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An overview of uplink multiple access transmission schemes in support of CA is provided in [18].
As expected, multiple access transmission brings a diversity order of 2 in Figure 4 and 3 in Figure 5.
We also evaluated the performance of IA from bit error ratio measurement-based results in comparison to different time-division multiple access transmission schemes.
The performance of IA in terms of bit error rate measurement-based results was also compared to different time-division multiple access transmission schemes, including single- and multiple antenna systems transmitting over the dominant mode of the MIMO channel.
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The multiplexed signal is then sent into a multiple-access transmission channel.
a It should be noted that our many-to-many space-time network coding scheme is a CDMA-like system that operates under conventional TDMA by assigning each network node a signature waveform for single- or multiple-access transmission.
The main novelty is that a new cooperative multiple-access transmission protocol has been designed by carefully applying these low-cost tools (zero-forcing detection, antenna selection, superposition coding, repetition-coded decode-and-forward, etc).
In conventional TDMA-based cooperative communications (i.e., without network coding and multiple-access transmissions), a total of N2 time slots is required to achieve full diversity.
The third generation mobile radio system uses a code division multiple access (CDMA) transmission scheme and has been extensively adopted worldwide.
Several research works have addressed the cross-tier interference problem in two-tier HetNets based on orthogonal frequency division multiple access (OFDMA) transmission.
In this article, we develop a new subspace-based multiuser joint carrier frequency offset (CFO) and direction-of-arrival (DOA) estimation scheme for orthogonal frequency division multiple access uplink transmissions.
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