World's first 802.11g in a single chip


World's first 802.11g in a single chip

Atheros Communications has launched what it calls the world's first complete single-chip 802.11g WLAN solution.

The new Atheros AR5005G chip offers a media access controller, base band processor, and a 2.4 GHz radio in an integrated digital CMOS design.   The AR5005G solution is the company's third-generation 802.11g silicon. It was preceded by a three-chip solution launched in February 2003, and a two-chip solution launched in June 2003.

In order to meet the demands of the key portable market, the AR5005G uses a multi-phase approach to signal processing that is claimed to extend the battery life of the mobile device in which the chip is embedded. This is achieved by controlling the power of different sections of the wireless device according to the level of system and network activity. Atheros claims that the power-saving technique allows the chip to consume up to 98% less power than some competing multi-chip WLAN solutions.

The AR5005G supports in hardware the WPA and WPA2 security standard) and 802.11i Enhanced Security using Advanced Encryption Standard (AES). Atheros says that competitive wireless LAN products with firmware encryption can suffer a 20-50% performance reduction when WPA or AES is enabled.

This article was part of Computer Weekly's enterprise mobile business channel, sponsored by Nokia 

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