Frequency-Offset Estimation of Satellite-Based AIS Signals

2013 ◽  
Vol 765-767 ◽  
pp. 2732-2735 ◽  
Author(s):  
Xiao Juan Liu ◽  
She Xiang Ma ◽  
Xin Meng
Keyword(s):  
Carrier Frequency Offset ◽  
Estimation Method ◽  
Estimation Algorithm ◽  
Frequency Offset ◽  
Smoothing Function ◽  
Automatic Identification ◽  
Identification System ◽  
Frequency Offset Estimation ◽  
Carrier Frequency Offset Estimation ◽  
Better Than

Aiming at satellite-based Automatic Identification System (AIS) signals, a blind carrier frequency-offset estimation method was investigated on AWGN channels. Estimation algorithm that is based on the autocorrelation function and a suitable smoothing function was deduced to estimate the frequency-offset. Simulation results show that its accuracy is better than the earlier methods and reduced the computational complexity.

A Simplified Carrier Frequency Offset Estimation Algorithm for Burst Digital Transmission

2012 ◽  
Vol 239-240 ◽  
pp. 1255-1258
Author(s):  
Xin Man ◽  
Hai Tao Zhai ◽  
Er Yang Zhang
Keyword(s):  
Carrier Frequency ◽  
Carrier Frequency Offset ◽  
Estimation Method ◽  
Digital Transmission ◽  
Estimation Algorithm ◽  
Frequency Offset ◽  
Estimation Accuracy ◽  
Frequency Offset Estimation ◽  
Carrier Frequency Offset Estimation ◽  
Estimation Range

In this letter, we present a carrier frequency offset estimation method for burst digital transmission, by introducing a step factor into an earlier estimation algorithm to reduce the computational complexity, with little loss of the estimation accuracy. Performance simulations show that this method can separate the estimation range and accuracy, avoiding the weakness of reaching large estimation range at the expense of estimation accuracy.

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