Towards Spectrum Sensing Within 6th Generation Mobile Communications in the Sub-6 GHz Frequency Range Using Wideband Direct Sampling Architectures

Within this work, a pre-processing system for spectrum sensing is demonstrated. A full hardware-software codesign implementation is demonstrated. Spectral analysis patterns are generated, various transmission properties are evaluated. Furthermore, signal degradation effects caused by ADC and DAC artifacts are discussed. Even within a a loopback system from DAC to ADC a power spectral density difference of 2.2 dB can be observed within the usable transmission band, with even higher disruptions around the Nyquist limits. Ultimately, mitigation strategies for these signal impairments are discussed.