Apparatus and method for dynamic frequency selection in ofdm...

H - Electricity – 04 – W

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H04W 16/10 (2009.01) H04W 84/04 (2009.01) H04W 88/08 (2009.01) H04J 11/00 (2006.01)

Patent

CA 2627437

A wireless endpoint is a Wireless Regional Area Network (WRAN) endpoint, such as a base station (BS) or customer premise equipment (CPE). The WRAN endpoint can transmit an orthogonal frequency division multiplexed (OFDM) signal comprising 2048 subcarriers in a channel. The 2048 subcarriers are divided into 16 subcarrier sets, or subchannels, each subcarrier set comprising 128 subcarriers. However, upon detection of an incumbent narrowband signal in the channel, the WRAN endpoint forms the OFDM signal for transmission in such a way that the WRAN endpoint excludes use of those one, or more, of the subcarrier sets that would interfere with the incumbent narrowband signal.

Selon l'invention, un point d'extrémité sans fil est un point d'extrémité d'un réseau régional sans fil (WRAN), par exemple une station de base (BS) ou une installation d'abonné (CPE). Le point d'extrémité du WRAN peut transmettre un signal à multiplexage par répartition orthogonale de la fréquence (OFDM) comprenant 2048 sous-porteuses dans un canal qui sont réparties en 16 ensembles de sous-porteuses, ou sous-canaux, chaque ensemble comprenant 128 sous-porteuses. Cependant, dès la détection dans le canal d'un signal à bande étroite titulaire, le point d'extrémité du WRAN forme le signal OFDM pour émission de manière que le point d'extrémité du WRAN exclut l'utilisation d'un ou de plusieurs ensembles de sous-porteuses susceptibles de perturber le signal à bande étroite titulaire.

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