Invention Grant
- Patent Title: Dual frequency tracking loop for OFDMA systems
- Patent Title (中): 用于OFDMA系统的双频跟踪环路
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Application No.: US12824958Application Date: 2010-06-28
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Publication No.: US09071493B2Publication Date: 2015-06-30
- Inventor: Brian C. Banister , Shivratna G. Srinivasan , Matthias Brehler , Sunil Kumar Kandukuri Narayana , Raghu N. Challa
- Applicant: Brian C. Banister , Shivratna G. Srinivasan , Matthias Brehler , Sunil Kumar Kandukuri Narayana , Raghu N. Challa
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent François A. Pelaez
- Main IPC: H03D3/24
- IPC: H03D3/24 ; H04L27/26 ; H03J1/00 ; H04L27/00

Abstract:
Methods and apparatus for correcting frequency errors between a carrier frequency of a signal received by a wireless device and a reference frequency local to the device. For certain aspects, such a method generally includes receiving a signal in a receiver having an LO producing a reference frequency, a radio frequency (RF) phase-locked loop (PLL), and a digital rotator, estimating a frequency difference between a carrier frequency of the received signal and the LO reference frequency, and applying the estimated frequency difference to the RF PLL and the digital rotator.
Public/Granted literature
- US20110158367A1 DUAL FREQUENCY TRACKING LOOP FOR OFDMA SYSTEMS Public/Granted day:2011-06-30
Information query
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