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Multi-Signal Regeneration Effect of Quadrature Digital Radio-Frequency Memory

직교방식 디지털 고주파기억장치의 다중신호 재생성 효과

  • Lim, Joong-Soo (Division of Information Communication, Baekseok University)
  • Received : 2019.04.26
  • Accepted : 2019.08.20
  • Published : 2019.08.28

Abstract

This paper describes the effect of multiple signal regeneration in quadrature digital radio frequency memory(DRFM). Single channel DRFM have good reproducibility after storing a single signal. However, when reproduced after storing multiple signals, the spurious signal is large. The quadrature DRFM consists of I and Q channels, which can greatly reduce the spurious signal. The amplitude of the spurious signal depends on the number of bits of data stored in the DRFM. In this paper, we have obtained the number of bits of signal regeneration according to the application of radio frequency memory by obtaining the size of the spurious signal according to the number of bits of the stored data of the DRFM for multiple signals. As a result of this study, 4 bits quadrature DRFM can achieve a spurious output of less than -20dB, which is used for 4 signals. Those are expected to greatly contribute to the signal analysis of electronic warfare equipment and the development of jamming device.

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Fig. 1. Block Diagram of one Channel DRFM

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Fig. 2. Block Diagram of Quadrature DRFM

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Fig. 3. Spectrum of Quadrature DRFM (signal=1, bits=1)

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Fig. 4. Spectrum of Quadrature DRFM (signal=2, bits=1)

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Fig.5. Spectrum of Quadrature DRFM (signal=3, bits=1)

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Fig. 6. Spectrum of Quadrature DRFM (signal=4, bits=1)

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Fig. 7. Spectrum of Quadrature DRFM (signal=4, bits=3)

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Fig. 8. Spectrum of Quadrature DRFM (signal=4, bits=4)

Acknowledgement

Supported by : Baekseok University

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