Interfering signal detection by using Chirp-UWB template waveform

Abstract

This paper discusses an interference detection technique for ultra wideband (UWB) to share the spectrum with other radio system. A detection and avoidance (DAA) technique are required in UWB system from some countries regulations. In most of interference mitigation techniques, it is required to detect existence of interfering signal and its band. However, some band pass filters are needed to detect various interfering bands detected used by the conventional energy detection. In this paper, the correlation detection is applied for the interfering signal detection without band pass filters. In UWB receiver, a chirp-UWB is prepared as a template waveform. The received signal before UWB communication is correlated with the chirp-UWB template waveform, and the signal is integrated. The integral period is decided from sweep function of the chirp-UWB depending on the interfering bands. The sweep function of the Chirp-UWB is also considered to improve the performance. The sine function is adopted for the sweep function. The miss detection error rate (DER) and false alarm rate (FAR) are evaluated to show the effectiveness of proposed interference detection technique.