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In Orthogonal Frequency Division Multiple Access (OFDMA), there are multiple sub-channels which enable multiple stations to transmit concurrently on different sub-channels. The stations can obtain the channel information of all the sub-channels at each time instant. Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) allows different stations to randomly contend for the available subchannels...
In WLAN systems, the difference in propagation delay among stations (STAs) can exceed the predefined cyclic prefix length, leading to multiple access interference (MAI). To solve this MAI problem, it is necessary to use a longer cyclic prefix length for orthogonality between different subchannels; however, this sacrifices system efficiency due to the cyclic prefix overhead. In this paper, we propose...
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