Reduction of SFD bits of WiFi OFDM frame using wobbulation echo signal and barker code

Abstract

The physical layer frame structure of WiFi OFDM is consisting of different fields such as preamble, SFD, length, PSDU. Basically here, an attempt is made for mapping the WiFi OFDM with zigbee which is completed field wise and to reduce the number of bits of WiFi OFDM frame as per the zigbee frame structure. This can be done on the basis of implementing the WiFi OFDM in zigbee without changing the physical layer frame structure of zigbee. But as known, standards can not change for this purpose; the try is made by reducing the number of bits required for start of frame delimiter (SFD) in WiFi as per the necessity of zigbee. Due to which the space for WiFi implementation is produced. The purpose behind this is the range and power of WiFi is to be applied in zigbee and increased data rate. In future, with respect to this the entire frame of WiFi OFDM can be executed in zigbee. In this paper, two techniques are proposed barker code technique and wobbulation technique. These techniques are evaluated and their performances are compared with presence of these two symbols and without the symbols in WiFi frame structure.