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| Model prognozowania strat propagacyjnych Okumura-Hata× | ZF/MMSE Equalization× | |
|---|---|---|
| Dziedzina | Telekomunikacja | Telekomunikacja |
| Rodzina | Process / pipeline | Process / pipeline |
| Rok powstania≠ | 1968 | 1974 |
| Twórca≠ | Masahiro Okumura and Masahiro Hata | Saleh Mansour and Paul Zervos |
| Typ≠ | empirical path loss model | linear equalization algorithm |
| Źródło pierwotne≠ | Okumura, Y., Ohmori, E., Kawano, T., & Fukuda, K. (1968). Field strength and its variability in VHF and UHF land mobile radio service. Review of the Electrical Communication Laboratory, 16(9-10), 825-873. link ↗ | Proakis, J. G. (2001). Digital Communications (4th ed.). McGraw-Hill. link ↗ |
| Inne nazwy | path loss model, propagation prediction | channel equalization, interference cancellation |
| Pokrewne≠ | 4 | 5 |
| Podsumowanie≠ | The Okumura-Hata model is an empirical propagation model for predicting path loss in mobile radio systems. Developed by Okumura (1968) and mathematically formalized by Hata (1980), it is one of the most widely used models for cellular network planning. The model predicts median path loss as a function of frequency, distance, and antenna heights, with environment-specific correction factors. Despite its age, the Okumura-Hata model remains a standard in 2G/3G planning and is often used as a baseline for more sophisticated models. | Zero-Forcing (ZF) and Minimum Mean-Square Error (MMSE) equalization are fundamental linear receiver algorithms for combating intersymbol interference in dispersive channels. Developed in the context of data transmission theory, these methods form the basis of modern channel equalization in wireless and wired systems. While ZF aggressively cancels interference, MMSE balances interference suppression with noise enhancement, making it the optimal linear solution under Gaussian noise. |
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