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This paper evaluates the bit-error rate and spectral efficiency performance provided by the convolutional coded Quadrature Amplitude Modulation (QAM) configurations whose global rates are modified mainly by changing the numbers of code and non-coded bits mapped on a QAM symbol. The Bit Error Rate (BER) performance provided are compared to the ones of the convolutional coded modulations which map only...
In this paper, we derive the averaged bit and symbol error probabilities as approximated closed-forms for M-ary quadrature amplitude modulation (MQAM) burst transmission of adaptive decode-and-forward (ADF) relay systems over quasi-static Rayleigh fading channels. Within a burst, there are pilot symbols and data symbols. Pilot symbols are used for channel estimation schemes and each relay node's transmission...
This article investigates the efficacy of a constant-power, rate-adaptive M-QAM transmission technique in amplify-and-forward cooperative wireless networks. Tight upper and lower bounds are derived for the mean achievable spectral efficiency, outage probability, and error probability performance of non-regenerative cooperative relay networks in Nakagami-m fading environments. We observe that the spectral...
This paper uses a simple closed-form technique for the computation of the symbol error rate or bit error rate for the performance of coherent M-ary digital modulation schemes over Nakagami-m fading, Rician fading and perturbed by additive white gaussian noise . The expressions for the symbol error probability or bit error probability are simple and include Gauss hypergeometric functions which can...
A new transmission approach, referred to as subcarrier-index modulation (SIM) is proposed to be integrated with the orthogonal frequency division multiplexing (OFDM) systems. More specifically, it relates to adding an additional dimension to the conventional two-dimensional (2-D) amplitude/phase modulation (APM) techniques, i.e. amplitude shift keying (ASK) and quadrature amplitude modulation (QAM)...
In this paper we derive optimal power allocation (PA) in space and time that minimizes BER for transmitter selection in multi-input-single-output (MISO) Rayliegh fading channels assuming perfect channel state information (CSI) is available at receiver and transmitter. This power allocation scheme achieves exponential diversity order with a single RF front end and requires feedback of the best channel...
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