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592
New Detection Methods of DS-CDMA Signal at Lower
"... Abstract—DS-CDMA in the modern civil and military communications is widely used. Due to its low power spectral density, the DS-CDMA signal always floods in the background noise, bringing difficulties to the signal’s reconnaissance. Therefore, DS-CDMA signal detection has attracted attention of resea ..."
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Abstract—DS-CDMA in the modern civil and military communications is widely used. Due to its low power spectral density, the DS-CDMA signal always floods in the background noise, bringing difficulties to the signal’s reconnaissance. Therefore, DS-CDMA signal detection has attracted attention
Successive Blind Detection of DS/CDMA Signals
, 2002
"... This paper provides an investigation into the performance of a multi-stages constant-modulus filter/ signal canceller (CMA/SC) for blind detection of direct sequence/code code division multipleaccess (DS/CDMA) signals over additive white Gaussian noise (AWGN) channels. A simple stochastic gradient a ..."
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This paper provides an investigation into the performance of a multi-stages constant-modulus filter/ signal canceller (CMA/SC) for blind detection of direct sequence/code code division multipleaccess (DS/CDMA) signals over additive white Gaussian noise (AWGN) channels. A simple stochastic gradient
Blind Deconvolution of DS-CDMA Signals by Means of Decomposition in . . .
, 2008
"... In this paper, we present a powerful technique for the blind extraction of direct-sequence code-division multiple access (DS-CDMA) signals from convolutive mixtures received by an antenna array. The technique is based on a generalization of the canonical or parallel factor decomposition (CANDECOMP/ ..."
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Cited by 9 (3 self)
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In this paper, we present a powerful technique for the blind extraction of direct-sequence code-division multiple access (DS-CDMA) signals from convolutive mixtures received by an antenna array. The technique is based on a generalization of the canonical or parallel factor decomposition (CANDECOMP
AN ALGEBRAIC TECHNIQUE FOR THE BLIND SEPARATION OF DS-CDMA SIGNALS
"... In this paper, we propose a new deterministic technique for the blind separation of DS-CDMA signals received on an antenna array. We start from the observation made by Sidiropoulos et al. that the re-ceived data exhibit the structure of a Canonical Decomposition in multilinear algebra. We provide a ..."
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In this paper, we propose a new deterministic technique for the blind separation of DS-CDMA signals received on an antenna array. We start from the observation made by Sidiropoulos et al. that the re-ceived data exhibit the structure of a Canonical Decomposition in multilinear algebra. We provide a
Deterministic Semi-Blind Detection of Quasi-Synchronous DS/CDMA Signals . . .
, 2002
"... A deterministic semi-blind detector for quasi-synchronous DS/CDMA signals is proposed. The detector makes use of an antenna army for semi-blind separation and detection of the various users' signals in multipath environment. It is shown, through computer simulations, that the detector performs ..."
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A deterministic semi-blind detector for quasi-synchronous DS/CDMA signals is proposed. The detector makes use of an antenna army for semi-blind separation and detection of the various users' signals in multipath environment. It is shown, through computer simulations, that the detector performs
Tracking of Time Hopped DS-CDMA Signals for Pseudolite-based Positioning
, 2009
"... Locata’s positioning technology was designed to be used as an alternative to GNSS in classically-difficult GNSS signal environments. A network of time-synchronized terrestrial transceivers (LocataLites) forms a positioning network (LocataNet) that can operate entirely independent of GNSS. Operating ..."
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Cited by 2 (2 self)
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in the 2.4GHz ISM licence-free band, the Pseudolite Positioning System (PPS) is immune to the near-far problem due to the usage of TH/DS-CDMA signal. Conversely, the use of such signals results in the degradation of code tracking performance in comparison to an equivalent DS-CDMA system. The relative
An Iterative Detection Technique for DS-CDMA Signals with Strong Nonlinear Distortion Effects
"... several components associated to different spreading codes (e.g., the DS-CDMA signal to be transmitted by the BS (Base Station) in the downlink, or any multicode DS-CDMA signal), it has high envelope fluctuations, and a high PMEPR (Peak-to-Mean Envelope Power Ratio) setting strong linearity requirem ..."
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Cited by 1 (1 self)
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several components associated to different spreading codes (e.g., the DS-CDMA signal to be transmitted by the BS (Base Station) in the downlink, or any multicode DS-CDMA signal), it has high envelope fluctuations, and a high PMEPR (Peak-to-Mean Envelope Power Ratio) setting strong linearity
Propagation Delay Estimation of Fading DS-CDMA Signals
"... In this paper we consider the problem of estimating the propagation delays of the transmitted signals in an asynchronous direct-sequence code division multiple access (DSCDMA) system operating over a fading channel. Two estimators based on subspace techniques are compared and the Cram'er-Rao Bo ..."
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'er-Rao Bound, a lower bound on the variance of any unbiased estimator, is derived. Special attention is paid to the near-far problem. 1 Introduction Due to the nature of the code waveforms typically used in DS-CDMA systems, accurate propagation delay estimation is important. See, for instance, [7], in which
Support Vector Machine Multiuser Receiver for DS-CDMA Signals in Multipath Channels
- IEEE Trans. Neural Networks
, 2000
"... The problem of constructing an adaptive multiuser detector (MUD) is considered for direct-sequence code-division multiple-access (DS-CDMA) signals transmitted through multipath channels. The emerging learning technique, called support vector machines (SVMs), is proposed as a method of obtaining a no ..."
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Cited by 42 (14 self)
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The problem of constructing an adaptive multiuser detector (MUD) is considered for direct-sequence code-division multiple-access (DS-CDMA) signals transmitted through multipath channels. The emerging learning technique, called support vector machines (SVMs), is proposed as a method of obtaining a
1 FREQUENCY-DOMAIN EQUALIZATION FOR ANTENNA DIVERSITY RECEPTION OF DS-CDMA SIGNALS
"... A coherent rake combiner is employed as the channel matched filter in a DS-CDMA mobile radio. However, as the number of propagation paths increases, the coherent rake receiver incurs a serious degradation in the bit error rate (BER) performance due to severe inter-path interference (IPI). In this pa ..."
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). In this paper, frequency-domain equalization employed in multi-carrier code division multiple access (MC-CDMA) is applied to achieve the frequency diversity effect while suppressing IPI for the antenna diversity reception of DS-CDMA signals. The BER performance improvement in a frequency-selective Rayleigh
Results 1 - 10
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592
