CorrectionS to &amp;#8220;Blind Adaptive DS/CDMA Receivers for Multipath and Multiuser Environments&amp;#8221;

Ueng, Fang‐Biau; Chen, J.-D.; Tsai, Shang-Chun; Chen, P.Y.

doi:10.1109/tcsi.2006.873917

Cited by 3 publications

(4 citation statements)

References 1 publication

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“…Afterward, the recursive equation of the filter's weight for the proposed receiver is derived. The similar derivation for blind DS-CDMA receiver can be referred in [12,13]. From (10), the Lagrangian cost function can be shown as follows:…”

Section: Constrained Despreadermentioning

confidence: 99%

“…The constrained optimization problem can be converted into an unconstrained form by using the GSC decomposition [5,13,37] …”

Section: Constrained Despreadermentioning

confidence: 99%

“…The blind adaptive equalizations of multiuser CDMA systems have been examined in many literatures, e.g., in [3][4][5][6][7][8][9][10][12][13][14]. However, the blind detections of MC-CDMA systems were discussed merely in a few papers, e.g., [15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Adaptive constrained CM-based multicarrier-CDMA receivers in multipath fading channels

Chen

Shen

2013

J Wireless Com Network

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Two blind adaptive receivers, based on constrained constant modulus (CM) algorithms, are investigated for the detection of the multicarrier code division multiple access (MC-CDMA) system in the multiuser and multipath channels. As the data rate of the information bit is getting high enough, the transmitted signal of the MC-CDMA system becomes more sensitive to the frequency-selective fading. To mitigate this drawback, the parallel transmissions of multiple data symbols within one OFDM block are employed in the proposed systems to ensure that the length of the cyclic prefix (CP) is longer than the delay spread of the multipath channel. The first receiver is called a full-tap receiver (TDes receiver), which can carry out the interference suppression in the frequency-domain. Alternatively, a reduced-tap receiver (TRTap) is proposed on the basis of the derived cyclically shifting matrix. According to the derived matrix representation of the received signal, the analytical steady-state mean square errors (MSEs) for both receivers are also derived and compared. Simulation results are provided to illustrate the effectiveness of the proposed receivers and validate the accuracy of the theoretical analysis. As expected, the symbol error rate (SER) performance of the full-tap receiver is better than that of the reduced-tap receiver in severe interference environments. In contrast, the reduced-tap receiver can provide the satisfied SER performance just like the full-tap receiver in low-interference scenarios, even though the former one adopts only one-tap equalization.

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Section: Constrained Despreadermentioning

confidence: 99%

“…The constrained optimization problem can be converted into an unconstrained form by using the GSC decomposition [5,13,37] …”

Section: Constrained Despreadermentioning

confidence: 99%

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Adaptive constrained CM-based multicarrier-CDMA receivers in multipath fading channels

Chen

Shen

2013

J Wireless Com Network

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“…In this paper, three adaptive blind receivers based on the variance‐oriented approach (VOA) are proposed. The proposed receivers are derived on the basis of complex signals and complex channels.…”

Section: Introductionmentioning

confidence: 99%

Adaptive blind receivers for MC-CDMA communication systems

Chen

Ueng

Chen

2012

Wirel. Commun. Mob. Comput.

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In this paper, we propose three adaptive blind algorithms for multiuser multicarrier code division multiple-access systems in multipath fading channels. The proposed adaptive blind receivers are based on the property of the discreteness of the input data symbol and are updated in every symbol interval. We also use the concept that the variance of the output signal approaches to the variance of the desired signal to get the cost function. The three proposed receiver structures are the traditional finite impulse response (FIR) structure, the despreading (DES) filter structure and the generalized sidelobe canceller (GSC) structure. The advantage of the FIR filter is that the length of the filter weights does not have to be the same length as the spreading code. For the DES filter, the combination of the adaptive weight and the despreading code has the simplest structure than the other two proposed receiver structures. The constrained GSC filter is superior to the other two proposed receiver structures in the environments dominated by multiple-access interference. By this constraint, the blind GSC filter can guarantee to converge to the desired solution. Simulation results are given to show the effectiveness and comparison of the proposed adaptive blind receivers.

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Robust Constant Modulus Algorithms

2018

Simplified Robust Adaptive Detection and Beamforming for Wireless Communications

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CorrectionS to “Blind Adaptive DS/CDMA Receivers for Multipath and Multiuser Environments”

Cited by 3 publications

References 1 publication

Adaptive constrained CM-based multicarrier-CDMA receivers in multipath fading channels

Adaptive constrained CM-based multicarrier-CDMA receivers in multipath fading channels

Adaptive blind receivers for MC-CDMA communication systems

Robust Constant Modulus Algorithms

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