Inventors:
Michael L. Trompower - Navarre OH, US
Assignee:
Symbol Technologies, Inc. - Holtsville NY
International Classification:
H04B 1/04
Abstract:
A system and method is provided for adjusting transmission power of different portions of a data packet. The system and method is especially useful when utilizing the IEEE 802. 11 standard protocol due to the varying transmission data rates of a packet. A IEEE 802. 11 packet includes a preamble portion, a header portion and a data portion. The preamble portion has a data rate of 1 Mbps, the header has a data rate of 1 or 2 Mbps and the data portion has a data rate of 1, 2, 5. 5 or 11 Mbps. At a given fixed power level, a transmission at a higher data rate has a lower transmission range than a transmission at a lower data rate. Therefore, the present invention provides for a system and method that adjusts the power level of different portions of a data packet, so that the entire data packet has a more uniform range. This eliminates the need for components in the system receiving a preamble portion of a transmission at higher ranges to remain idle during transmission of an entire frame. The system and method can be applied to both access points and mobile units in a cellular communications system.