An Efficient Carrier Synchronization Scheme for Demodulation Systems
| Autor: | Zhugang Wang, Ruru Mei, Meiyan Lin, Wanru Hu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
TK7800-8360
Computer Networks and Communications Computer science variable modulation systems carrier synchronization RLR pilot-aided phase linear interpolation algorithm Linear interpolation Communications system Hardware and Architecture Control and Systems Engineering Modulation Carrier frequency offset Signal Processing Bit error rate Demodulation Multiplication Electronics Electrical and Electronic Engineering Symbol rate Algorithm |
| Zdroj: | Electronics; Volume 10; Issue 23; Pages: 2942 Electronics, Vol 10, Iss 2942, p 2942 (2021) |
| ISSN: | 2079-9292 |
| DOI: | 10.3390/electronics10232942 |
| Popis: | A simple data-aided carrier synchronization scheme is proposed for variable modulation (VM) communication systems under the initial conditions of a low signal-to-noise ratio (SNR) and normalized carrier frequency offset (CFO) symbol rate of 20%. The proposed carrier synchronization scheme is simplified into two steps; a reconfigurable L&R (RLR) algorithm and pilot-aided (PA) phase linear interpolation algorithm is applied for carrier frequency recovery (CFR) and carrier phase recovery (CPR), respectively. Furthermore, the autocorrelation values of multi-pilot blocks are superimposed to improve the accuracy of the CFR algorithm, and the algorithm formulas are decomposed and modularized to simplify the implementation complexity of the RLR algorithm. Simulation results show that the RLR algorithm can track and lock the CFO up to a 33.2% symbol rate and reduce the CFO to 0.024%. The bit error rate (BER) performance of the carrier synchronization scheme almost coincides with the theoretical curve results. Comparison of hardware complexity shows that the multiplication resource consumption can be reduced by at least 72.47%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|