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In constellation rearrangement (CoRe), the base-station and the relay use different constellations, with the same number of signal points, to communicate with the user terminal. In contrast to the existing CoRe techniques, which restrict the possible constellations, we propose generalized quadrature amplitude modulation (QAM) constellations. Since generalized CoRe schemes do not restrict constellations,...
Hop adaptive MAC-PDU (Protocol Data Unit) size optimization is proposed for Orthogonal Frequency Division Multiple Access (OFDMA) based wireless relay networks. Such optimization improves the end-to- end goodput via MAC-PDU size optimization. We provide design and evaluation for two hop cellular networks with fixed relays where the Base Station (BS) to Relay Station (RS) links are potentially robust...
In this paper, we consider the downlink scenario of a cellular cooperative OFDM network, in which the vacant user in the cell could serve as relay for the base station and forward the downlink data streams. With the channel information of the users in the cell, the base station not only allocates the power and subchannels to the users, but also decides the relay strategy for each subchannel. We derive...
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