Compressive sensing based signal design for multiple access in return channel

2016 ◽  
Author(s):  
Yongjun Deng ◽  
Xuesi Wang ◽  
Jintao Wang
Keyword(s):  
Compressive Sensing ◽  
Multiple Access ◽  
Signal Design ◽  
Return Channel

UWB Positioning Systsem Design: Selection of Modulation and Multiple Access Schemes

2007 ◽  
Vol 61 (1) ◽  
pp. 45-62 ◽  
Author(s):  
Hui Yu ◽  
Enrique Aguado ◽  
Gary Brodin ◽  
John Cooper ◽  
David Walsh ◽  
...  
Keyword(s):  
Multiple Access ◽  
High Performance ◽  
Ultra Wideband ◽  
Good Time ◽  
Modulation Scheme ◽  
Positioning System ◽  
Indoor Environments ◽  
Signal Design ◽  
Positioning Systems ◽  
Design Selection

In densely-populated cities or indoor environments, limited visibility to satellites and severe multipath effects significantly affect the accuracy and reliability of satellite-based positioning systems. To meet the needs of “seamless navigation” in these challenging environments an advanced terrestrial positioning system is under development. This system is based upon Ultra-Wideband (UWB) technology, which is a promising candidate for this application due to good time domain resolution and immunity to multipath. This paper presents a detailed analysis of two key aspects of the UWB signal design that will allow it to be used as the basis of such a high performance positioning system: the modulation scheme and the multiple access technique. These two aspects are evaluated in terms of spectral efficiency and synchronisation performance over multipath channels. Thus this paper identifies optimal modulation and multiple access techniques for a long range, high performance terrestrial positioning system using UWB.

scholarly journals A Survey: Nonorthogonal Multiple Access with Compressed Sensing Multiuser Detection for mMTC

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Mehmood Alam ◽  
Qi Zhang
Keyword(s):  
Compressive Sensing ◽  
Multiuser Detection ◽  
Multiple Access ◽  
Research Work ◽  
Sensor Nodes ◽  
New Paradigm ◽  
Medium Access ◽  
Multiple User ◽  
Radio Resources ◽  
Art Research

One objective of the 5G communication system and beyond is to support massive machine type of communication (mMTC) to propel the fast growth of diverse Internet of Things use cases. The mMTC is aimed at providing connectivity to tens of billions of sensor nodes. The dramatic increase of sensor devices and massive connectivity impose critical challenges for the network to handle the enormous control signaling overhead with limited radio resources. Nonorthogonal multiple access (NOMA) is a new paradigm shift in the design of multiple user detection and multiple access. NOMA with compressive sensing-based multiuser detection is one of the promising candidates to address the challenges of mMTC. The survey article is aimed at providing an overview of the current state-of-art research work in various compressive sensing-based techniques that enable NOMA. We present characteristics of different algorithms and compare their pros and cons, thereby providing useful insights for researchers to make further contributions in NOMA using compressive sensing techniques. Nonorthogonal CDMA massive connectivity grant free medium access compressive sensing multiuser detection

Sparse Signal Aloha: A Compressive Sensing-Based Method for Uncoordinated Multiple Access

2017 ◽  
Vol 21 (6) ◽  
pp. 1301-1304 ◽  
Author(s):  
Liantao Wu ◽  
Peng Sun ◽  
Ming Xiao ◽  
Yuhen Hu ◽  
Zhi Wang
Keyword(s):  
Compressive Sensing ◽  
Multiple Access ◽  
Sparse Signal
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