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Reduced complexity serial interference cancellation for CDMA receivers

Reduced complexity serial interference cancellation for CDMA receivers

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A method to significantly reduce the computational complexity of a serial interference cancellation scheme for CDMA receivers, while maintaining the receiver performance, is presented. The reduced complexity is achieved by accelerating the convergence rate of the algorithm with a preconditioning technique.

Inspec keywords: computational complexity; interference suppression; radio receivers; convergence of numerical methods; code division multiple access

Other keywords: preconditioning technique; computational complexity reduction; code division multiple access; CDMA receivers; convergence rate acceleration; serial interference cancellation

Subjects: Radio links and equipment; Electromagnetic compatibility and interference; Multiple access communication

References

    1. 1)
      • Elders-Boll, H., Schotten, H.D., Busboom, A.: `Implementation of linear multiuser detectors for asynchronous CDMA systems by linear multi-stage interference cancellation', Proc. of 1998 IEEE Int. Conf. on Acoustics, Speech and Signal Processing, 1998, 6, p. 3225–3228.
    2. 2)
      • Peng Hui, Tan: `Box-constrained maximum-likelihood detection in CDMA', Proc. of Int. Sem. on Broadband Communication, 2000, Zurich, Switzerland, p. 55–62.
    3. 3)
      • D. Divsalar , K. Simon , D. Raphaeli . Improved parallel interference cancellation for CDMA. IEEE Trans. Commun. , 258 - 268
    4. 4)
      • 3GPP specifications 25.221–25.225.
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