FREQUENCY SPECTRUM MEASUREMENT AND OCCUPANCY ANALYSIS

Dynamic Spectrum Access (DSA) offers capabilities for sensing and dynamic reconfiguration that optimize the use of white spectrum holes. Effective spectrum sensing techniques are critical on the way to systems that use idle spectrum bands in an opportunistic way and improve overall spectral quality. In this paper we report on a large-scale measurement campaign in Pune, India. A high dynamic range spectrum measurement, data storage and the measurement of spectrum occupancy in all bands from 700 MHz to 2,700 MHz were included in the Pune mission. These observations were conducted over a span of two days. While these studies are important in deciding the bands have low usage and developing an algorithm for new spectrum strategy such as Cognitive radio network. Occupancy is assessed as the quantity of spectrum detected above a certain received power threshold. The threshold determination is based on the signal-to-noise ratio, which determines the particular threshold for the different bands used. The findings of this study indicated that this spectrum survey review is preliminary in nature, and potential long-term research needs to be conducted in order to determine any possible secondary use of these non-active channels. GSM 900 spectrum band occupancy is 26.7485%, which is highest form other bands are used.

Key Words:  Spectrum Sensing, spectrum occupancy, SNR threshold, Dynamic threshold, Noise estimation.