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Information 2018, 9(12), 313;

Low-Complexity Synchronization Scheme with Low-Resolution ADCs

1,2,3,* , 1,2
School of Automation and Electronic Information Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
Artificial Intelligence Key Laboratory of Sichuan Province, Sichuan University of Science and Engineering, Zigong 643000, China
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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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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