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Data fusion in MIMO DVB-T-based passive coherent location
, Article IEEE Transactions on Aerospace and Electronic Systems ; Volume 49, Issue 3 , 2013 , Pages 1725-1737 ; 00189251 (ISSN) ; Karbasi, S. M ; Nayebi, M. M ; Sharif University of Technology
2013
Abstract
Efficient combination of MIMO (multiple-input multiple-output) and PCL (passive coherent location) ideas is expected to improve performance of localization schemes. While, in general, adding the number of transmit and receive antennas provides spatial diversity, it is possible to obtain similar effects by using multiple transmitters that are already transmitting standard signals (such as digital TV (DTV) transmission) in the environment (also known as illuminators of opportunity). However, in the case of passive schemes, it is not always possible to ensure that signals of different transmitters are orthogonal to each other. In such cases in which nonorthogonal transmitter signals are to be...
Spatial diversity gain of MIMO single frequency network in passive coherent location
, Article Scientia Iranica ; Vol. 21, Issue. 6 , 2014 , pp. 2186-2199 ; ISSN: 10263098 ; Majd, M. N ; Chitgarha, M. M ; Khalaj, B. H ; Nayebi, M. M ; Sharif University of Technology
Abstract
Recently, it has been shown that applying MIMO technology, i.e. using multiple antennas at the transmit side and multiple antennas at the receive side, improves the performance of object detection and localization. In such scenarios, the spatial diversity specifically helps overcome the fading of the cross section of the object, leading to reduced probability of missed detection. Such a phenomenon is, in fact, the dual of probability of bit error reduction in communication systems due to diversity gain. Despite the importance of such performance enhancement, this subject has not been sufficiently investigated in the PCL (Passive Coherent Location) schemes, where the transmitters (or...
Data association in multi-input single-output passive coherent location schemes
, Article IET Radar, Sonar and Navigation ; Volume 6, Issue 3 , 2012 , Pages 149-156 ; 17518784 (ISSN) ; Karbasi, S. M ; Khalaj, B. H ; Nayebi, M. M ; Sharif University of Technology
2012
Abstract
Efficient combination of multiple input multiple output (MIMO) and passive coherent location (PCL) ideas is expected to improve performance of localisation schemes. While using multiple antennas at transmit and receive sides provides spatial diversity, it is possible to obtain similar performance by using multiple transmitters, already transmitting standard signals (such as digital TV) in the environment (also known as illuminators of opportunity). However, in this case, it is not always possible to ensure that signals of different transmitters are orthogonal to each other. In such cases, resolving signals of multiple transmitters reflected from multiple objects is not a trivial problem. One...
MIMO localization by illuminators of opportunity
, Article Proceedings of 2011 IEEE CIE International Conference on Radar, RADAR 2011, 24 October 2011 through 27 October 2011 ; Volume 1 , October , 2011 , Pages 112-115 ; 9781424484416 (ISBN) ; Karbasi, S. M ; Nayebi, M. M ; Sharif University of Technology
2011
Abstract
Passive localization using MIMO techniques has attracted much attention recently. In such schemes, using multiple antennas at transmitter and receiver sides provides spatial diversity without need for identifiable transmitters. On the other hand, one of the problems facing such approach arises when transmitters of a single frequency network (SFN) are used as non-cooperative transmitters and resolving the signals of multiple transmitters reflected from multiple targets is not trivial at receiver side. Therefore, in order to obtain the diversity gain of MIMO localization schemes, it is necessary to develop a technique to assign each echo arriving at the receiver to a given transmitter. In this...
Diversity gain in MIMO passive coherent location
, Article International Radar Symposium, IRS 2011 - Proceedings, 7 September 2011 through 9 September 2011 ; September , 2011 , Pages 841-848 ; 9783927535282 (ISBN) ; Karbasi, S. M ; Nayebi, M. M ; Sharif University of Technology
2011
Abstract
MIMO (Mulitple Input Multiple Output) localization has attracted much attention recently. In such schemes, using multiple antennas at transmitter and receiver sides provides spatial diversity. On the other hand, Passive Coherent Location (PCL) by using the illuminators of opportunity (such as FM, GSM, DVB transmitters) has shown a number of advantages. In this paper, we explore the possibility of achieving diversity gain by using multiple non-cooperative transmitters. In earlier works on MIMO localization, cooperative transmitters were assumed, so that orthogonality between transmitted waveforms could be granted. However, such orthogonality condition is not assumed in the case of PCL...
The detector's output SNR as a criterion for receiver placement in MIMO DVB-T based passive coherent location
, Article International Congress on Ultra Modern Telecommunications and Control Systems and Workshops ; 2012 , Pages 431-435 ; 21570221 (ISSN) ; 9781467320153 (ISBN) ; Radmard, M ; Majd, M. N ; Khalaj, B. H ; Nayebi, M. M ; Sharif University of Technology
2012
Abstract
As the DVB-T (Digital Video Broadcasting-Terrestrial)'s use is outspreading, one of its interesting emerging applications is to use DVB-T stations as non-cooperative transmitters in order to detect and localize targets. An important and favorable characteristic of DVB-T for this application is its being working in a Single Frequency Network (SFN), so that multiple transmitters can be used simultaneously to detect the targets. In addition, using multiple antennas at the receiver side leads to the well known configuration known as MIMO. However, one of the obstacles, arisen in such configurations, is the receive antennas' placement in proper positions so that the detection performance is...
MIMO PCL in a single frequency network
, Article 2011 Microwaves, Radar and Remote Sensing Symposium, MRRS-2011 - Proceedings, 25 August 2011 through 27 August 2011 ; August , 2011 , Pages 280-283 ; 9781424496440 (ISBN) ; Karbasi, S. M ; Khalaj, B. H ; Nayebi, M. M ; Sharif University of Technology
2011
Abstract
Passive localization using MIMO techniques has attracted much attention recently. In such schemes, using multiple antennas at transmitter and receiver sides provides spatial diversity without need for identifiable transmitters. On the other hand, one of the problems facing such approach arises when transmitters of a single frequency network (SFN) are used as non-cooperative transmitters and resolving the signals of multiple transmitters reflected from multiple targets is not trivial at receiver side. Therefore, in order to obtain the diversity gain of MIMO localization schemes, it is necessary to develop a technique to assign each echo arriving at the receiver to a given transmitter. In this...