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Blind adaptive algorithm for demodulation of DS/CDMA signals with mismatch

H.-C. Hwang, C.-H. Wei
1999 IEE Proceedings - Communications  
A new blind adaptive algorithm is presented to mitigate the effect of the mismatch caused by the timing error in acquisition.  ...  Several numerical results show that the new algorithm can provide a resistance to the effect of mismatch compared to the MOE and Griffiths' algorithms.  ...  To mitigate the effect of mismatch, we present a new blind adaptive algorithm for near-far resistant DS/CDMA demodulation in the presence of timing error.  ... 
doi:10.1049/ip-com:19990284 fatcat:jwahmfdvnzfebchtkytmvqhjra

Blind adaptive interference suppression for the near-far resistant acquisition and demodulation of direct-sequence CDMA signals

U. Madhow
1997 IEEE Transactions on Signal Processing  
In this paper, we present a blind adaptive interference suppression technique for joint acquisition and demodulation, which has the unique feature that the output of the acquisition process is not simply  ...  the timing of the desired transmission, but a near-far resistant demodulator that implicitly accounts for knowledge of the timing and amplitudes of all transmissions to suppress the multiple-access interference  ...  In this paper, we use the blind adaptive demodulator in [3] as a building block for a blind adaptive interference suppression scheme for joint acquisition and demodulation.  ... 
doi:10.1109/78.552211 fatcat:svvyyrhyerapvp72xb6dca3tpi

Performance Analysis of the Blind Minimum Output Variance Estimator for Carrier Frequency Offset in OFDM Systems

Feng Yang, Kwok H Li, Kah C Teh
2006 EURASIP Journal on Advances in Signal Processing  
It must be estimated and compensated before demodulation to guarantee the system performance. In this paper, we examine the performance of a blind minimum output variance (MOV) estimator.  ...  Carrier frequency offset (CFO) is a serious drawback in orthogonal frequency division multiplexing (OFDM) systems.  ...  Minimum output variance (MOV) estimator In the presence of CFO, the received signal, after DFT demodulation, is given by d(m) = W H y(m) = W H ΦWHs(m) + n (m), (7) where W H represents the DFT demodulation  ... 
doi:10.1155/asp/2006/49257 fatcat:pxdcvysa7baa5dmraxpr3omvxy

A Low-complexity Channel Shortening Receiver with Diversity Support for Evolved 2G Device [article]

Sha Hu, Harald Kroll, Qiuting Huang, Fredrik Rusek
2015 arXiv   pre-print
In presence of diversity, intersymbol interference (ISI) equalization and co-channel interference (CCI) suppression are usually very complex.  ...  Diversity in 2G devices can be present both in form of multiple receive branches and blind repetitions.  ...  Unlike DDF-MLM equalizer in the HOM demodulator which needs parallel branch metric computation for each diversity branch, the MLM equalizer in the MILB demodulator only requires a single branch metric  ... 
arXiv:1511.07702v1 fatcat:p5uj5aah5nf6jludkmku6gulze

Space-time multiuser detection in multipath CDMA channels

Xiaodong Wang, H.V. Poor
1999 IEEE Transactions on Signal Processing  
Blind adaptive space-time multiuser detection techniques are then proposed, which require prior knowledge of only the spreading waveform and the timing of the desired user's signal.  ...  The problem of multiuser detection in multipath CDMA channels with receiver antenna array is considered.  ...  Bit error rate versus SNR for four receivers in the presence of unknown interferers.  ... 
doi:10.1109/78.782180 fatcat:deor2g5q65hqtofzi34cfulla4

Implementation aspects of a transmitted-reference UWB receiver

Mario R. Casu, Giuseppe Durisi
2005 Wireless Communications and Mobile Computing  
Several simulation results obtained by means of a behavioral model are presented, together with an analysis of the trade-off between performance and complexity in an integrated circuit implementation.  ...  In this paper, we discuss the design issues of an ultra wide band (UWB) receiver targeting a single-chip CMOS implementation for low data-rate applications like ad hoc wireless sensor networks.  ...  Acknowledgment This work has been sponsored by MIUR (Italian Ministry of Education and Research) under the project PRIMO.  ... 
doi:10.1002/wcm.309 fatcat:ace5x56lnbcgjnrobknlntybx4

Blind adaptive multiuser detection

M. Honig, U. Madhow, S. Verdu
1995 IEEE Transactions on Information Theory  
The decorrelating detector and the linear minimum mean-square error (MMSE) detector are known to be effective strategies to counter the presence of multiuser interference in code-division multiple-access  ...  The proposed blind multiuser detector is made robust with respect to imprecise knowledge of the received signature waveform of the user of interest.  ...  INTRODUCTION ULTIUSER detection deals with the demodulation of M digitally modulated signals in the presence of multiaccess interference.  ... 
doi:10.1109/18.391241 fatcat:24lhetz6arbo3co3nwhmlp4jui


Erdal Panayırcı, Costas Georghiades, Xiaodong Wang, Hakan A Çırpan
2005 EURASIP Journal on Wireless Communications and Networking  
In particular, the development of suitable algorithms for wireless multipleaccess systems in nonstationary and interference-rich environments presents major challenges to the system designer.  ...  Although over the past decade such methods have been successfully applied in a variety of communication contexts, many technical challenges remain in emerging applications, whose solutions will provide  ...  At the receiver, a blind turbo receiver is developed for joint OFDM demodulation and MDSQ decoding.  ... 
doi:10.1155/wcn.2005.79 fatcat:rhphaarogjbqdjldqbqa6syxim

Blind adaptive interference suppression for direct-sequence CDMA

U. Madhow
1998 Proceedings of the IEEE  
In this paper, we present recent developments in interference suppression using blind adaptive receivers that do not require knowledge of the signal waveforms and propagation channels of the interference  ...  , and that require a minimal amount of information about the desired signal.  ...  cancellation methods can (in theory) reliably demodulate them in the presence of sufficient power disparity, so that the combination could potentially lead to blind reception techniques for very high-capacity  ... 
doi:10.1109/5.720252 fatcat:exsvogy7mvcvrfscq67bewtdou

Fractionally spaced equalizers

J.R. Treichler, I. Fijalkow, C.R. Johnson
1996 IEEE Signal Processing Magazine  
Acknowledgment We wish to thank the multitudes at Applied Signal Technology, who played a role in the applications and products cited in this article, and all of the graduate students who participated  ...  in the Blind Equalization Research Group at Cornell University over the past few years.  ...  The presence of additive noise and interference has been ignored in much of our presentation.  ... 
doi:10.1109/79.489269 fatcat:5drnokseejfhfpbesob6pvimaa

Guest editorial - signal synchronization in digital transmission systems

M. Luise, U. Mengali, M. Moeneclaey, J.G. Proakis, E. Strom, W.H. Tranter
2001 IEEE Journal on Selected Areas in Communications  
In this way the demodulation of a given user is not affected by the presence of other users.  ...  Finally, Lu and Wang concentrate on the design of a blind receiver for coded OFDM systems in the presence of frequency offset and a frequency selective fading channel.  ... 
doi:10.1109/jsac.2001.974596 fatcat:gd425o5dmvailcg4crumc4ys5e

Applications Of Particle Filtering To Communications: A Review

Petar M. Djuric, Jianqiu Zhang, Tadesse Ghirmai, Yufei Huang, Jayesh Kotecha
2002 Zenodo  
Publication in the conference proceedings of EUSIPCO, Toulouse, France, 2002  ...  The objective of equalization is to estimate the transmitted symbols {bt} in presence of intersymbol interference with or without determination of the channel coefficients.  ...  Blind equalization When digital symbols {b t } are transmitted over a dispersive channel, intersymbol interference occurs and the received sampled signal can be represented as y t = L−1 k=0 b t−k h t,k  ... 
doi:10.5281/zenodo.53605 fatcat:q5saybtmkjalpe5mg7uvggsvmy

Bootstrapping Iterative Demodulation and Decoding Without Pilot Symbols

Simone Pecorino, Silvio Mandelli, Luca Barletta, Maurizio Magarini, Arnaldo Spalvieri
2015 Journal of Lightwave Technology  
Also, the complexity issue of trellis-based demodulation is addressed in the paper.  ...  The aim of the paper is to show that trellis-based demodulation can be used to bootstrap the iterative process without the need of pilot symbols.  ...  Prominent examples of channels with memory are the intersymbol interference channel, the phase noise channel, and the fading channel.  ... 
doi:10.1109/jlt.2015.2448109 fatcat:3ofll6wj2jfujkbd4jwfvc4dmq

Coded orthogonal frequency division multiplex [TV broadcasting]

B. Le Floch, M. Alard, C. Berrou
1995 Proceedings of the IEEE  
is under progress in the field of digital terrestrial TV.  ...  Thus an efficient baseband digital coding must be combined with a robust digital modulation and channel coding scheme that can meet the requirements of every mode of broadcast reception.  ...  Fig. 5 .Fig. 6 . 56 OFDWQAM intersymbol interference function without guard interval. ence of a guard interval. Fig. 7 . 7 OFDM/IOTA intersymbol interference function.  ... 
doi:10.1109/5.387096 fatcat:24ub6ooxofhgtjvhzpmt2cscgq

Filter Bank Multicarrier for Massive MIMO [article]

Arman Farhang, Nicola Marchetti, Linda E. Doyle, Behrouz Farhang-Boroujeny
2014 arXiv   pre-print
This paper introduces filter bank multicarrier (FBMC) as a potential candidate in the application of massive MIMO communication.  ...  Self-equalization, a property of FBMC in massive MIMO that is introduced in this paper, has the impact of reducing (i) complexity; (ii) sensitivity to carrier frequency offset (CFO); (iii) peak-to-average  ...  Spectrum of a subcarrier in a CMT system after demodulation to baseband, but before matched filtering. Note that interference from the remaining subcarriers is present.  ... 
arXiv:1402.5881v1 fatcat:jt3ziuf2zfa7xdpejza5suib74
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