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A new cross-layer design taking advantage of OFDMA in ad hoc networks is presented. OFDMA technology is exploited at the physical layer to improve data rate through multiuser diversity and to enhance network throughput by enabling multiple concurrent transmissions over orthogonal subchannels, each consisting of a group of tones. A new tone-assignment algorithm is presented that takes advantage of...
Multiuser Diversity Medium Access or MDMA is a new cross-layer channel allocation scheme that exploits channel fading diversity and attains concurrency utilizing OFDMA in single-radio ad hoc networks. Channel throughput is enhanced by enabling concurrent transmissions from multiple nodes to the same receiver or from a single transmitter to multiple receivers over orthogonal Subchannels. Also, concurrency...
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