Receiver architecture for high-speed wireless LAN protocols

Random access protocols are best suited for an ad-hoc wireless network because they require no central control. Many random access protocols have been proposed for such networks and all of them are based on collision avoidance principles and are designed for low data rates (/spl les/2 Mbps). These protocols are very inefficient at high data rates and small packet sizes where transceiver turnaround times become a large overhead. A feedback channel from the source to the destination enables the design of efficient random access protocols which are rate scalable. Two transceivers (one for the data channel and the second for the feedback channel) are required to enable a feedback channel. This paper proposes a novel receiver architecture which allows the overlay of the feedback channel and data channel in the same spectrum. The design challenges and solutions for building such a receiver are discussed. A MATLAB simulation is used to test the feasibility of the proposed receiver.