Application of Digital Beamforming Techniques for Secure Non-Coherent Software Defined Radio (SDR) Communication Links Conference

Sans, AJ, Willis, JM, Rivas-Torres, W et al. (2025). Application of Digital Beamforming Techniques for Secure Non-Coherent Software Defined Radio (SDR) Communication Links . 3316.

cited authors

  • Sans, AJ; Willis, JM; Rivas-Torres, W; Venkatakrishnan, SB; Volakis, JL

abstract

  • An adaptive digital phased array beamforming system operating at 2.4 GHz is presented using a Direct Sequence Spread Spectrum Offset Quadrature Phase Shift Key (DSSS-OQPSK) with Low Probability of Intercept (LPI) of non-coherent signals. The setup consists of two N210 USRP equipped software radios with a total of four receiver channels and one X310 USRP software radio to transmit the DSSS-OQPSK LPI signal using a 2.4 GHz antenna array. The beamforming receiver steers in the direction of the target signal to increase the signal-to-interference-plus-noise ratio (SINR). This SINR increase is due to eliminating sources of interference from other directions. To determine the direction of the incoming signals, a direction of arrival (DoA) algorithm, such as MUSIC (MUltiple SIgnal Classification), is employed for the beamforming operation. Notably, the transmitter is considered to operate dynamically and perform continuous DoA scanning with the goal to isolate and demodulate the signal of interest.

authors

publication date

  • January 1, 2025

start page

  • 3316