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Next generation wireless systems have to be able to efficiently deal with fast fading environments in order to achieve high spectral efficiency. Using multiple-input multiple-output (MIMO) systems and exploiting receive diversity, the spectral efficiency can be greatly increased. Commonly, the channel is estimated via training symbols, before data detection is carried out based on the obtained channel...
Bit interleaved coded modulation (BICM) because of its improved diversity over fast fading channels is an attractive transmission scheme for future wireless systems. For coded BICM systems, receivers need to employ max log MAP demodulators (demappers) that calculate soft-decision metrics i.e. log-likelihood ratios (LLRs) for the decoder. The complexity of the calculation of these LLRs is exponential...
In multiuser MIMO-BC (Multiple-Input Multiple-Output Broadcasting) systems, user selection is important to achieve multiuser diversity. The optimal user selection algorithm is to try all the combinations of users to find the user group that can achieve the multiuser diversity. However, the calculation amount of the optimal algorithm is too large to implement. Thus, instead of the optimal algorithm,...
Coordinated multiple point transmission/reception (CoMP) has been investigated recently as a promising technology to fulfill the requirements of LTE-Advanced. This paper proposes a downlink coordination scheme applied in the CoMP cooperating set to provide best groups of CoMP transmission points and scheduled users for multi-user multi-input multi-output (MU-MIMO) operation with partial channel state...
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