Frequency ambiguity free tiered differential-polyphase codes for GNSS signal design

To resolve frequency ambiguity of tiered polyphase code (TPC), a differential encoding method to the secondary code of the TPC is proposed. By performing differential decoding, the frequency ambiguity is removed and the code sequence boundary is correctly found. In addition, the correlation results...

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Bibliographic Details
Published in:Electronics letters 2017-04, Vol.53 (9), p.598-600
Main Authors: Han, S.K, Kim, J.-B, Kim, J.-K, Han, A, Kim, K.-J, Song, K.-W, Lee, S.-J, Ahn, J.M
Format: Article
Language:English
Subjects:
Ambiguity
Boundaries
code sequence boundary detection
Decoding
differential decoding
differential encoding method
Electronics
Estimators
frequency ambiguity free tiered differential‐PCs
frequency estimation
frequency offset estimator
GNSS signal design
Information and communications
Offsets
receiver operation
Receivers
root mean squared error
satellite navigation
signal detection
signal‐to‐noise power ratio
Simulation
tiered polyphase code
TPC
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Summary:To resolve frequency ambiguity of tiered polyphase code (TPC), a differential encoding method to the secondary code of the TPC is proposed. By performing differential decoding, the frequency ambiguity is removed and the code sequence boundary is correctly found. In addition, the correlation results at the receiver can be used as a frequency offset estimator. Analysis on the receiver operations and the simulation results show that the proposed tiered differential-PC makes the code sequence boundary detection correctly under the frequency offset of up to several hundred hertz. The root mean squared error of the frequency offset estimation is reduced to
ISSN:0013-5194
1350-911X
DOI:10.1049/el.2016.3680