Blind adaptive decorrelating detector for DS-CDMA systems: auxiliary-vector detector

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Blind adaptive decorrelating detector for DS-CDMA systems: auxiliary-vector detector

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A blind adaptive decorrelating detector is proposed which consists of two vectors: one is the pre-assigned spreading code of the desired user and the other is orthogonal to it. The orthogonal vector is adjusted adaptively to minimise the multiple access interference (MAI). This blind adaptive detector requires no more knowledge than does the conventional single-user receiver. Simulation results show that the obtained performance is close to that of the decorrelator.

Inspec keywords: code division multiple access; interference (signal); decorrelation; spread spectrum communication; adaptive signal detection

Other keywords: orthogonal vector; multiple access interference; blind adaptive decorrelating detector; pre-assigned spreading code; auxiliary-vector detector; DS-CDMA systems

Subjects: Signal detection; Multiple access communication; Electromagnetic compatibility and interference

References

    1. 1)
      • Zecevic, N., Reed, J.H.: `Blind adaptation algorithms for direct-sequence spread-spectrum CDMAsingle-user detection', IEEE Int. Vehicular Technology Conf., May 1997, p. 2133–2137.
    2. 2)
      • Ulukus, S., Yates, R.D.: `A blind adaptive decorrelating detector for CDMA systems', Proc. 1997 IEEE Global Telecommunications Conf., Nov. 1997, p. 664–668.
    3. 3)
      • M. Honig , U. Madhow , S. Verdu . Blind adaptive multiuser detection. IEEE Trans. , 944 - 960
    4. 4)
      • Lupas , S. Verdu . Linear multiuser detectors for synchronous code-division multiple-accesschannel. IEEE Trans. , 1 , 123 - 136
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