Design of GMSK Frequency Hopping Modulation Scheme Based on FPGA

Authors

  • Lijun Ge School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • Xiaoying Li School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • Xiaoxiao Wang School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387, China

Keywords:

GMSK modulation, frequency hopping communication, FPGA, phase accumulator, CORDIC algorithm.

Abstract

An FPGA-based GMSK frequency hopping modulation scheme is designed. The design of the frequency hopping module is added to modulation scheme, and used the digital implementation of GMSK modulation. The pre-encoded symbols are first processed by a Gaussian filter and then sent to a phase accumulator to calculate the accumulated phase. The accumulated phase is summed with the phase generated by frequency-hopping carriers of frequency hopping module to obtain the total phase, and finally we use the CORDIC algorithm to perform the cosine operation on the total phase to realize the GMSK frequency hopping modulation of the signal. This scheme is implemented on the FPGA. After testing and verification, this scheme can realize the frequency hopping function of the system. The design of the phase accumulator ensures the phase continuity of GMSK signal, and the CORDIC algorithm eliminates a large number of multiplication operations. The hardware implementation is simpler and improves the feasibility of the scheme.

References

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Published

2018-09-25

How to Cite

Ge, L., Li, X., & Wang, X. (2018). Design of GMSK Frequency Hopping Modulation Scheme Based on FPGA. American Scientific Research Journal for Engineering, Technology, and Sciences, 47(1), 28–38. Retrieved from https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/4375

Issue

Vol. 47 No. 1 (2018)

Section

Articles

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