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Joint Timing Synchronization and Channel Estimation Using Perfect Sequence in Uplink Time Domain Synchronous OFDMA

M. Lakshmanan, P.S. Mallick, L. Nithyanandan
2016 International Journal of Electronics and Telecommunications  
Time-space two dimensional structure is used in TDS-OFDMA and perfect sequence is used for guard interval to achieve perfect timing synchronization and channel estimation for each user.  ...  Time Domain Synchronous Orthogonal Frequency Division Multiple Access (TDS-OFDMA) is used in mobile broadband wireless access scheme in uplink transmission.  ...  In this paper, an efficient method for joint timing synchronization and channel estimation in uplink TDS-OFDMA is proposed using perfect sequence.  ... 
doi:10.1515/eletel-2016-0030 fatcat:hrevzotw5jadrcov3i5y6nrk64

A Novel Uplink Multiple Access Scheme Based on TDS-FDMA

Linglong Dai, Zhaocheng Wang, Sheng Chen
2011 IEEE Transactions on Wireless Communications  
This contribution proposes a novel time-domain synchronous frequency division multiple access (TDS-FDMA) scheme to support multi-user uplink application.  ...  A unified frame structure for both single-carrier and multi-carrier transmissions and the corresponding low-complexity receiver design are derived.  ...  In addition, the identical postfixes provide the cyclic property in the frame structure, which can be used for uplink timing and carrier frequency offset synchronization [13] .  ... 
doi:10.1109/twc.2011.011111.102070 fatcat:ktrcpqyk3fh2xaltnza2vs3nhy

A novel BWA system based on Time and Frequency domain United processing

Xin Su, Jie Zeng, Xibin Xu, Limin Xiao
2014 2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)  
The physical layer technologies focus on Time domain and Frequency domain United Orthogonal Frequency Division Multiple Access (TFU-OFDMA), Time domain and Frequency domain United Single Carrier Modulation  ...  for BWA.  ...  Then at the receiver, synchronization and channel estimation are completed by the joint of the PN sequences and specific pilots inserted in time and frequency domain.  ... 
doi:10.1109/wiopt.2014.6850287 dblp:conf/wiopt/SuZXX14 fatcat:i2vaacmg3zhozirtzxqkw564ne

Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years

Ali A. Nasir, Salman Durrani, Hani Mehrpouyan, Steven D. Blostein, Rodney A. Kennedy
2016 EURASIP Journal on Wireless Communications and Networking  
Timing and carrier synchronization is a fundamental requirement for any wireless communication system to work properly.  ...  Considering both single-carrier and multi-carrier communication systems, we survey and categorise the timing and carrier synchronization techniques proposed for the different communication systems focusing  ...  In addition to joint timing and carrier synchronization, [150] considers time domain synchronous (TDS)-OFDM system which replaces cyclic prefix with a pseudo noise (PN) and thus proposes PN-correlation-based  ... 
doi:10.1186/s13638-016-0670-9 fatcat:xqzvzx4trrgdnbw2sde5gjoisa

Evolution from TD-SCDMA to FuTURE [chapter]

Xiaodong Xu, Lihua Li, Ping Zhang
2009 Internet and Communications  
The dedicated time slot (TS1) is used for both uplink and downlink frame and frequency synchronization. The remainders are designed for data transmission.  ...  TD-SCDMA has adopted many advanced technologies, such as synchronous CDMA, smart antenna, joint detection, SDR, baton handover, and dynamic channel allocation (DCA).  ... 
doi:10.1201/9781420072112.ch2 fatcat:xnhslgf2qfhe5gadpbmzzyc45u

Next-Generation CDMA vs. OFDMA for 4G Wireless Applications

Hsiao-Hwa Chen, Xi Zhang, Wen Xu
2007 IEEE wireless communications  
Today, both CDMA and OFDMA have been adopted by various standards. CDMA is used in IS-95, CDMA2000, wideband CDMA (W-CDMA), time-division synchronous CDMA (TD-SCDMA), and so on.  ...  Xia, and K. B. Letaief provide an overview of space-time (ST) coding, space-frequency (SF) coding, and space-time-frequency (STF) coding schemes for MIMO-OFDM systems.  ...  Today, both CDMA and OFDMA have been adopted by various standards. CDMA is used in IS-95, CDMA2000, wideband CDMA (W-CDMA), time-division synchronous CDMA (TD-SCDMA), and so on.  ... 
doi:10.1109/mwc.2007.386606 fatcat:ndeaimpk5vas5lhsni2ekrmh7y

A Novel Multi-Phase Initial Ranging Process for OFDMA Systems: An Improved dynamic Threshold Based Multi-user Detection Approach

Naveen Gowda Kn, Ramesha K
2020 IET Communications  
For all active channels, round trip delay, and power level are estimated by considering particular channel coefficient and timing offset.  ...  The iterative expectation maximisation algorithm is involved in the estimation of channel coefficient and timing offset.  ...  To estimate timing offset and channel coefficient, time-space two-dimensional structure is utilised for TDS-OFDMA system.  ... 
doi:10.1049/iet-com.2019.0936 fatcat:xan76hbzlzgb3jxj5k5f75x52m

Turbo Estimation and Equalization for Asynchronous Uplink MC-CDMA

M. Guenach, M. Marey, H. Wymeersch, H. Steendam, M. Moeneclaey
2008 IEEE Transactions on Wireless Communications  
In this contribution, we propose a new code-aided synchronization and channel estimation algorithm for uplink MC-CDMA.  ...  The space alternating generalized expectationmaximization (SAGE) algorithm is used to estimate the channel impulse responses, propagation delays and carrier frequency offsets of the different users.  ...  Fig. 8 . 8 Joint frame-frequency synchronization and channel estimation: pmf of timing estimation error at E b /N 0 = 6 dB for 5 new users accessing the system (Knew = 5) usingF (k) (ξ = 0) = 0 as a frequency  ... 
doi:10.1109/twc.2008.060648 fatcat:sgblof5cxjcmjdmesxcrmuo6je

Next-generation digital television terrestrial broadcasting systems: Key technologies and research trends

Linglong Dai, Zhaocheng Wang, Zhixing Yang
2012 IEEE Communications Magazine  
Some frequency-domain pilots within the OFDM data block are used for synchronization and channel estimation to achieve reliable transmission.  ...  For DTMB standard where TDS-OFDM signal is used, the time-frequency joint positioning method has been proposed [16] , whereby the transmission parameter signaling (TPS) embedded in TDS-OFDM signals is  ... 
doi:10.1109/mcom.2012.6211500 fatcat:7ohnzfmhjjca5j3g5u356wm5za

Multi-User Interference Cancellation Schemes for Carrier Frequency Offset Compensation in Uplink OFDMA

Huan Cong Nguyen, Elisabeth de Carvalho, Ramjee Prasad
2014 IEEE Transactions on Wireless Communications  
In this paper, novel time-domain multi-user interference cancellation schemes for OFDMA uplink are proposed.  ...  Each user in the uplink of an Orthogonal Frequency Division Multiple Access (OFDMA) system may experience a different carrier frequency offset (CFO).  ...  The system model and conventional receiver structures for the OFDMA uplink are presented in Section II.  ... 
doi:10.1109/twc.2014.021414.070718 fatcat:6oodgeqkrrehjeplkelxcb7be4

Radio Access Technologies for Broadband Mobile Communications

Mamoru SAWAHASHI, Kenichi HIGUCHI
2017 IEICE transactions on communications  
Taromaru of Fukuoka University, former Chair of RCS Committee and Prof. H.  ...  Murata of Kyoto University, Chair of RCS Committee for giving us this opportunity to contribute to the special issue of this transaction.  ...  The NPSS and NSSS are used to perform cell search that includes the processes of timing detections, time and frequency synchronization, and cell ID detection.  ... 
doi:10.1587/transcom.2016pfi0015 fatcat:gtecaptzczeu7aqdkmcwyssonq

Signal processing advances for 3G WCDMA: From rake receivers to blind techniques

Youngchul Sung, Yirang Lim, Lang Tong, A.-J. van der Veen
2009 IEEE Communications Magazine  
Sung and Y. Lim was supported by the Ministry of Knowledge Economy (MKE)/ Institute for Information Technology Advancement (IITA).  ...  ., frequency tracking loop and time tracking loop), and further processing units for coherent demodulation and decoding.  ...  With universal frequency reuse, most of all, cell edge users in OFDMA systems suffer intercell interference even with sophisticated bin assignment for the physical channel due to the lack of interference  ... 
doi:10.1109/mcom.2009.4752676 fatcat:kzshlnbjknblzdolbpdfqlkrtq

FHQA JDRA Schemes for Reliability and Energy Efficiency - Soft-DF-based OR-Assisted SC-FDMA

D. Prabakar, C.Gowthami C.Gowthami
2015 International Journal of Computer Applications  
systems.  ...  We proposed two joint dynamic resource allocation (JDRA) schemes by assuming that the pilotaided channel-quality information (CQI) of all the users may be exchanged.  ...  We would like to also thank Ala Hawash, Andreas Manoli, Anton Deik, Bilal Farraj, and Constantinos Savvides for their support and help in the implementation of MashQL.  ... 
doi:10.5120/20862-3573 fatcat:sfdtry46vfgx7ftazyl7csalbe

Unified MIMO-Multicarrier Designs: A Space–Time Shift Keying Approach

Mohammad Ismat Kadir, Shinya Sugiura, Sheng Chen, Lajos Hanzo
2015 IEEE Communications Surveys and Tutorials  
A survey and tutorial is provided on the subject of multiple-input-multiple-output (MIMO) multicarrier (MC) systems relying on the space-time shift keying (STSK) concept.  ...  We also provide a rudimentary introduction to MC differential STSK employing both conventional differential detection and multiple-symbol differential sphere decoding for the sake of dispensing with channel  ...  TD Time Domain. TTCM Turbo Trellis-Coded Modulation. TU Typical Urban. UL Uplink. V-BLAST Vertical Bell Laboratories Layered Space-Time. VAA Virtual Antenna Array.  ... 
doi:10.1109/comst.2014.2375321 fatcat:iuozclpzqrbbzhjr4uu2rcc52a

A Tutorial on 3GPP Initial Cell Search: Exploring a Potential for Intelligence Based Cell Search

SeungHwan Won, Sang Won Choi
2021 IEEE Access  
Synchronization Signal UL UpLink OFDM Orthogonal Frequency Division Multiplexing UpPTS Uplink Pilot Time Slot OFDMA Orthogonal Frequency Division Multiple Access USIM Universal Subscriber Identity  ...  process of 3GPP systems in both downlink and uplink Full details of ICS procedures of W-CDMA, TD-SCDMA, Long Term Evolution Frequency Division Duplex (LTE-FDD), Time Division LTE (TD-LTE), and NR operating  ...  This property is also often referred to as Fourier transform duality, which is exploited for devising efficient PSS detection in the time-domain. • Frequency shift ( 6 in Fig. 29 ): An integer amount  ... 
doi:10.1109/access.2021.3095346 fatcat:jwltijmzdrfhfny5mwz42mjg7m
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