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Probability of error for noncoherent M-ary orthogonal FSK with postdetection switched combining

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2 Author(s)
Simon, Marvin K. ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Alouini, M.-S.

The paper extends the notion of postdetection switched combining introduced by the authors to M-ary orthogonal modulation (Alouini and Simon, ibid., p.1591-1602, 2003) and proceeds to analyze and evaluate its average bit-error rate performance for the dual-branch case. The particular variation chosen for the switching strategy uses a different model than that previously used for the binary case and although it results in a slightly poorer performance, it nevertheless outperforms conventional (predetection) switched combining for all values of M. Results are obtained for a variety of popular channel models including Rayleigh, Rician, and Nakagami-m fading. Because of its relative simplicity of implementation, the proposed scheme once again offers a very attractive low-complexity solution for mitigating the deleterious effects of multipath fading.

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Communications, IEEE Transactions on  (Volume:51 ,  Issue: 9 )