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Closed-form symbol error rate expression of decode-and-forward relaying using orthogonal space-time block coding

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3 Author(s)
Yang, Q. ; State Key Lab. on ISN Sch. of Telecommun. Eng., Xidian Univ., Xi'an, China ; Kwak, K.S. ; Fu, F.

The authors investigate the symbol error rate (SER) performance of the cooperative decode-and-forward (DF) relaying strategy with orthogonal space-time block coding (OSTBC) applied at all links of source-relay, source-destination and relay-destination. Only when one relay node is able to correctly decode the OSTBC codeword of the source, it will forward source information to the destination with the same OSTBC codeword. The exact SER expressions of DF relaying with OSTBC are presented for M-PSK and M-QAM modulations, respectively, over dissimilar Rayleigh fading channels. By virtue of the multinomial theorem and the law of total probability, the derived expressions are further deduced in closed form. Simulations demonstrate the proposed closed-form analytical results. It is pointed out that such results have seldom appeared in literatures before.

Published in:

Communications, IET  (Volume:4 ,  Issue: 3 )