Communication channel assessment: detection of ultra wideband signals using a channelized receiver

Spectral sensing ultra wideband signals using a down-converting channelized receiver

“…The impulse-like UWB signal model is unchanged from [5] and is reintroduced here for completeness. The general analytic expression for the UWB signal is given by…”

“…This was the initial approach used by the authors in [5]. As highlighted during formal presentation, this particular architecture is practically limited by available A/D converter technology, i.e., the combination of required Nyquist sampling frequency, as dictated by the highest spectral component in W Tot , and required quantization error (noise), as dictated by the number of bits generated, effectively render the original architecture in [5] impractical for nearterm applications.…”

“…To exploit potential temporal and spectral differences, the detection processes of [5] are reintroduced in Fig. 2.…”

“…This may become even more apparent as spectral sharing and waveform coexistence escalates [1,2]. This work addresses spectral sensing by revisiting communication channel assessment in light of previous channelized receiver work involving both cooperative [3] and non-cooperative signal detection [4,5]. As in these previous works, the goal is to determine signal presence (detection) and/or to perform characterization given total received bandwidth W Tot .…”

“…This signal is introduced into a down-converting channelized receiver and detection performance is characterized using four different data processing techniques, including two temporal-based and two spectral-based. The fundamental approach involves extending previous results of [5] by incorporating downconversion and filtering prior to analog-to-digital (A/D) conversion. The goal is to produce reliable results which may applicable to future systems employing available A/D conversion technology.…”