Sedaghat MA, Gäde B, Müller R, Fischer G (2017)
Publication Status: Published
Publication Type: Conference contribution
Publication year: 2017
Pages Range: 1714-1718
A new hybrid Analog-Digital (hybrid A-D) precoder is proposed for multi-antenna base stations in massive Multiple-Input Multiple-Output (MIMO) which allows a trade-off between the number of required RF-chains and the update rate of the analog part. It is shown that the number of RF-chains can be reduced even below the number of eigenmodes of the channel, thereby closing the gap between the standard hybrid A-D and the single-RF MIMO. This is achieved by dividing the input data streams into blocks and jointly optimizing the digital and the analog precoder parts for each block. The analog part of the precoder needs to be updated once per block and remains static over each block interval. Out of band radiation due to switching is resolved by inserting a short guard interval between blocks. It is shown the number of RF-chains can be any arbitrary positive integer to obtain zero distortion at the user terminals if the update rate is high enough. The proposed precoder offers a significant performance gain at the expenses of data dependent precoding and higher update rates of the analog part.
APA:
Sedaghat, M.A., Gäde, B., Müller, R., & Fischer, G. (2017). A Novel Hybrid Analog-Digital Transmitter for Multi-antenna Base Stations. (pp. 1714-1718).
MLA:
Sedaghat, Mohammad Ali, et al. "A Novel Hybrid Analog-Digital Transmitter for Multi-antenna Base Stations." 2017. 1714-1718.
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