Abstract
Based on software defined radio (SDR) architecture, this paper develops a reconfigurable CORDIC vectoring module (CVM) and CORDIC rotation module (CRM) in FPGA to implement the carrier frequency offset (CFO) estimation and compensation circuits of an orthogonal frequency division multiplexing (OFDM) system. The experimental results show that the proposed SDR-pipelined architecture can save power and hardware resource compared with conventional pipelined architecture, because the designed CVM and CRM modules can be reused in the processing modules of CFO estimation and compensation circuit. The performance trade-off for CVM and CRM implemented with different quantized float number in FPGA is presented. Furthermore, the hardware reconfiguration function of CVM and CRM is also validated.
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Acknowledgements
The research work was supported by Chung-Shan Institute of Science and Technology and National Science Council, R.O.C. (NSC 97-2221-E-155-002). The authors express their gratitude to reviewers’ suggestions for improving the presentation of the paper.
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Mar, J., Kuo, CC. & Chou, SH. FPGA Implementation of SDR Based CFO Estimation and Compensation Circuit for OFDM System. J Sign Process Syst 66, 141–146 (2012). https://doi.org/10.1007/s11265-011-0621-y
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DOI: https://doi.org/10.1007/s11265-011-0621-y