“…We use the first approach to implement asymmetrical modulation in this paper. All of the proposed asymmetrical modulations [8], [7], [13], [9] are only used for the transmission from BS to mobile devices for unequal error protection purpose. However in our work the asymmetrical modulation is applied for the transmission from a mobile device to the BS and the other mobile devices, i.e., two different types of recipients, with the same error protection.…”