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Information 2018, 9(12), 313; https://doi.org/10.3390/info9120313

Low-Complexity Synchronization Scheme with Low-Resolution ADCs

1,2,3,* , 1,2
and
1,2
1
School of Automation and Electronic Information Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
2
Artificial Intelligence Key Laboratory of Sichuan Province, Sichuan University of Science and Engineering, Zigong 643000, China
3
Advanced Avionics and Intelligent Information Laboratory of Shanghai Jiao Tong University, Shanghai 200240, China
*
Author to whom correspondence should be addressed.
Received: 27 October 2018 / Revised: 23 November 2018 / Accepted: 6 December 2018 / Published: 7 December 2018
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Abstract

An important function of next-generation (5G) and beyond mobile communication systems is aim to provide thousand-fold capacity growth and to support high-speed data transmission up to several megabits per second. However, the research community and industries have to face a dilemma of power consumption and hardware design to satisfy the increasing communication requirements. For the purpose of improving the system cost, power consumption, and implementation complexity, a novel scheme of symbol timing and frequency offset estimation with low-resolution analog-to-digital converters (ADCs) based on an orthogonal frequency division multiplexing ultra-wideband (OFDM-UWB) system is proposed in this paper. In our work, we first verified the principle that the autocorrelation of the pseudo-noise (PN) sequences was not affected by low-resolution quantization. With the help of this property, the timing synchronization could be strongly implemented against the influence of low-resolution quantization. Then, the transmitted signal structure and low-resolution quantization scheme under the synchronization scheme were designed. Finally, a frequency offset estimation model with one-bit timing synchronization was established. Theoretical analysis and simulation results corroborate that the performance of the proposed scheme not only approximates to that of the full-resolution synchronization scheme, but also has lower power consumption and computational complexity. View Full-Text
Keywords: low-resolution analog-to-digital converter (ADC); synchronization; receiver; orthogonal frequency division multiplexing (OFDM) low-resolution analog-to-digital converter (ADC); synchronization; receiver; orthogonal frequency division multiplexing (OFDM)
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Jun, L.; Zhongqiang, L.; Xingzhong, X. Low-Complexity Synchronization Scheme with Low-Resolution ADCs. Information 2018, 9, 313.

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