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Journal Article
Robust Frame Synchronization for Low Signal-to-Noise Ratio Channels Using Energy-Corrected Differential Correlation
- Authors
- Dong Uk Lee, Pan Soo Kim, Won Jin Sung
- Issue Date
- 2009-04
- Citation
- EURASIP Journal on Wireless Communications and Networking, v.2009, pp.1-8
- ISSN
- 1687-1499
- Publisher
- Hindawi Publishing, Springer
- Language
- English
- Type
- Journal Article
- Abstract
- Recent standards for wireless transmission require reliable synchronization for channels with low signal-to-noise ratio (SNR) as well as with a large amount of frequency offset, which necessitates a robust correlator structure for the initial frame synchronization process. In this paper, a new correlation strategy especially targeted for low SNR regions is proposed and its performance is analyzed. By utilizing a modified energy correction term, the proposed method effectively reduces the variance of the decision variable to enhance the detection performance. Most importantly, the method is demonstrated to outperform all previously reported schemes by a significant margin, for SNRs below 5 dB regardless of the existence of the frequency offsets. A variation of the proposed method is also presented for further enhancement over the channels with small frequency errors. The particular application considered for the performance verification is the second generation digital video broadcasting system for satellites (DVB-S2).
- KSP Keywords
- Broadcasting system, Correction term, DVB-S2, Decision variable, Differential correlation, Digital video broadcasting, Frequency error, Performance verification, Second generation(2G), Signal noise ratio(SNR), Signal-to-noise ratio channels
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
