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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...
As the M-ary signaling scheme is mapping of N bits information to M signal elements, M has to be generally represented as 2 to Nth power (2N), which results in degrading the degree of freedom of a system design. In this paper, we introduce an encoding method of the M-ary signal with an arbitrary rational number by grouping two different M-ary signals. It enables us to choose M freely to satisfy a...
In this paper, we assess the random coding error exponents (EEs) corresponding to decode-and-forward (DF), compress-and-forward (CF) and quantize-and-forward (QF) relaying strategies for a parallel relay network (PRN), consisting of a single source and two relays. Moreover, through numerical analysis we show that the EEs achieved by using QF relaying along with non-Gaussian signaling (coded modulation,...
A signal space diversity (SSD) scheme combined with Alamouti coding is investigated to achieve more diversity gain in fading channels. By approximating noise as a Gaussian distribution after Alamouti decoding, an exact expression for the SER for SSD schemes with Alamouti coding in Rayleigh fading channels can be derived for 4-QAM and 16-QAM. Using the formula derived by using upper bound approach,...
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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