Denoising and Filtering Techniques for Chipless RFID

Summary

This chapter discusses several signal processing methods that are useful in denoising the received backscattered signal. It focuses on denoising signals in chipless RFID systems. The chapter discusses the noise suppression methods in detail. It first explores the noise filtering capabilities of the matrix pencil algorithm. Then, it presents a discussion on the use of the signal space representation for noise filtering. The steps involved in the signal space representation of tag frequency signatures are summarized in the chapter. The application of the selective spectral interrogation (SSI) method for frequency‐domain chipless RFID tag for enhancing signal peaks and suppressing affects of unwanted noise and clutter is also discussed in the chapter. The chapter further describes the use of wavelet‐based signal processing for denoising and improving signal quality.