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Optimal power allocation in DS-CDMA with adaptive SIC technique.

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Titel: Optimal power allocation in DS-CDMA with adaptive SIC technique.
Autoren: Maity, Santi, Hati, Sumanta, Maji, Chinmay
Quelle: Telecommunication Systems; Jul2014, Vol. 56 Issue 3, p335-346, 12p
Schlagwörter: CHANNEL capacity (Telecommunications), WIRELESS communications, BINARY erasure channels (Telecommunications), CHANNEL spacing (Telecommunication), MATHEMATICAL analysis
Abstract: This paper proposes an optimal power allocation in direct sequence-code division multiple access (DS-CDMA) system. The objective is to minimize total transmit power, while simultaneously meeting the certain sum channel capacity (data transmission rate) and outage probability constraints on Rayleigh fading channel. Then a weighted correlator with an adaptive successive interference cancelation (SIC) scheme is developed using neural network (NN) for an improvement in receiver performance. A closed mathematical form of joint probability of error (JPOE) is derived. This determines the number of active users' interfering effect that needs to be canceled in order to achieve a desired bit error rate (BER) value. Mathematical analysis shows that better receiver performance can be achieved through large change in weight up-gradation ( w) for the strong users with a particular change in learning rate ( η). Simulation results in terms of sum capacity as well as weak user's (users with poor channel gain) capacity, outage probability and BER performance duly support the effectiveness of the proposed scheme over the existing works. [ABSTRACT FROM AUTHOR]
Copyright of Telecommunication Systems is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Optimal power allocation in DS-CDMA with adaptive SIC technique.
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  Data: This paper proposes an optimal power allocation in direct sequence-code division multiple access (DS-CDMA) system. The objective is to minimize total transmit power, while simultaneously meeting the certain sum channel capacity (data transmission rate) and outage probability constraints on Rayleigh fading channel. Then a weighted correlator with an adaptive successive interference cancelation (SIC) scheme is developed using neural network (NN) for an improvement in receiver performance. A closed mathematical form of joint probability of error (JPOE) is derived. This determines the number of active users' interfering effect that needs to be canceled in order to achieve a desired bit error rate (BER) value. Mathematical analysis shows that better receiver performance can be achieved through large change in weight up-gradation ( w) for the strong users with a particular change in learning rate ( η). Simulation results in terms of sum capacity as well as weak user's (users with poor channel gain) capacity, outage probability and BER performance duly support the effectiveness of the proposed scheme over the existing works. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Telecommunication Systems is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11235-013-9847-2
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        Text: English
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        PageCount: 12
        StartPage: 335
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      – SubjectFull: CHANNEL capacity (Telecommunications)
        Type: general
      – SubjectFull: WIRELESS communications
        Type: general
      – SubjectFull: BINARY erasure channels (Telecommunications)
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      – SubjectFull: CHANNEL spacing (Telecommunication)
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      – SubjectFull: MATHEMATICAL analysis
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      – TitleFull: Optimal power allocation in DS-CDMA with adaptive SIC technique.
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              Text: Jul2014
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