Embedded ranging system in ISM band

Abstract

A new embedded ranging system in the ISM band is described. The proposed indoor ranging system combines the advantages of both broadband and narrowband signals to achieve high ranging accuracy in the presence of strong multipath reflections to achieve a good link budget and to be compliant with spectral regulations. The system is based on a WLAN transceiver (with embedded ranging specific circuits) and uses the same frequency band for both communication and ranging purposes so that no separate dedicated ranging transceiver is needed. A prototype has been implemented to evaluate the performance of the proposed technique in a realistic environment. Experimental results show ranging accuracies of less than 20 cm.

Image Encryption and Decryption Based on Chaotic Algorithm

“…Chaotic mapping in the application of the block cipher is by using the iterative nature of chaos for rapid scrambling image data [14]. In general, when designing block ciphers, it is mainly to iterate the plaintext information that needs to be ( )…”

Sparse Representation Based Range-Doppler Processing for Integrated OFDM Radar-Communication Networks

“…The concept of the integrated radar-communication system (RadCom) was first proposed in [9]. It was then further characterized by time domain [10][11][12] and code-domain integration in [13][14][15][16][17]. Although these techniques are common in wireless communications, they are not suitable for multiuser radar applications.…”

A novel large input range source-follower based filter architecture

“…So, each sub-block needs to be optimized to get maximum performance out of as little power as possible. A critical building block in high bandwidth appli-cations, such as UWB receivers and ranging receivers [1], is a continuous-time filter. Gm-C topologies are the common approach to realize low-power active filters at these high baseband frequencies and especially source-follower based filters [2] (Fig.…”