S + N Energy selection combining for BPSK signaling in Rayleigh fading channels

  • Authors:

  • Young Gil Kim;Norman C. Beaulieu

  • Affiliations:

  • Department of Electrical and Computer Engineering, University of Seoul, Seoul, Korea;Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada

  • Venue:
  • IEEE Transactions on Communications
  • Year:
  • 2010

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Abstract

A signal-plus-noise (S + N) energy selection combining (S + N-ESC) scheme and a weighted S + N-ESC scheme for binary phase shift keying (BPSK) signaling are studied. The S + N-ESC selects the branch with the maximum S + N energy for detection. The advantage of the S + N-ESC and the weighted S + N-ESC is that they require no explicit channel estimation for diversity branch selection. The bit error rate (BER) performances of the S + N-ESC and the weighted S + N-ESC are analyzed for BPSK signaling in independent and nonidentically distributed (i.n.d.) Rayleigh fading channels. We show that the average error rate performance of the S + N-ESC is the same as classical signal-to-noise ratio selection combining (SNR-SC), which requires the estimation of fading amplitudes for branch selection, in independent and identically distributed (i.i.d.) Rayleigh fading channels. We also show that the weighted S + N-ESC has the same BER performance as the classical SNR-SC for i.n.d. Rayleigh fading channels.