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High Throughput Constant Envelope Pre-coder for Massive MIMO Systems

Prabhu, Hemanth LU ; Rusek, Fredrik LU ; Rodrigues, Joachim LU and Edfors, Ove LU (2015) IEEE International Symposium on Circuits and Systems (ISCAS), 2015 In [Host publication title missing]
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 (coordinatedescent),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... (More)
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 (coordinatedescent),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 14 K per PE in 65 nm technology. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
in press
subject
keywords
massive mimo, pre-coding, constant envelope, gradient descent
in
[Host publication title missing]
pages
4 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE International Symposium on Circuits and Systems (ISCAS), 2015
project
EIT_DISTRANT Distributed antenna systems for efficient wireless systems
language
English
LU publication?
yes
id
f5b0e4bf-e466-41c5-99a4-7385faa50ecb (old id 5045467)
date added to LUP
2015-02-06 12:37:25
date last changed
2016-04-16 09:57:04
@misc{f5b0e4bf-e466-41c5-99a4-7385faa50ecb,
  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 (coordinatedescent),with an O(2MK) complexity per iteration per user<br/><br>
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 14 K per PE in 65 nm technology.},
  author       = {Prabhu, Hemanth and Rusek, Fredrik and Rodrigues, Joachim and Edfors, Ove},
  keyword      = {massive mimo,pre-coding,constant envelope,gradient descent},
  language     = {eng},
  pages        = {4},
  publisher    = {ARRAY(0x81da700)},
  series       = {[Host publication title missing]},
  title        = {High Throughput Constant Envelope Pre-coder for Massive MIMO Systems},
  year         = {2015},
}