Backward Compatible Low PAPR Preamble for Very High Throughput WLAN IEEE802.11ac

Abstract

The new comer WLAN IEEE 802.11ac offers very high throughput wireless communication. By setting the modulation coding scheme to 9 in 80MHz of bandwidth and four spatial streams, it provides data rate up to 1.7Gbps. Operated in the 5GHz frequency band, it should be backward compatible to the former WLANs IEEE 802.11a/n. This paper presents the examination of backward compatibility performance of our novel low PAPR preamble proposed for IEEE802.11ac. Run test under channel model B and D of IEEE802.11TGn proved that the proposed low PAPR preamble in 80MHz can be decoded excellently by IEEE802.11n 20MHz and 40MHz, regardless the location and correlation method. These results demonstrated backward compatibility and coexistence of those WLANs in 5 GHz band.