Um estudo da probabilidade de erro de símbolo da modulação TQAM nos canais AWGN e de Rayleigh

Abstract

In the receiver of the mobile radio links, the signal resultant is constituted by various signals with different amplitudes, phases and delays corresponding to the different propagation paths. The propagation multi-path results in fading and to mitigate the effect of fading are techniques are used to stabilize the link and thus improve channel performance. One of the techniques described in the literature is the spatial diversity in reception with single input multiple outputs (SIMO - Single Input Multiple Output). To implement this spatial diversity technique, was used the maximum ratio combination (MRC -Maximum Ratio Combination). In this scenario of digital signal transmission, this work studied the performance of M-TQAM modulation in noise and fading channels. The conclusions were that the triangular constellation performs similarly to the square constellation and that there is less demand for SNR when the number of reception channels increases