Terminal device and communication system

Abstract

Embodiments of the present disclosure relate to a terminal device (200) and a communication system (900) comprising at least one terminal device (902). The terminal device (200) comprises first circuitry (214) coupled to an antenna (202) and configured for a binary phase shift keying (BPSK) modulation based on a dual frequency signal received via the antenna. A first frequency part (204) of the dual frequency signal matches the antenna resonance frequency and is used for charging an energy storage, and a second frequency part (206) of the dual frequency signal is used for performing the BPSK modulation at a mismatched frequency of an antenna impedance. The terminal device (200) also comprises second circuitry (212) coupled to the first circuitry and configured to control a state of the first circuitry for performing the BPSK modulation. The terminal device can support BPSK backscatter with low complexity, cost, and a small size.

Dependencies are inferred from the claim text.