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