Method and apparatus for transmitting uplink fast feedback...

H - Electricity – 04 – L

Patent

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H04L 27/26 (2006.01)

Patent

CA 2566539

An apparatus and method for transmitting uplink fast feedback information using a fast feedback channel in an orthogonal frequency division multiple access (OFDMA) communication system. A channel encoder generates uplink fast feedback information to be transmitted, and outputs codewords designed such that a minimum Hamming distance between the codewords is maximized, according to the uplink fast feedback information. A non-coherent modulator performs orthogonal modulation on transmission symbols corresponding to the codewords and allocates the orthogonal-modulated transmission symbols to subcarrier cluster. An inverse fast Fourier transform (IFFT) block performs IFFT on a transmission signal having the subcarrier cluster and transmits the IFFT- processed transmission signal.

L'invention concerne un appareil et une méthode pour transmettre des informations de rétroaction rapide de liaison montante. Cet appareil et cette méthode font appel à un canal de rétroaction rapide dans un système de communication de multiplexage par répartition orthogonale de la fréquence (MROF). Un codeur de canaux génère des informations de rétroaction rapide de liaison montante à transmettre, et produit des mots de code conçus de sorte qu'une distance de Hamming minimale entre les mots de code soit maximisée, selon les informations de rétroaction rapide de liaison montante. Un modulateur non cohérent effectue une modulation orthogonale sur des symboles de transmission correspondants aux mots de code, et attribue les symboles de transmission modulés de manière orthogonale à une grappe de sous-porteuses. Un bloc de transformée de Fourier rapide inverse (IFFT) effectue une IFFT sur un signal de transmission présentant la grappe de sous-porteuses et transmet le signal de transmission traité par IFFT.

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