Measuring true signal parameters in digital wireless systems in the presence of in-channel interference

A new digital signal processing method capable of measuring signals typical parameters, such as channel power, channel bandwidth, and carrier frequency, is presented hereinafter. In particular, thanks to some attractive features of the exploited MUSIC algorithm, the method allows the measurement of typical parameters of wideband signals even though they occupy, fully or partially, the same frequency range of other signals, such as interference or noise. This property is relevant for modern telecommunication systems that do not use an own licensed band, but rather share an unlicensed band with other systems, such in the case of those based on the standard IEEE 802.11x. The performance of the method is assessed by means of a number of experiments involving different kinds of desired and disturbing signal as well as different Signal-Interference to Noise Ratio (SINR) conditions. Obtained results show the satisfying reliability and efficacy of the proposed method, thus suggesting its use in the presence of in-channel interference.