However, facing the increasingly complex electromagnetic environment, most existing methods have poor performance to identify different modulation types in low signal-to-noise ratio (SNR). This paper proposes an automatic recognition method for different LPI radar signal modulations. Firstly, time-domain ...
The CW could be, for example, the mark tone of an FSK signal. As the level of the CW relative to noise is increased, from a signal-to-noise ratio of minus infinity dB, the Rayleigh distribution starts to change. Very low values become less and less likely, whilst as the SNR becomes...
Visible-light communication (VLC) based on white light-emitting diodes has recently attracted much attention to provide high-bitrate data communication inindoor environments. One of the remaining challenges to be resolved to enable the proliferation ofVLC systemsis related to channel attenuation and mult...
in signal-to-noise ratio (SNR) scalability, where a BL picture may have substantially the same resolution as an EL picture but with lower quality, one or more of the above-described three stages (e.g., all the stages) may not
aSchematic illustration of the transition from a closed-shell state to an open-shell state as the energy gap between the singlet state and the triplet state decreases.bResonance structures and the amphoteric redox behaviors of P(TII-Ar), which could encompass both aromatic type (closed-shell) ...
We noticed that Kakumani et al., [96] denoised DNA signal using digital signal processing approach to maximize signal to noise ratio (SNR). The presence of the exonic region in DNA strands had been detected by the employment of some least square optimization criteria. The DNA sequence was ...
The above methods achieve automatic recognition of LPI radar signals at a high SNR. However, due to the characteristics of low power and large bandwidth, LPI radar signals are susceptible to noise interference, which poses great challenges to the signal recognition task. It is difficult for the ...