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The rate for any given user can be computed from this using the multiple access rates as given in Section 5.
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When using the multiple-access channel (MAC) phase of the schemes proposed in [11], one creates a virtual-MIMO uplink with three streams (one from each terminal to the relay), where the relay receives the incoming symbols from the three terminals using three antennas.
We consider an uplink (reverse link) scenario but the results can be generalized to a downlink (forward link) scenario in a straightforward manner using the multiple-access broadcast duality of the Gaussian channel [16] and the fact that scheduling decisions decouple in the many-user limit.
Although Alamouti STBC was used for transmission during the broadcast (BC) phase from the relay to the terminal nodes, only a single antenna was used for the multiple access (MA) phase for the inverse links from the two terminal nodes to the relay.
We analyse the ML detector for use in the multiple access scenario.
In our study, we propose to use TDMA for the multiple access mechanism.
A Gaussian approximation based on the single-user results is used to derive the multiple access capacity.
Frequency diversity inherent in the MC system is exploited through maximal ratio combining, and an adaptive least mean square algorithm is used to estimate the multiple access interference.
The IEEE 802.11a/b-based WLAN uses CSMA/CA mechanism for the multiple access control.
(2) We first use the PS as the multiple access scheme to support multi user wireless communication in LOS environment.
In the derivation of the bit error probability over Nakagami fading channels, we use the exact statistics of the multiple access interference (MAI) in FHSS systems.
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