Blind estimation of multicarrier CDMA sub-carrier frequencies based on the high-order cyclic cumulants

  • Authors:

  • Yu Zhiming;Guo Lili;Qi Lin

  • Affiliations:

  • College of Information and Communication Engineering, Harbin Engineering University, Harbin, China;College of Information and Communication Engineering, Harbin Engineering University, Harbin, China;College of Information and Communication Engineering, Harbin Engineering University, Harbin, China

  • Venue:
  • WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
  • Year:
  • 2009

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Abstract

This paper proposed a method to estimate sub-carriers frequencies of multi-carrier CDMA signals utilizing higher-order cyclic cumulants, based on the cyclic stationary characteristic of multi-carrier CDMA signals. Because higher-order cyclic cumulants can effectively suppress stationary noise and non-stationary Gaussian noise, through theoretical analysis, we can prove that the higher-order cyclic cumulant of the multi-carrier CDMA signal using BPSK/QPSK modulation only exist in the cycle frequency of sub-carrier frequency under the above noise background, so it can estimate the sub-carrier frequencies of multi-carrier CDMA signals by detecting the peaks of cyclic frequencies. Theoretical analysis and simulation results have verified the correctness and effectiveness of the algorithm.