Wireless Communications and Mobile Computing / 2018 / Article / Fig 8

Research Article

Rate-Adaptive Multiple Access for Uplink Grant-Free Transmission

Figure 8

Illustrations of RAMA amenable constellations, which are constructed by the overlapping method. and are the power coefficients for each of the base constellations, and is the rotation angle vector.
(a) 2 bits per symbol
(b) 3 bits per symbol