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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Low PAPR space frequency block coding for multiuser MIMO SC-FDMA systems: specific issues for users with different spectral allocations | Ciochina et al. EURASIP Journal on Advances in Signal Processing 2011 2011 54 http asp.eurasipjournals.eom content 2011 1 54 o EURASIP Journal on Advances in Signal Processing a SpringerOpen Journal RESEARCH Open Access Low PAPR space frequency block coding for multiuser MIMO SC-FDMA systems specific issues for users with different spectral allocations Cristina Ciochina David Mottier and Damien Castelain Abstract Single-carrier space frequency block coding SC-SFBC is an innovative mapping scheme suitable for implementing transmit diversity in single-carrier frequency division multiple access SC-FDMA systems. The main advantage of SC-SFBC is that it preserves the low envelope variations of SC-FDMA which is particularly interesting for the uplink of wireless communications systems. In this article we apply the SC-SFBC concept in a multiuser multiple-input multiple-output MU-MIMO scenario. We introduce a novel algorithm allowing the optimization of the parameters of SC-SFBC to enable low-complexity decoding at the receiver side and to maximize the overall spectral occupancy in MU-MIMO SC-FDMA systems and we show the good performance of the proposed MU scheme. Keywords SC-FDMA transmit diversity single-carrier space frequency block coding multi-user MIMO peak to average power ratio. 1. Introduction Orthogonal frequency division multiple access OFDMA and OFDMA-based multi-carrier MC transmission schemes have undeniably become one of the main references in modern communications systems. Almost all recent communication standards rely on an OFDMA downlink air interface and implement multiple-input multiple-output MIMO techniques 1 . Such is the case in IEEE 802.11n for wireless local area networks IEEE 802.16e-2005 for mobile WiMAX LongTerm Evolution LTE of Universal Mobile Telecommunications System and also in the future LTE-advanced standard. The general acceptance of OFDMA as a good option for the downlink of recent communications systems is motivated by its well-known
