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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...
Polar codes are considered the latest major breakthrough in coding theory. Polar codes were introduced by Arıkan in 2008. It is shown that the binary polar codes are the same as the optimised codes for bitwise multistage decoding, which have been discovered before by Stolte in 2002. The equivalence between the techniques used for the constructions and decodings of both codes is established.
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