PHY Preamble Format for Wireless Communication System

Abstract

A system and method of extracting data from data packets transmitted over a wireless network includes receiving a data packet having a preamble portion and a payload portion. The preamble portion is cross correlated with a first known spreading sequence to generate a first timing signal and the preamble portion is cross correlated with a second known spreading signal to generate a frame timing signal. An impulse is detected in the first timing signal and a first timing parameter is set based upon the detected impulse in the first timing signal. An impulse is detected in the frame timing signal and a frame timing parameter is set based upon the detected impulse in the frame timing signal. Data is extracted from the received payload portion according to the first timing parameter and the frame timing parameter.

It is claimed: 
     
         1 . A method of extracting data from data packets transmitted over a wireless network, comprising:
 receiving a data packet, the data packet having a preamble portion and a payload portion;   cross correlating the preamble portion with a first known spreading sequence to generate a first timing signal;   cross correlating the preamble portion with a second known spreading signal to generate a frame timing signal;   detecting an impulse in the first timing signal;   setting a first timing parameter based upon the detected impulse in the first timing signal;   detecting an impulse in the frame timing signal;   setting a frame timing parameter based upon the detected impulse in the frame timing signal; and   extracting data from the received payload portion according to the set first timing parameter and the set frame timing parameter.