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Hybrid FSK-FDM Scheme for Data Rate Enhancement in Dual-Function Radar and Communication.

Muhammad Fahad Munir1, Abdul Basit1, Wasim Khan1

  • 1Department of Electrical & Computer Engineering, International Islamic University, Islamabad 44000, Pakistan.

Sensors (Basel, Switzerland)
|July 8, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a hybrid Frequency Shift Keying and Frequency Division Multiplexing (FSK-FDM) method for dual-function radar and communication (DFRC) systems. This novel approach doubles the communication data rate, improving bit rates and error rates for receivers in any radar region.

Keywords:
DFRC information embeddingDFRC waveform designFSK–FDM DFRCfrequency diversityfrequency division multiplexingjoint waveform and frequencyspectrum sharing DFRCwaveform diversity

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Wireless Communication

Background:

  • Existing dual-function radar and communication (DFRC) systems often use Amplitude Modulation (AM) or Phase Modulation (PM) for data embedding.
  • These traditional methods typically achieve a two-bit transmission per pulse repetition interval (PRI).
  • AM is suitable for receivers in the side lobe region, while PM performs better in the main lobe region.

Purpose of the Study:

  • To propose a novel hybrid Frequency Shift Keying and Frequency Division Multiplexing (FSK-FDM) technique for DFRC.
  • To significantly enhance the communication data rate beyond existing methods.
  • To ensure improved performance regardless of receiver location within the radar's main or side lobe regions.

Main Methods:

  • Information is encoded using Frequency Shift Keying (FSK) modulation based on transmitted waveforms and frequencies.
  • Multiple FSK-modulated symbols are combined using Frequency Division Multiplexing (FDM).
  • This hybrid FSK-FDM approach creates composite symbols, effectively doubling the data rate.

Main Results:

  • The proposed FSK-FDM technique successfully doubles the communication data rate in DFRC systems.
  • It achieves improved bit rate (BR) and bit error rate (BER) performance.
  • The method demonstrates effectiveness for receivers located in both main lobe and side lobe regions of the radar.

Conclusions:

  • The hybrid FSK-FDM approach offers a superior method for information embedding in DFRC.
  • It provides a significant increase in data transmission efficiency for wireless communication.
  • Simulation results validate the effectiveness and advantages of the proposed technique.