Prewhitening Followed by Sampling Versus Sampling Followed by Prewhitening for Detection
Autor: | Kaushallya Adhikari, Steven Kay, Russell Costa |
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Jazyk: | angličtina |
Rok vydání: | 2024 |
Předmět: | |
Zdroj: | IEEE Access, Vol 12, Pp 179478-179487 (2024) |
Druh dokumentu: | article |
ISSN: | 2169-3536 |
DOI: | 10.1109/ACCESS.2024.3505601 |
Popis: | The detection of known signals in colored Gaussian noise typically involves applying a matched filter to prewhitened data samples in the discrete-time domain. This is achieved by sampling the continuous-time data and applying a prewhitener before applying a matched filter. An alternative approach switches the order of sampling and whitening; whitens the data using an analog prewhitener before sampling. These two methods have been widely regarded as equivalent when sampling at the Nyquist or a higher rate. In this study, we demonstrate that these approaches are indeed equivalent when all Nyquist or higher rate samples are utilized. However, when performing detection using only a subset of the Nyquist samples, the equivalence breaks down. We show that for sparse signal detection, these approaches diverge; the implementation utilizing an analog prewhitener followed by a sampler is both computationally feasible and superior in terms of detection performance. |
Databáze: | Directory of Open Access Journals |
Externí odkaz: |
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