Methods and systems for reducing papr of an ofdm signal

H - Electricity – 04 – L

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H04L 27/26 (2006.01)

Patent

CA 2728904

Certain embodiments of the present disclosure provide a method and an apparatus for peak-to-average power ratio (PAPR) reduction of a transmission signal in a single carrier frequency division multiple access (SC-FDMA) system. The method may utilize a permutation of a time domain signal, and/or a permutation of a frequency domain signal or a permutation of a signal transformed by a unitary matrix. The apparatus may include an M-point DFT or some other MxM unitary matrix, N-point IDFT, interpolation and frequency conversion units, and a pair of possibly different permutation matrices of size MxM, where M can be less or equal than N.

Certains modes de réalisation de la présente invention portent sur un procédé et un appareil de réduction du rapport puissance crête sur puissance moyenne (PAPR) d'un signal de transmission dans un système d'accès multiple par répartition en fréquence monoporteuse (SC-FDMA). Le procédé peut utiliser une permutation d'un signal du domaine temporel, et/ou une permutation d'un signal du domaine fréquentiel ou une permutation d'un signal transformé par une matrice unitaire. L'appareil peut comprendre une unité de transformation de Fourier discrète (DFT) à M points ou autre matrice unitaire MxM, une unité de transformation de Fourier discrète inverse (IDFT) à N points, des unités d'interpolation et de conversion de fréquence, et une paire de matrices de permutation possiblement différentes de taille MxM, M pouvant être inférieur ou égal à N.

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