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| 直交周波数分割多重 (OFDM)× | ゼロフォーシング（ZF）および最小二乗誤差（MMSE）等化× | |
|---|---|---|
| 分野 | 通信工学 | 通信工学 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1971 | 1974 |
| 提唱者≠ | Weinstein and Ebert | Saleh Mansour and Paul Zervos |
| 種類≠ | multicarrier modulation scheme | linear equalization algorithm |
| 原典≠ | Weinstein, S. B., & Ebert, P. M. (1971). Data transmission by frequency-division multiplexing using the discrete Fourier transform. IEEE Transactions on Communication Technology, 19(5), 628-634. DOI ↗ | Proakis, J. G. (2001). Digital Communications (4th ed.). McGraw-Hill. link ↗ |
| 別名≠ | multicarrier modulation | channel equalization, interference cancellation |
| 関連 | 5 | 5 |
| 概要≠ | OFDM is a multicarrier modulation technique that divides a wideband channel into many narrowband orthogonal subcarriers. Introduced by Weinstein and Ebert in 1971, it exploits the duality between time and frequency domains to efficiently use spectrum while mitigating intersymbol interference in frequency-selective channels. OFDM is now the standard for high-speed wireless systems including WiFi, cellular LTE, and digital broadcasting. | 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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