High throughput constant envelope pre-coder for massive MIMO systems
Prabhu H, Rusek F, Rodrigues JN, Edfors O (2015)
Publication Type: Conference contribution
Publication year: 2015
Journal
Publisher: Institute of Electrical and Electronics Engineers Inc.
Book Volume: 2015-July
Pages Range: 1502-1505
Conference Proceedings Title: Proceedings - IEEE International Symposium on Circuits and Systems
Event location: Lisbon, PRT
ISBN: 9781479983919
DOI: 10.1109/ISCAS.2015.7168930
Abstract
This study describes a high throughput constant envelope (CE) pre-coder for Massive MIMO systems. A large number of antennas (M), in the order of 100s, serve a relatively small number of users (K) simultaneously. The stringent amplitude constraint (only phase changes) in the CE scheme is motivated by the use of highly power-efficient non-linear RF power amplifiers. We propose a scheme that computes the CE signals to be transmitted based on box-constrained regression (coordinate-descent), with an O(2MK) complexity per iteration per user symbol. A highly scalable systolic architecture is implemented, where M Processing Elements (PEs) perform the pre-coding for a system with up to K=16 users. This systolic architecture results in a very high throughput of 500 Msamples/sec (at 500 MHz clock rate) with a gate count of 14K per PE in 65nm technology.
Involved external institutions
Sweden (SE)How to cite
APA:
Prabhu, H., Rusek, F., Rodrigues, J.N., & Edfors, O. (2015). High throughput constant envelope pre-coder for massive MIMO systems. In Proceedings - IEEE International Symposium on Circuits and Systems (pp. 1502-1505). Lisbon, PRT: Institute of Electrical and Electronics Engineers Inc..
MLA:
Prabhu, Hemanth, et al. "High throughput constant envelope pre-coder for massive MIMO systems." Proceedings of the IEEE International Symposium on Circuits and Systems, ISCAS 2015, Lisbon, PRT Institute of Electrical and Electronics Engineers Inc., 2015. 1502-1505.
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