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A novel orthogonal space-time-frequency block code for OFDM systems

Keonkook Lee, Youngok Kim, Joonhyuk Kang
2009 IEEE Communications Letters  
Index Terms-Space-time/frequency block code (STBC/SFBC), OFDM.  ...  In this letter, we propose an orthogonal spacetime-frequency block code for orthogonal frequency division multiplexing (STFBC-OFDM) systems, newly designed to be robust against both time-and frequency-selective  ...  CONCLUSION In this letter, we proposed a novel orthogonal space-timefrequency block code for OFDM systems to reduce the amount of the crosstalk generated by the time-selectivity or/and frequency selectivity  ... 
doi:10.1109/lcomm.2009.090680 fatcat:or4j2kcs5rcjha5nlngkoip3sy

Pilot Assisted Channel Estimation in MIMO-STBC Systems over Time-Varying Fading Channels- A Review

Manisha Patel, Rovin Tiwari
2016 International Journal of Computer Applications  
In this paper, challenge about the condition of channel state info (CSI) in multiple-input multiple-output (MIMO) systems supported space time block codes (STBC) over slow timevarying Rayleigh attenuation  ...  We develop a novel MIMO control assessment algorithmic rule that adopts a pilot symbol assisted modulation (PSAM) which has been proved to be effective for attenuation channels.  ...  [3] " A Comb-Type Pilot Symbol Aided Channel Estimation for the STBC based OFDM System over Frequency Selective Channel" In this paper, the channel estimation method for space time block code (STBC)  ... 
doi:10.5120/ijca2016911787 fatcat:blasarxr4vblbngyi4jan3hl64

An Hybrid Coding Technique for Efficient Bandwidth Usage in conformity with IEEE 802.11 WLAN Standard

Isiaka Ajewale Alimi, Kayode Francis Akingbad, Jide Julius Popoolae, Michael O. Kolawole
2013 International Journal of Electrical and Computer Engineering (IJECE)  
In this paper, a novel hybrid space-time block coding (HSTBC) scheme is proposed for mitigating signal fading as well as enhancing the performance of MIMO-OFDM based WLANs.  ...  The signal to be transmitted is first pre-coded and the resulting output is then coded using space-time block code to form a HSTBC.  ...  In this paper, a novel hybrid space-time block coding (HSTBC) scheme is proposedfor enhancement of the performance of MIMO-OFDM based WLANs.  ... 
doi:10.11591/ijece.v3i5.3668 fatcat:qthynu6fjfgapnrtqoshviddhy

A novel approach to space-time-frequency coded MIMO-OFDM over frequency selective fading channels

Muthanna Al-Mahmoud, Michael D. Zoltowski
2010 2010 IEEE International Conference on Acoustics, Speech and Signal Processing  
This paper proposes a space-time-frequency coding scheme for MIMO-OFDM that achieves full rate for an arbitrary number of antennas with complex-valued information symbols.  ...  For example, for cases where an Orthogonal Space-Time Block (OSTBC) code exists, the new scheme is shown to provide the same full-diversity as the OSTBC.  ...  For the 2x1 MISO systems, the Alamouti ST code combined with frequency spreading yields a low BER performance with a higher rolloff than our STF code.  ... 
doi:10.1109/icassp.2010.5496289 dblp:conf/icassp/Al-MahmoudZ10 fatcat:6s77an4fcjh2tamvshso53gdau

Filter Bank Multicarrier Modulation Techniques for 5G and Beyond Wireless Communication Systems

Shatrughna Prasad Yadav
2022 European Journal of Electrical Engineering and Computer Science  
Simulation results show that the FBMC system has a better performance compared to the conventional orthogonal frequency division multiplexing (OFDM) system in terms of many parameters such as achievable  ...  channel capacity, signal to noise ratio, time, and frequency response, out of band leakage, etc.  ...  Then the time-frequency spacing is reduced by a factor of 2 for both time and frequency spacing making it equal to 0.5.  ... 
doi:10.24018/ejece.2022.6.2.423 fatcat:tyfnb2mvb5e6vbgweldw5dthfy

Quasi-Orthogonal Space-Frequency Block Codes for MIMO OFDM Channels

Fatemeh Fazel, Hamid Jafarkhani
2006 2006 IEEE International Conference on Communications  
In this paper, we propose a novel class of Space-Frequency and Space-Time-Frequency block codes based on Quasi-Orthogonal designs, over a frequency selective Rayleigh fading channel.  ...  We also discuss the conditions under which the maximum likelihood decoding for our proposed Quasi-Orthogonal Space-Frequency code is simplified as well.  ...  QUASI-ORTHOGONAL SPACE-TIME-FREQUENCY CODE STRUCTURE In this section, we introduce a new space-time-frequency code for a two-antenna system, based on the quasi-orthogonal design of Equation (7).  ... 
doi:10.1109/icc.2006.255517 dblp:conf/icc/FazelJ06 fatcat:r4gvgfv5p5alficfa67xipdd6q

Differential Space Time Frequency Codes for MIMO OFDM Systems

B. Usha Rani, K. Ramanjaneyulu
2016 Indian Journal of Science and Technology  
The proposed Differential Space-Time-Frequency Code (DSTFCs) for multiband-OFDM Ultra-WB communications is increases the efficiency of bandwidth.  ...  In general coherent detection, channel estimation requires huge number of symbols for transmission in Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra Wide Band (UWB) system, due to  ...  IFFTs of S t , then Figure 1 . 1 Space time frequency coding for MB-OFDM UWB system.  ... 
doi:10.17485/ijst/2016/v9is1/107907 fatcat:nu2vtnueojcsjp4q66vkp33zye

DESIGN & IMPLEMENTATION OF POLYPHASE FILTER TO DENOISE OFDM SIGNALS

GOUSIA NABI DAR, RAJAT JOSHI
2021 International journal of computer science and mobile computing  
An amazingly effective digital transit system that carries multiple carriers that meet in conjunction with each other over a period of time is known as the Orthogonal Frequency Division Multiplexing (OFDM  ...  This research work is based on a wireless channel to reduce the rate of error using space-time trellis codes.  ...  as Orthogonal Frequency Division Multiplexing (OFDM) system.  ... 
doi:10.47760/ijcsmc.2021.v10i06.009 fatcat:kccd4y7uqndjxeb7ojx6nbtbnq

Adaptive Time-Frequency Spreading of Quasi-Orthogonal Block Codes for MIMO-OFDM Systems

J. Ong, A. S. Jayalath, C. N. Athaudage
2006 2006 10th IEEE Singapore International Conference on Communication Systems  
This paper describes a novel low complexity time-frequency spreading of orthogonal block codes for MIMO-OFDM systems in highly time and frequency selective channels.  ...  The space-time codes (STC) and space-frequency codes (SFC) proposed in literature for MIMO-OFDM systems require a quasi-static channel, where the channel is assumed to be constant over a number of OFDM  ...  In MIMO-OFDM systems, spatial diversity gains can be achieved by employing space-time coding (STC), space-frequency coding (SFC) or space-time-frequency coding (STFC) [2] - [3] .  ... 
doi:10.1109/iccs.2006.301391 fatcat:5slrjwyttrebxftopcr5h7s2dy

A Novel MIMO - OFDM Technique for Improving Wireless Communications System Performance based on SF–BC

Ali Jasim
2015 International Journal of Computer Applications  
In this work, the author implemented a NOVEL technique of multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) based on space frequencyblock coding (SF-BC).  ...  The proposed system is implemented using MATLAB program, and the results showing best performance of a wireless communications system of higher coding gain and diversity.  ...  The implemented code is based on the quasi orthogonal space time block codes (QOSTBC) [15] - [16] . This paper is prepared as follows. In Section 3, introduce the system model.  ... 
doi:10.5120/ijca2015907225 fatcat:jib3sbqggfbntdxmvzdu3bigxi

Analysis of Peak to Average Power Ratio Reduction Techniques in Sfbc Ofdm System

T. Malathi
2013 IOSR Journal of Electronics and Communication Engineering  
In this paper, the Selected Mapping (SLM) technique and Clipping and Differential Scaling is applied to Space Frequency Block Coded (SFBC) OFDM systems to reduce the PAPR with Alamouti coding scheme.  ...  Keywords: Orthogonal frequency division multiplexing (OFDM), peak to average power ratio (PAPR), selected mapping (SLM), space frequency block coded (SFBC), Side information (SI), high power amplifiers  ...  Space Frequency Block Coded Orthogonal Frequency Division Multiplexing System Model In SFBC-OFDM systems with two transmitter antennas, the frequency-domain vector transmitted from the pth antenna is denoted  ... 
doi:10.9790/2834-0754752 fatcat:nvnm7rm6hrf2dpgxjuqgs2fqee

New Full-Diversity Space-Frequency Block Codes Based on the OSTBCs

Zahra Mohammadian, Mostafa Shahabinejad, Siamak Talebi
2012 IEEE Communications Letters  
Numerous space-frequency block codes (SFBCs) and space-time-frequency block codes (STFBCs) have been proposed so far for implementing MIMO-OFDM systems.  ...  Multi-input multi-output-orthogonal frequency-division multiplexing (MIMO-OFDM) is known as a proper solution for the wideband wireless communication.  ...  Space-frequency block codes (SFBCs) and space-time-frequency block codes (STFBCs) are two schemes for implementing MIMO-OFDM systems [6] - [15] .  ... 
doi:10.1109/lcomm.2012.091712.121278 fatcat:7ixsd7qvizhf3n2ow5p5rhsseq

Performance analysis of blind adaptive MIMO receivers

B. Balasingam, M. Bolic, S. Shahbazpanahi, T. Kirubarajan
2010 2010 IEEE International Conference on Acoustics, Speech and Signal Processing  
(MIMO-OFDM) communication systems that are based on orthogonal space-time block codes.  ...  In this paper, we derive a theoretical performance evaluation scheme of Kalman lter based channel tracking and data decoding for multiple-input multiple-output orthogonal frequency division multiplexed  ...  INTRODUCTION Multiple-input multiple-output (MIMO) systems combined with orthogonal space time block codes (OSTBCs) and orthogonal frequency division multiplexing (OFDM), known as MIMO-OFDM in the literature  ... 
doi:10.1109/icassp.2010.5495966 dblp:conf/icassp/BalasingamBSK10 fatcat:3lbg3e6vandxhjahv6njpg227a

Quasi-Orthogonal Space-Frequency and Space-Time-Frequency Block Codes for MIMO OFDM Channels

F. Fazel, H. Jafarkhani
2008 IEEE Transactions on Wireless Communications  
In this paper, we propose a novel class of Space-Frequency and Space-Time-Frequency block codes based on Quasi-Orthogonal designs, over a frequency selective Rayleigh fading channel.  ...  By coding across the three dimension of space, time and frequency, we propose a Quasi-Orthogonal Space-Time-Frequency code that is capable of achieving rate-one and exploiting all of the spatial, multipath  ...  They used trellis coding to code over space and frequency and Orthogonal Space-Time Block codes (OSTBC) [8] to code over OFDM blocks.  ... 
doi:10.1109/twc.2008.060420 fatcat:75rnwdpbuzekbpb6bdtd27s4ji

Advances in single carrier block modulation with frequency domain processing

Yeheskel Bar-Ness, Fumiyuki Adachi, Naofal Al Dhahir, David D Falconer, Hikmet Sari
2012 EURASIP Journal on Advances in Signal Processing  
likelihood signal detection method for MIMO-OFDM systems with frequency-domain spreading and code multiplexing.  ...  The accepted papers cover a number of novel and advanced aspects of single carrier block modulation with frequency domain processing: near-optimal nonlinear and iterative equalization techniques; applications  ...  likelihood signal detection method for MIMO-OFDM systems with frequency-domain spreading and code multiplexing.  ... 
doi:10.1186/1687-6180-2012-85 fatcat:bwxyubtlsfg5vkcdumi74iyhs4
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