Spectrum Occupancy Prediction Exploiting Time and Frequency Correlations Through 2D-LSTM
91st IEEE Vehicular Technology Conference, VTC Spring 2020, Antwerp, Belçika, 25 - 28 Mayıs 2020, cilt.2020-May, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 2020-May
- Doi Numarası: 10.1109/vtc2020-spring48590.2020.9129001
- Basıldığı Şehir: Antwerp
- Basıldığı Ülke: Belçika
- Anahtar Kelimeler: Deep learning, frequency correlation, real-world spectrum measurement, spectrum occupancy prediction
- İstanbul Medipol Üniversitesi Adresli: Evet
Özet
The identification of spectrum opportunities is a pivotal requirement for efficient spectrum utilization in cognitive radio systems. Spectrum prediction offers a convenient means for revealing such opportunities based on the previously obtained occupancies. As spectrum occupancy states are correlated over time, spectrum prediction is often cast as a predictable time-series process using classical or deep learning-based models. However, this variety of methods exploits time-domain correlation and overlooks the existing correlation over frequency. In this paper, differently from previous works, we investigate a more realistic scenario by exploiting correlation over time and frequency through a 2D-long short-term memory (LSTM) model. Extensive experimental results show a performance improvement over conventional spectrum prediction methods in terms of accuracy and computational complexity. These observations are validated over the real-world spectrum measurements, assuming a frequency range between 832-862 MHz where most of the telecom operators in Turkey have private uplink bands.