MIMO with More Users than RF Chains.
作者： Henk Wymeersch , Erik G. Larsson , Nil Garcia
DOI:
关键词: Symbol rate 、 Electronic engineering 、 3G MIMO 、 Multi-user MIMO 、 Precoding 、 Computer science 、 Antenna (radio) 、 Basis (linear algebra) 、 MIMO 、 Signal processing
摘要: Antenna arrays with hybrid analog-digital signal processing capabilities offer a compromise between the performance of digital and cost-efficiency analog single radio-frequency (RF) chain. A limitation is that number independent streams they can transmit standard precoding techniques cannot be larger than RF chains. In precoding, precoder (phase shifters or switches) are fixed at beginning streams. To break ceiling on streams, new paradigm proposed, where changed in symbol-by-symbol basis. Algorithms for optimizing precoders symbol rate provided their extensively analyzed.
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