IEICE Communications Express
Online ISSN : 2187-0136
ISSN-L : 2187-0136
A differential 16QAM BICM scheme for communications with carrier frequency offset
Hua-Lung TsaiJia-Jun HungShih-Hao ChangShih-Kai LeeMao-Chao Lin
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2015 Volume 4 Issue 6 Pages 205-210

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Abstract

In a 16QAM communication system, its carrier frequency offset (CFO) can be estimated by employing 4th power method if the 16QAM has 90-degree rotational invariance and the phase ambiguity can be removed by differential encoding. In this letter, we propose a new two-level differentially encoded 16QAM (TD16QAM) design which is suitable for tackling the CFO problem. The proposed TD16QAM is superior to the previously known TD16QAM in the bit-interleaved coded modulation (BICM) system corrupted by CFO.

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© 2015 The Institute of Electronics, Information and Communication Engineers
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