Patent ID: 6310865
Filing Date: 2001-10-30
Classification: H04W,Y02D

Abstract:
A high-speed wireless access device comprising:a first wireless modem in a base station and a second wireless modem in a mobile terminal,wherein said first wireless modem in a base station includes,a low-speed modulation means;a first high-speed modulation/demodulation means with a first equalizer built-in;a low-speed packet adding means for adding a low-speed packet by said low-speed modulation means to the-beginning of a high-speed packet;an information adding means for adding information to said low-speed packet in order to inform a terminal to which terminal a packet is transmitted; anda transmission means for transmitting a packet addressed to a mobile terminal by switching to a high-speed mode immediately after adding said low-speed packet,and said second wireless modem in a mobile terminal includes,a low-speed demodulation means;a second high-speed modulation/demodulation means with a second equalizer built-in;a switching means for switching from said low-speed demodulation means to said second high-speed modulation/demodulation means and vice-versa;an analyzing means for analyzing data received by said low-speed demodulation means;a means for turning off said low-speed demodulation means and for turning on said second high-speed modulation/demodulation means when a packet addressed to said mobile terminal is recognized;a means for turning off said second high-speed modulation/demodulation means after receiving said packet addressed to said mobile terminal;an AGC information holding means for holding AGC information in a low-speed receiving mode and for making use of said AGC information in a high-speed receiving mode; anda timing extraction information holding means for holding timing extraction information in said low-speed receiving mode and for making use of said timing information in said high-speed receiving mode.