Efficient Rate Splitting Method Using Successive Beamforming Techniques
| Autor: | Christoph Kaulich, Wolfgang Utschick, Michael Joham |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Beamforming
Minimum mean square error Optimization problem Computer science Quality of service 010401 analytical chemistry MIMO 020206 networking & telecommunications 02 engineering and technology 01 natural sciences 0104 chemical sciences Power (physics) Constraint (information theory) 0202 electrical engineering electronic engineering information engineering Algorithm Computer Science::Information Theory |
| Zdroj: | PIMRC |
| Popis: | It has been shown that rate splitting multiple access (RSMA) promises high data rates in the multi-user multiple-input single-output broadcast channel (MISO BC) with superior performance under imperfect channel state information (CSI) and the possibility to fulfill various quality of service (QoS) constraints. In this work, we use the 1-layer RS approach for the sum rate maximization under a total power constraint in the multi-user multiple-input multiple-output broadcast channel (MIMO BC). We adapt the iterative weighted minimum mean squared error (WMMSE) approach to the MIMO BC. However, we propose an efficient approach that splits the optimization problem into a "private" part based on the previously proposed linear successive allocation (LISA) method, a "common" part carried out by an iteratively SINR maximizing method, and a power allocation part using the waterfilling algorithm. Numerical simulations show performance gains in the medium and high SNR region when applying the proposed method. |
| Databáze: | OpenAIRE |
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