Joint base station assignment, power control error, and adaptive beamforming for DS-CDMA cellular systems in multipath fading channels

Dosaranian‐Moghadam, Mohamad; Bakhshi, Hamidreza; Dadashzadeh, Gholamreza; Godarzvand-Chegini, M.

doi:10.1109/gmc.2010.5634559

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…Using the estimated angle of signals arrival, this system form the main lobe of the antenna toward the desired signal and nulls on the direction of interferences. It enhances the quality of received desired signal, suppresses all interfering signals, increases spectrum efficiency, extends range coverage, and enlarges capacity [8,9]. Recently, different research works have been presented which combine antenna beamforming and RAKE receiver for WCDMA applications.…”

Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

“…Reference [9] uses conjugate gradient (CG) adaptive beamforming for space diversity processing in each RAKE finger in a DS-CDMA. This paper improves network bit error rate (BER) and capacity of the system, using base-station assignment method based on minimizing the transmitter power (BSA-MTP) technique and power control error (PCE) in comparison with the conventional case, and adaptive beamforming passes the desired users' signal in an arbitrary path.…”

Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

See 1 more Smart Citation

A New Combination of RAKE Receiver and Adaptive Antenna Array Beamformer for Multiuser Detection in WCDMA Systems

Moghaddam

Sadeghi

2011

International Journal of Antennas and Propagation

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The aim of this paper is to combine smart antenna beamforming and RAKE receiver in wideband code division multiple access (WCDMA). The proposed method combines spatial diversity as well as temporal diversity to improve the performance and overcome both interferences and multipath fading. This investigation has focused on one of the new proposed blind beamforming algorithms. It is based on constrained constant modulus (CCM) algorithm which is used for deriving a recursive-least-squares (RLS-) type optimization algorithm. We illustrate the comparison of bit error rate (BER) of the proposed receiver with simple correlator and also 1D-RAKE receiver in multiuser detection (MUD) WCDMA. The simulation results show that the proposed 2D-RAKE receiver offers lower BER rather than conventional ones, that is, it is an effective solution for decreasing the effect of interference and increasing the capacity, in a joint state.

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Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

A New Combination of RAKE Receiver and Adaptive Antenna Array Beamformer for Multiuser Detection in WCDMA Systems

Moghaddam

Sadeghi

2011

International Journal of Antennas and Propagation

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“…In [7]- [10], we proposed the SSPC algorithm in DS-CDMA cellular systems in multipath fading channels without considering the PCE. In [11], we considered the joint SSPC algorithm, adaptive beamforming, and PCE over multipath fading. In [12], we considered DS-CDMA systems performance with base station assignment, PCE, and beamforming in the presence of frequency-selective Rayleigh fading channel.…”

Section: Introductionmentioning

confidence: 99%

Reverse Link Performance of DS-CDMA Cellular Systems through Closed-Loop Power Control and Beamforming in 2D Urban Environment

Dosaranian‐Moghadam¹,

Bakhshi²,

Dadashzadeh³

2010

IJCNC

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“…On the other hand, the issue of the effect of power control errors on wireless networks has received a great deal of attention over the last few years [2,3]. Finally, we consider the effect of PCE on wireless networks in a 2D urban environment [10].…”

Section: Introductionmentioning

confidence: 99%

Joint Closed-Loop Power Control and Adaptive Beamforming for Wireless Networks with Antenna Arrays in a 2D Urban Environment

Moghadam

Bakhshi

Dadashzadeh

2010

WSN

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The interference reduction capability of antenna arrays and the power control algorithms have been considered separately as means to decrease the interference in wireless communication networks. In this paper, we propose smart step closed-loop power control (SSPC) algorithm in wireless networks in a 2D urban environment with constrained least mean squared (CLMS) algorithm. This algorithm is capable of efficiently adapting according to the environment and able to permanently maintain the chosen frequency response in the look direction while minimizing the output power of the array. Also, we present switched-beam (SB) technique for enhancing signal to interference plus noise ratio (SINR) in wireless networks. Also, we study an analytical approach for the evaluation of the impact of power control error (PCE) on wireless networks in a 2D urban environment. The simulation results indicate that the convergence speed of the SSPC algorithm is faster than other algorithms. Also, we observe that significant saving in total transmit power (TTP) are possible with our proposed algorithm. Finally, we discuss three parameters of the PCE, number of antenna elements, and path-loss exponent and their effects on capacity of the system via some computer simulations

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Joint base station assignment, power control error, and adaptive beamforming for DS-CDMA cellular systems in multipath fading channels

Cited by 8 publications

References 18 publications

A New Combination of RAKE Receiver and Adaptive Antenna Array Beamformer for Multiuser Detection in WCDMA Systems

A New Combination of RAKE Receiver and Adaptive Antenna Array Beamformer for Multiuser Detection in WCDMA Systems

Reverse Link Performance of DS-CDMA Cellular Systems through Closed-Loop Power Control and Beamforming in 2D Urban Environment

Joint Closed-Loop Power Control and Adaptive Beamforming for Wireless Networks with Antenna Arrays in a 2D Urban Environment

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