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Software Defined Radio based MIMO channel sounding

Elofsson, Jens LU and Seimar, Peter (2016) EITM01 20161
Department of Electrical and Information Technology
Abstract
With todays increased use of smartphones and other wireless devices, the demands
on the wireless networks have increased dramatically. This has prompted the re-
search and development of new types of wireless systems using multiple antennas
at both the transmitter and the receiver, known as MIMO. Since wireless systems
are very susceptible to interference and to changes in the environment, it is im-
portant to know how the wireless channel behaves in the environment that the
wireless system is intended to operate in. This is done by sounding the channel,
e.g. where a signal is transmitted from the transmitter and processed on the re-
ceiver in order to obtain the impulse response of the channel. When performing
channel sounding on... (More)
With todays increased use of smartphones and other wireless devices, the demands
on the wireless networks have increased dramatically. This has prompted the re-
search and development of new types of wireless systems using multiple antennas
at both the transmitter and the receiver, known as MIMO. Since wireless systems
are very susceptible to interference and to changes in the environment, it is im-
portant to know how the wireless channel behaves in the environment that the
wireless system is intended to operate in. This is done by sounding the channel,
e.g. where a signal is transmitted from the transmitter and processed on the re-
ceiver in order to obtain the impulse response of the channel. When performing
channel sounding on a MIMO system it is important that the signals transmitted
from the antennas interfere with each other as little as possible so as to get a good
estimation for how the channel behaves. In this thesis we implement a 2 by 2
MIMO channel sounder using m-sequences and Zadoff Chu-sequences, both with
good autocorrelation properties. The major part of the implementation is done
on an FPGA in order to be able to perform the sounding in real time. (Less)
Popular Abstract
In recent years, the use of smart phones, tablets, smart watches and other wireless devices has increased dramatically. The way that mobile devices are used have also changed, from previously being used for only voice calls and text messaging, cell phones are now also used for eg. web browsing and video streaming. This has resulted in that the wireless systems that are used have seen an major increase in both the number of users and the amount of data each device uses. Since older systems, such as GSM or 3G, don't have enough capacity to handle the increase in traffic, newer systems, such as 4G, have taken their place. When developing new wireless systems, it is necessary to know how the transmitted radio waves are impacted by the... (More)
In recent years, the use of smart phones, tablets, smart watches and other wireless devices has increased dramatically. The way that mobile devices are used have also changed, from previously being used for only voice calls and text messaging, cell phones are now also used for eg. web browsing and video streaming. This has resulted in that the wireless systems that are used have seen an major increase in both the number of users and the amount of data each device uses. Since older systems, such as GSM or 3G, don't have enough capacity to handle the increase in traffic, newer systems, such as 4G, have taken their place. When developing new wireless systems, it is necessary to know how the transmitted radio waves are impacted by the environment. This is done using a technique called channel sounding. (Less)
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author
Elofsson, Jens LU and Seimar, Peter
supervisor
organization
course
EITM01 20161
year
type
H2 - Master's Degree (Two Years)
subject
keywords
channel sounding, MIMO, Zadoff Chu, M-sequences, USRP, FPGA
report number
LU/LTH-EIT 2016-502
language
English
id
8874710
date added to LUP
2016-06-07 09:50:06
date last changed
2016-06-07 09:50:06
@misc{8874710,
  abstract     = {With todays increased use of smartphones and other wireless devices, the demands
on the wireless networks have increased dramatically. This has prompted the re-
search and development of new types of wireless systems using multiple antennas
at both the transmitter and the receiver, known as MIMO. Since wireless systems
are very susceptible to interference and to changes in the environment, it is im-
portant to know how the wireless channel behaves in the environment that the
wireless system is intended to operate in. This is done by sounding the channel,
e.g. where a signal is transmitted from the transmitter and processed on the re-
ceiver in order to obtain the impulse response of the channel. When performing
channel sounding on a MIMO system it is important that the signals transmitted
from the antennas interfere with each other as little as possible so as to get a good
estimation for how the channel behaves. In this thesis we implement a 2 by 2
MIMO channel sounder using m-sequences and Zadoff Chu-sequences, both with
good autocorrelation properties. The major part of the implementation is done
on an FPGA in order to be able to perform the sounding in real time.},
  author       = {Elofsson, Jens and Seimar, Peter},
  keyword      = {channel sounding,MIMO,Zadoff Chu,M-sequences,USRP,FPGA},
  language     = {eng},
  note         = {Student Paper},
  title        = {Software Defined Radio based MIMO channel sounding},
  year         = {2016},
}