A Simplified Blind Carrier Frequency Offset Estimation Algorithm Based on the Power of Zero-Subcarriers for CO-OFDM Systems

2020 ◽  
Author(s):  
Xinwei Du ◽  
Changyuan Yu ◽  
Pooi-Yuen Kam
Keyword(s):  
Carrier Frequency ◽  
Carrier Frequency Offset ◽  
Estimation Algorithm ◽  
Frequency Offset ◽  
Ofdm Systems ◽  
Frequency Offset Estimation ◽  
Carrier Frequency Offset Estimation

scholarly journals Carrier Frequency Offset Estimation Algorithm in the Presence of I/Q Imbalance in OFDM Systems

2011 ◽  
pp. 148-153
Author(s):  
K. Jagan Mohan ◽  
K. Suresh ◽  
J. Durga Rao
Keyword(s):  
Carrier Frequency ◽  
Carrier Frequency Offset ◽  
Estimation Algorithm ◽  
Frequency Offset ◽  
Ofdm Systems ◽  
Frequency Offset Estimation ◽  
Signal Model ◽  
Estimation Performance ◽  
Carrier Frequency Offset Estimation ◽  
Virtual Carrier

In this paper, we analyzed the feasibility of using a virtual carrier based carrier frequency offset estimation algorithm in the presence of I/Q imbalance in OFDM systems. Based on the analysis of the signal model with both receiver CFO and I/Q imbalance impairment we conclude that it is feasible to extending the virtual carrier based CFO estimation algorithm to the I/Q imbalance scenario. The CFO estimation performance is evaluated through computer simulation. Impact of parameters on the estimation performance is investigated and it is consistent with our analysis. After CFO correction, a blind based I/Q imbalance estimation and compensation algorithm is applied. The final detection performance demonstrates that the virtual carrier based CFO estimation performance is good enough for subsequent I/Q imbalance estimation and compensation.

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