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Sparse code multiple access (SCMA) is a new non-orthogonal multiple-access technique in future wireless networks. In SCMA uplink burst transmission, user detection and channel estimation require significant pilot overhead. Dispersive channels with relative small coherent frequency / time, as well as fading diversity techniques, both lead to a result that multiple fading blocks are taken during one...
Sparse code multiple access (SCMA), as a new non-orthogonal multiple-access technique, is capable to achieve massive connectivity and grant-free transmission in wireless radio access. In order to support decoding of signal from simultaneous accessing users, active users detection and channel estimation is needed, which requires significant pilot overhead, especially in channels with relative small...
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