Dual use dual complex multiplier and complex divider

G - Physics – 06 – F

Patent

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G06F 7/52 (2006.01) G06F 7/48 (2006.01)

Patent

CA 2486811

A circuit performs complex division and dual complex multiplication. The circuit has a plurality of multipliers (20, 22, 24, 26, 38, 44, 56, 58). Each of the plurality of multipliers is used in both the complex division and the dual complex multiplications. The circuit also has a plurality of components (30, 32) capable of adding and subtracting. Each adding and subtracting component is used during the complex division and the dual complex multiplication and switches between operation as an adder and a subtractor between performing the complex division and the dual complex multiplication. Preferred potential uses for the circuit are in a receiver of a user equipment or a base station. The circuit is used in a fast Fourier transform (FFT) based channel estimation or a FFT based data detection.

Un circuit exécute une division complexe et une double multiplication complexe. Le circuit comprend une pluralité de multiplicateurs (20, 22, 24, 26, 38, 44, 56, 58). Chacun des multiplicateurs est utilisé à la fois dans la division complexe et dans les doubles multiplications complexes. Le circuit comprend également une pluralité de composants (30, 32) capables d'additionner et de soustraire. Chaque composant d'addition et de soustraction est utilisé pendant la division complexe et la double multiplication complexe et il permute entre des opérations en tant qu'additionneur et en tant que soustracteur, entre l'exécution de la division complexe et de la double multiplication complexe. Les utilisations potentielles préférées du circuit sont dans un récepteur d'un matériel d'utilisateur ou d'une station de base. Le circuit est utilisé dans une estimation de canal basée sur une transformation de Fourier rapide (TFR) ou une détection de données basée sur TFR.

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