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A MIMO-OFDM Testbed for Wireless Local Area Networks
2006
EURASIP Journal on Advances in Signal Processing
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We describe the design steps and final implementation of a MIMO OFDM prototype platform developed to enhance the performance of wireless LAN standards such as HiperLAN/2 and 802.11, using multiple transmit ...
We also comment on some antenna and RF issues which are of importance for the final realization of the testbed. ...
Different parts of the OFDM preamble ( Figure 10 ) are used at each step: the A-field is used for coarse AGC and frame detection, the B-field is used for AGC setting, fine time synchronization, and frequency ...
doi:10.1155/asp/2006/18083
fatcat:vel6ljklsjavnhaigm27tyah4e
Spectrum Monitoring Using Energy Ratio Algorithm For OFDM-Based Cognitive Radio Networks
[article]
2015
arXiv
pre-print
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This paper presents a spectrum monitoring algorithm for Orthogonal Frequency Division Multiplexing (OFDM) based cognitive radios by which the primary user reappearance can be detected during the secondary ...
Furthermore, our method achieves high immunity to frequency-selective fading channels for both single and multiple receive antenna systems, with a complexity that is approximately twice that of a conventional ...
The frequency domain OFDM frame is constructed by combining: (a) One or more training symbols or preambles that are used for both time and frequency synchronization at the receiver side. ...
arXiv:1506.06213v1
fatcat:hd2rmi7iw5hzdhrepgcowgaou4
Spectrum Monitoring Using Energy Ratio Algorithm for OFDM-Based Cognitive Radio Networks
2015
IEEE Transactions on Wireless Communications
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This paper presents a spectrum monitoring algorithm for Orthogonal Frequency Division Multiplexing (OFDM) based cognitive radios by which the primary user reappearance can be detected during the secondary ...
Furthermore, our method achieves high immunity to frequency-selective fading channels for both single and multiple receive antenna systems, with a complexity that is approximately twice that of a conventional ...
The frequency domain OFDM frame is constructed by combining: (a) One or more training symbols or preambles that are used for both time and frequency synchronization at the receiver side. ...
doi:10.1109/twc.2014.2384024
fatcat:nhnxxyasrrgu5gv4tli4ykeqee
D-Fi: A diversity-aware Wi-Fi using an OFDM-based Bloom filter
2012
2012 20th IEEE International Conference on Network Protocols (ICNP)
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The D-Fi design allows to estimate channel quality while D-Fi is performing channel contention using an OFDM-based Bloom filter. ...
for data transfer. ...
ACKNOWLEDGMENT We owe special thanks to the anonymous reviewers and Young-myoung Kang for their thorough and helpful feedback, which was tremendously vital to significantly improve the contents and presentation ...
doi:10.1109/icnp.2012.6459964
dblp:conf/icnp/LeeK12
fatcat:2axkqpwwsnhdbaywhgyg35krpy
WILOCSIM: SIMULATION TESTBED FOR WLAN LOCATION FINGERPRINTING SYSTEMS
2013
Progress in Electromagnetics Research B
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This paper introduces a novel simulation testbed for investigating WLAN indoor localization systems. ...
In addition, the capabilities of the testbed are demonstrated using two variants of the nearest neighbor classification based indoor localization algorithm. ...
ACKNOWLEDGMENT The authors would like to thank Ministry of Higher Education (MOHE), Malaysia for supporting this work. ...
doi:10.2528/pierb12100805
fatcat:r6zmstsv45bydedk7wjtu6q2xu
A unified message-passing algorithm for MIMO-SDMA in software-defined radio
2017
EURASIP Journal on Wireless Communications and Networking
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As a use-case, we consider the high-rate packet-oriented IEEE 802.11n standard. ...
The algorithm minimizes the region-based variational free energy in the system under appropriate conditions and, hence, converges to a fixpoint. ...
The latter choice accounts for the time periodicity of the preamble. The synchronizer seeks to find the joint estimate {τ 1 , . . . ...
doi:10.1186/s13638-016-0786-y
fatcat:3z3e4w3a4bd7vb7fmi6l4zywpm
RF Impairments in Wireless Transceivers: Phase Noise, CFO, and IQ Imbalance – A Survey
2021
IEEE Access
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Furthermore, we discuss artificial intelligence (AI) approaches for developing estimation and compensation algorithms for RF impairments. ...
Moreover, we review RF-impairment estimation and compensation in singlecarrier (SC) and multicarrier systems, especially orthogonal frequency division multiplexing (OFDM). ...
No Algorithm for OFDM-based WLANs [228] Freq.Sel. Est. No LS algorithm using packet preamble (IEEE 802.11a preamble) [230] Freq.Sel. Est. ...
doi:10.1109/access.2021.3101845
fatcat:ete2cakeerdjrahum3gcuuexwe
Asynchronous Medium Access Protocol for Multi-User MIMO Based Uplink WLANs
2012
IEEE Transactions on Communications
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Index Terms Asynchronous MAC protocol, multi-user MIMO WLANs, throughput analysis, multi-packet reception capability. ...
Multi-user multiple-input multiple-output (MIMO) technology makes it possible for wireless nodes to successfully receive multiple packets from simultaneous transmitters in wireless networks. ...
April 5, 2012 DRAFT 5 In this paper, we consider a multiuser orthogonal frequency-division multiplexing (OFDM)based WLAN system as a practical MPR-capable system. ...
doi:10.1109/tcomm.2012.090512.110300
fatcat:xoqhza3zrnfz3pqtzbc7bq6tre
Enabling Technologies for Ultra-Reliable and Low Latency Communications: From PHY and MAC Layer Perspectives
2019
IEEE Communications Surveys and Tutorials
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The paper evaluates the relevant PHY and MAC techniques for their ability to improve the reliability and reduce the latency. ...
Dedicated preambles reduce the number of preambles remaining for contention-based RA. ...
OFDM-based waveform is supported in 3GPP Release 14 DL, and the cyclic prefix OFDM (CP-OFDM)/discrete fourier transform-spread-OFDM (DFT-s-OFDM) based waveforms are mandatory for UE in UL [31] , [71] ...
doi:10.1109/comst.2019.2897800
fatcat:jgaahgi27rev3ieyrisn2yvh5m
Radar Imaging Based on IEEE 802.11ad Waveform in V2I Communications
[article]
2022
arXiv
pre-print
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In this paper, an IEEE 802.11ad waveform-based radar imaging technique is proposed for vehicular settings. ...
The proposed ISAR imaging first estimates the round-trip delays using a good correlation property of Golay complementary sequences in the IEEE 802.11ad preamble. ...
The STF is used for frame synchronization and frequency offset estimation, and the CEF is for channel estimation. ...
arXiv:2208.02473v1
fatcat:sj4domtlvnav7lvp7yratdt6hq
2010 Index IEEE Transactions on Signal Processing Vol. 58
2010
IEEE Transactions on Signal Processing
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Isukapalli, Y., +, TSP April 2010 2298-2314 Preamble-Based Channel Estimation for CP-OFDM and OFDM/OQAM Systems: A Comparative Study. ...
Callegari, S., +, TSP Dec. 2010 6126-6139
Preamble-Based Channel Estimation for CP-OFDM and OFDM/OQAM
Systems: A Comparative Study. ...
Global Positioning System A Fixed-Lag Particle Filter for the Joint Detection/Compensation of Interference Effects in GPS Navigation. ...
doi:10.1109/tsp.2010.2092533
fatcat:4y66ezuo7zf6doe6nwjqwtc42i
A survey of spectrum sensing algorithms for cognitive radio applications
2009
IEEE Communications Surveys and Tutorials
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In this paper, a survey of spectrum sensing methodologies for cognitive radio is presented. ...
Furthermore, statistical modeling of network traffic and utilization of these models for prediction of primary user behavior is studied. ...
For analyzing the WLAN channel usage characteristics, packet preambles of IEEE 802.11b [71] signals are exploited in [55] , [56] . ...
doi:10.1109/surv.2009.090109
fatcat:lq37fnncovdvnpv556yxwkrgd4
Radio Resource Management in Joint Radar and Communication: A Comprehensive Survey
[article]
2021
arXiv
pre-print
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First, we give fundamental concepts of JRC, important performance metrics used in JRC systems, and applications of the JRC systems. ...
However, there are several challenges to be solved for the JRC design. ...
Fig. 10 : 10 A JRC system based on IEEE 802.11ad frame in which the preamble is used for object parameter estimation and the data blocks are used for data communication. ...
arXiv:2007.13146v3
fatcat:aq5ti5uruvgczpfcrtulcfehf4
Device Fingerprinting in Wireless Networks: Challenges and Opportunities
[article]
2015
arXiv
pre-print
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In particular, we aim to provide a detailed treatment on developing novel wireless security solutions using device fingerprinting techniques. ...
both white-list based and unsupervised learning approaches, and (iii) to identify key open research problems in the area of device fingerprinting and feature extraction, as applied to wireless security ...
frames and use it as device feature. ...
arXiv:1501.01367v1
fatcat:xjzysezfjfbylce2227vzydhwm
DeepWiFi: Cognitive WiFi with Deep Learning
[article]
2019
arXiv
pre-print
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Users optimize their transmit power for low probability of intercept/detection and their MCS to maximize link rates used by backpressure algorithm for routing. ...
DeepWiFi is interoperable with baseline WiFi and builds upon the existing WiFi's PHY transceiver chain without changing the MAC frame format. ...
While DeepWiFi algorithms do not require synchronization, we consider slotted time in discrete time simulation and follow the 802.11ac MAC's synchronization that uses the synchronizing timers in the preamble ...
arXiv:1910.13315v1
fatcat:yutockq3xzhprlfr6uyam37uoe
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