach to frequency offset correction method for LTE SC-FDMA uplink
-
Application No.: US16363467Application Date: 2019-03-25
-
Publication No.: US10944496B2Publication Date: 2021-03-09
- Inventor: Jian Cui , Joshua C. Park , Paul McFarthing
- Applicant: PhasorLab, Inc.
- Applicant Address: US MA Billerica
- Assignee: PhasorLab, Inc.
- Current Assignee: PhasorLab, Inc.
- Current Assignee Address: US MA Billerica
- Agent Michael Saji
- Main IPC: H04J11/00
- IPC: H04J11/00 ; H04L25/03 ; H04L27/26 ; H04L27/36

Abstract:
Systems and methods for canceling carrier frequency offset (CFO) and sampling frequency offset (SFO) in a radio receive chain are disclosed. In one embodiment, a method is disclosed, comprising: receiving a sub-frame via a radio receive chain in a time domain; performing per-user filtering on the sub-frame to obtain a signal for a particular user; obtaining a CFO correction signal; adding the CFO correction signal in the time domain to perform a CFO correction step on the signal for the particular user; performing an FFT on the output of the CFO correction step to obtain samples in a frequency domain; adding an SFO correction signal in the frequency domain to perform an SFO correction to the output of FFT step; and demodulating the output of SFO correction step, thereby performing CFO and SFO correction while reducing inter-carrier interference (ICI).
Public/Granted literature
- US20190222337A1 Time-Domain and Frequency-Domain Approach to Frequency Offset Correction Method for LTE SC-FDMA Uplink Public/Granted day:2019-07-18
Information query