Method and system for preserving a frame check sequence during backscatter communication

A backscattering tag including one or more passive circuitry components and coupled to a sensor, the backscattering tag configured to:

• receive, using the one or more passive circuitry components, a transmitted signal including a transmitted data frame from a transmitting unit;
• receive sensor data from the sensor;
• and backscatter, using the one or more passive circuitry components, the transmitted signal to form a backscattered signal including a backscattered data frame that includes encoded sensor data, the backscattered signal receivable at a receiving unit configured to decode the encoded sensor data,
• wherein the transmitted data frame includes a first data sequence and a frame check sequence (FCS), the first data sequence including a transmitted data sequence and a dummy sequence, the FCS being based on a first cyclic redundancy check (CRC) value determined using a given CRC algorithm for the first data sequence, and the FCS being usable by the receiving unit to detect communication errors in the transmitted data frame;
• and
• the backscattered data frame includes a second data sequence and the FCS,
• the second data sequence including the transmitted data sequence, an encoded tag data sequence and a CRC preservation sequence based on a backscattering tag data sequence including the encoded sensor data, a bit-length of the backscattering tag data sequence, and the given CRC algorithm, the CRC preservation sequence preserving the FCS of the transmitted data frame in the backscattered data frame by yielding the first CRC value using the given CRC algorithm for the second data sequence, and the FCS being usable by the receiving unit to detect communication errors in the backscattered data frame.