Energy efficient time-modulated OFDM directional modulation transmitters

Jiayu Hou, Jayakrishnan Methapettyparambu Purushothama, Haijun Fan, Chaoyun Song, Yuan Ding*, Mathini Sellathurai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
37 Downloads (Pure)


In this study, a reconfigurable power divider (RPD) enabled energy efficient direction modulation (DM) transmitter for orthogonal frequency division multiplexing (OFDM) modulated data transmission is proposed. The RPD can smartly select the output ports and operate as a power divider or a switch with appropriate control conditions. Hence, the RPD is able to recycle the energy in the ‘OFF’ state antennas, which is otherwise wasted in the conventional DM transmitter constructed using a fixed power divider and switches. It has been shown in a 4-element array example that the newly proposed RPD-based OFDM DM transmitter can provide 1.5–7.8 dB SNR gains (or in the other way, reducing power consumption by 1.5–7.8 dB) for different excitation strategies.
Original languageEnglish
Pages (from-to)5-13
Number of pages9
JournalMicrowave and Optical Technology Letters
Issue number1
Early online date27 Aug 2022
Publication statusPublished - Jan 2023


  • direction modulation (DM)
  • energy efficient
  • orthogonal frequency division multiplexing (OFDM)
  • reconfigurable power divider (RPD)
  • time modulated array (TMA)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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