Noisy index coding problem over a single-input single-output additive white Gaussian noise (AWGN) broadcast channel has been studied in [4]–[6]. For a given index coding problem with an order of priority among the receivers and a chosen index code of length N results have been reported only for symmetric PSK modulation. In this work we improve the performance of high priority receivers by transmitting the N bits using a rotated M-PSK $(M=2^{N}$) constellation where half the number of points are rotated by an angle $\theta$, where $0\leq\theta\lt 2\pi/M$. The results in [4]–[6] correspond to the case $\theta=0$. We show that the probability of error performance for the high priority receivers improve as $\theta$ increases and simultaneously that of the low priority receivers deteriorate. As a result the performance of some of the receivers in the middle of the priority order may remain unchanged.
Index Coded PSK Modulation with Rotated Constellation for Prioritized Receivers
01.06.2022
644110 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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Kraftfahrwesen | 1992
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