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Estimation of Carrier Frequency Offset for Multicarrier CDMA Uplink
2007
IEEE Transactions on Signal Processing
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This paper presents a training-based estimation method of carrier frequency offset (CFO) for multicarrier codedivision multiple-access (MC-CDMA) uplink. ...
The proposed approach is investigated both in the subband and interleaved MC-CDMA systems. ...
Serpedin, and the reviewers for the efficient review process and constructive comments. ...
doi:10.1109/tsp.2006.890883
fatcat:ag7zq4jrqbeo7lvyesaw56gsu4
Adaptivity in MC-CDMA Systems
[chapter]
2006
Multi-Carrier Spread-Spectrum
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Based on the theoretical lower bounds for the different approaches we design multi-user concepts and present their performances in fading channels with different system loads. ...
This paper investigates the performance of MC-CDMA with link adaptation in the uplink of a wireless communication system. ...
Figure 3 . 3 Block diagram of the uplink MC-CDMA transmission system (a) transmitter and (b) receiver. ...
doi:10.1007/1-4020-4437-2_4
fatcat:l6xsg5hhkvefrb6xi7qs6xnf2q
Channel estimation and tracking for MC-CDMA signals
2004
Transactions on Emerging Telecommunications Technologies
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Pilot blocks are periodically inserted into the downlink data stream to perform a least-squares channel estimation. ...
This paper investigates the impact of channel estimation errors in the uplink and downlink of a multicarrier code-division multiple-access system. ...
For notational simplicity we drop the block index m and assume that the pilot blocks have an OFDM structure (i.e., the pilot symbols are not spread). ...
doi:10.1002/ett.970
fatcat:dobmhhwwwramrplvkoh6hh3bom
Design of pilot signal for MC-CDMA uplink systems
2004
2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577)
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In this paper, we consider the design of a novel pilot signal for both symbol synchronization and channel estimation. ...
Coherent demodulation needs to maintain the symbol timing synchronization and to estimate the channel response in multicarrier code division multiple access systems. ...
To alleviate this problem, we design a novel pilot signal that can be used for both synchronization and channel estimation. ...
doi:10.1109/icc.2004.1313057
dblp:conf/icc/YuL04
fatcat:h4xu4shryrhb3ok3ob5zvwbrh4
Generalized Multi-Carrier CDMA for MUI/ISI-Resilient Uplink Transmissions Irrespective of Frequency-Selective Multipath
[chapter]
2000
Multi-Carrier Spread Spectrum & Related Topics
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Relying on symbol blocking and judicious design of user codes, this paper develops a Generalized Multicarrier (GMC) quasi-synchronous CDMA system capable of multiuser interference (MUI) elimination and ...
Analytic evaluation and simulations illustrate that GMC-CDMA outperforms competing MC-CDMA alternatives especially in the presence of uplink multipath channels. ...
Barbarossa for discussions on this and related subjects. ...
doi:10.1007/978-1-4615-4463-0_3
fatcat:avgb5vsa55gbnk3acjvf7wcbym
Switched Interleaving Techniques with Limited Feedback for Interference Mitigation in DS-CDMA Systems
2011
IEEE Transactions on Communications
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In this paper we propose a novel switchedinterleaving algorithm based on limited feedback for both uplink and downlink DS-CDMA systems. ...
We present symbol-based and block-based linear minimum mean squared error (MMSE) receivers for interference suppression. ...
In [3] the authors proposed a pilot-aided chipinterleaving algorithm for the uplink of a CDMA system, and the proposed system is capable of outperforming the conventional DS-CDMA (C-CDMA) one by using ...
doi:10.1109/tcomm.2011.051711.090120a
fatcat:sn6va3qenjep7pjrqkep2cswaq
Implementation of W-CDMA System Based on IP Functions
2011
Advanced Materials Research
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This paper presents architecture design and field programmable gate array (FPGA) implementation for Wideband Code Division Multiple Access (W-CDMA) transceiver system. ...
The paper describes how to implement a W-CDMA system that conforms to the IMT-2000 standard using Altera FPGAs and IP functions. ...
For uplink, pilot symbols are spread by spreading codes different from the data and are I/Q-multiplexed with the data. ...
doi:10.4028/www.scientific.net/amr.213.315
fatcat:psrxkfddq5gptis7kvh7bke664
Joint Frequency-Domain Differential Detection and Equalization for 2-Dimensional Spread/Chip-Interleaved DS-CDMA Uplink Transmissions
2006
IEEE Vehicular Technology Conference
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However, coherent FDE needs channel estimation. Pilot-assisted channel estimation is not reliable in a fast fading environment. ...
In this paper, we apply joint frequencydomain differential detection and equalization (FDDDE) that requires no channel estimation to 2D spread/chipinterleaved DS-CDMA in a multiuser/multipath environment ...
If the pilot-assisted channel estimation is used, the known pilot chip blocks need to be periodically transmitted. ...
doi:10.1109/vtcf.2006.369
dblp:conf/vtc/LiuA06
fatcat:hs3qodeepzc45ib773ehnkqb3q
Analysis of Carrier Frequency Selective Offset Estimation - Using Zero-IF and ZCZ In MC-DS-CDMA
2013
International Journal of Electronics and Electrical Engineering
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block-fading channels. ...
The variance for Carrier Frequency Offset (CFO) estimators of MC-DS-CDMA Uplink is compared with that of an OFDM system to estimate the CFO. ...
Djebbari, "Blind channel equalization and carrier frequency offset estimation for MC-CDMA systems using guard interval redundancy and excess codes," Int. J. Electron. ...
doi:10.12720/ijeee.1.3.171-175
fatcat:76rfj3oxsrbddcht3snmcz5ku4
Group-Orthogonal Multicarrier CDMA
2004
IEEE Transactions on Communications
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In the presence of frequency-selective multipath fading channels, code-division multiple access (CDMA) suffers from multiuser interference (MUI) and intersymbol interference (ISI); but when properly designed ...
In this paper, we merge the advantages of OFDMA and CDMA to minimize MUI effects, and also enable the maximum available diversity for every user. ...
ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers for their careful reading and critique of the manuscript. Their comments and suggestions improved the presentation of this paper. ...
doi:10.1109/tcomm.2003.822174
fatcat:a2jkxewz3jcudd47dpigy6jdnq
The Performance of Space-Time Coded Cooperative Diversity in an Asynchronous Cellular Uplink
2006
MILCOM 2006
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We also present a practical system design and we provide bit-error-probability simulations under the practical adaptive receiver design. ...
cooperative diversity in a cellular uplink. ...
Adaptive Receiver Design: We present an adaptive structure based on existing MMSE channel estimation schemes using periodicallyinserted pilot symbols. ...
doi:10.1109/milcom.2006.302069
fatcat:nnnm6qqp55amnpvvjcm3c74hfa
IFDMA: A Scheme Combining the Advantages of OFDMA and CDMA
2007
IEEE wireless communications
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Moreover, Interleaved Frequency Division Multiple Access (IFDMA) is shown to be a scheme that combines the advantages of both, CDMA and OFDMA, and is a promising candidate MA scheme especially for non-adaptive ...
-(DS-)CDMA Walsh-Hadamard -full bandwidth CDMA Block transmission DS-CDMA Walsh-Hadamard DFT full bandwidth CDMA IFDMA -DFT interleaved FDMA FDOSS DFT full bandwidth CDMA VSCRF-CDMA Walsh-Hadamard DFT ...
In the following, the losses due to pilot symbol overhead for channel estimation are briefly discussed. ...
doi:10.1109/mwc.2007.386607
fatcat:s3xkqpw5n5d6dhovn4xs5idora
An Adaptive CMMSE Receiver for Space–Time Block-Coded CDMA Systems in Frequency- Selective Fading Channels
2004
IEEE Transactions on Vehicular Technology
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The advantage of the proposed receiver over the existing receivers for STBC CDMA systems is demonstrated by comparing the closed-form expressions of the signal-to-interference plus noise ratio and simulated ...
A technique that can suppress multiple-access interference (MAI) in space-time block-coded (STBC) multiple-inputmultiple-output (MIMO) code-division multiple-access (CDMA) systems is developed. ...
In addition, it only requires one spreading sequence for each user and periodically inserted pilot symbols for channel estimation. ...
doi:10.1109/tvt.2004.825759
fatcat:33iypmymobcljc7geufw3ziizi
UMTS/IMT-2000 based on wideband CDMA
1998
IEEE Communications Magazine
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The layer 1 control information consists of known pilot bits for downlink channel estimation, power control commands for uplink closed-loop power control, and a transport format indicator (TFI). ...
Figure 7 illustrates the spreading and modulation for the uplink dedicated physical channels. ...
doi:10.1109/35.714620
fatcat:fpw44pj4rzez5pn2syg5ezximq
Signal processing advances for 3G WCDMA: From rake receivers to blind techniques
2009
IEEE Communications Magazine
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Sung and Y. Lim was supported by the Ministry of Knowledge Economy (MKE)/ Institute for Information Technology Advancement (IITA). ...
Here, a channel estimate is required for signal reconstruction, and the channel estimate may not be accurate, especially when the pilot channel operates in low signal-to-noise ratio (SNR) and the traffic-to-pilot ...
For this method, however, the selfinterference from the pilot channel and data channel is caused for each tap estimate by multipath fading. ...
doi:10.1109/mcom.2009.4752676
fatcat:kzshlnbjknblzdolbpdfqlkrtq
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