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Tn this paper we consider the use of hierarchical QAM constellations (quadrature amplitude modulation) for multimedia broadcast/multicast service (MBMS) within WCDMA-based systems (wideband code division multiple access). The constellations are incorporated into HS-DSCH (high speed downlink shared channel) of UMTS (universal mobile telecommunications system). They are employed so as to increase transmission...
Among radio technologies, multiple-input multiple-output (MIMO) systems have attracted wide research interests in recent years. It is widely recognized that MIMO systems can be employed for achieving a high capacity and a high diversity order, for mitigating the effects of various types of interfering signals, and for supporting space-division multiple-access (SDMA). In this study a MIMO assisted...
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