Performance of the 19-GHz high-speed wireless LAN system

摘要

This paper describes a new high-speed wireless LAN system in then19-GHz band. This system features a maximum throughput of 15.2 Mbit/s,nwhich is faster than Ethernet's. To achieve high speed wireless datantransmission, we propose the new global scheduling multiple accessn(GSMA). This system consists of a control module (CM) and some usernmodules (UMS). One CM can communicate with up to ten UMs. This GSMA, innwhich all data transmission is managed in the CM, has both short-lengthnand long-length frames, and concatenates multiple packets, so that itnperforms well with light traffic and heavy traffic: with minimal delay.nFor high-speed transmission and easy construction, DQPSK/differentialndetection is used as a modulation/demodulation scheme, and both FEC andnARQ are adopted as the error control method. In addition, as ancountermeasure to shadowing and multipath fading, the CM has an omnibeamnantenna, and each UM uses a 12-sector antenna, and sector selectionndiversity is carried out at the UM. This wireless LAN system is based onnthe RCR STD-34A Japanese radio system standard