Polarization Shift Keying Modulation for Backscatter Communications

Backscatter communication (BackCom) is a promising technology that enables ultra-low-power wireless communication by reflecting RF signals. We propose novel Binary polarization Shift Keying (BPolSK) and Differential polarization Shift Keying (DPolSK) in Bistatic BackCom. Here, the backscatter tag modulates the information by changing the polarization state of the incident RF carrier. We derive the closed-form expression for Bit Error Rate (BER) and analyze the performance of BPolSK and DPolSK. Our results compare the performance of BPolSK and DPolSK and verify that they can achieve low BER, demonstrating their reliability for BackCom applications.