In this thesis, we propose and analyze a new wireless MAC protocol based on a novel approach. In this approach, two control tones, called " request pulse " and " receiver busy tone " areemployed to coordinate the use of the wireless medium and to prevent potential collisions. Each tone is sent using a dedicated frequency channel, other than the channel used for data transmission. The request pulse is a very short pulse sent by a transmitter, before it sends data on the data channel, in order to alert neighboring nodes about its forthcoming data transmission. The receiver busy tone is sent by the receiver while it successfully receives data, and is continued for a short while after data reception has been completed. We demonstrate that the proposed scheme is effective in efficiently coping with typical LAroblems such as the hidden node and the exposed node scenarios. As a further enhancement to the scheme, we have come up with another novel idea: we adopt multiple distinguishable pulse shapes to be used as request pulse by different nodes, thereby further reducing the probability of collision between data packets and increasing the achievable LAN throughput. Using analysis, we study the performance of our protocol under some typical scenarios and determine the relationship between collision probability, delay, and throughput with network load and propagation time. We show that the proposed scheme overcomes some of the deficiencies of the current wireless LAN protocols.