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Coordinated Multi-Point MIMO Processing for 4G
Reis, C.; Correia, A.; Souto, N.; Silva, Mário Marques daThe concept of cooperative Multiple-Input-Multiple-Output (MIMO), also referred to as network MIMO, or as Coordinated Multi-Point Transmission (CoMP), was standardized in 3GPP Release 11. The goal of CoMP is to improve the coverage of high data rates and cell-edge throughput, and also to increase system throughput. In this paper we analyze only the latter scenario, using system level simulations in accordance w...
On Coordinated Multi-Point Transmission for Cellular Environments
Silva, Mário Marques da; Correia, Américo; Dinis, Rui; Montezuma, PauloCurrent and emergent services are demanding higher data rates, improved spectral e±ciency and increased network capacity. To face these new requirements, it is important to ¯nd schemes able to reduce the e®ects of fading and to exploit new types of diversity. Coordinated Multi-Point transmission (CoMP) comprises the coordinated transmission of signals from adjacent base stations (BS), and the corresponding rece...
Multiple Input Multiple Output System with Multi User Support Based on Directiv...
Carvalho, Paulo; Silva, Mário Marques da; Dinis, RuiLow interference and privacy are crucial requirements for system reliability and security. Present and further mobile communication systems must support multiple users achieving at same time low interference levels. Several solutions can be adopted to reduce interference between users, such as spreading codes or beam forming. For very high bit rates ¯rst solution must be discarded. On the other hand, in environ...
Receptor no Domínio da Frequência para Modulações SC-FDE com STBC
Silva, Mário Marques da; Dinis, Rui; Correia, AméricoSão apresentados métodos para suportar transmissões baseadas na técnica de Transmissão com Portadora Única, com Igualação no Domínio da Frequência (SC-FDE), utilizando diversidade de transmissão, com codificação no espaço e no tempo. O objectivo do sistema proposto consiste em permitir a difusão de informação a partir de terminais de comunicações móveis, conseguindo-se uma melhor eficiência de desempenho e/ou d...
Multimedia Communications and Networking
Silva, Mário Marques daThis book aims to present a detailed and comprehensive description of most important state-of-the-art fundaments and system details in the fields of multimedia, networking, digital communications, and network security. It describes several subjects which are key aspects in the development and understanding of the current and emergent services. The objective of this textbook is to concentrate in a single book t...
Transmission Techniques for 4G Systems
Silva, Mário Marques da; Correia, Américo; Dinis, Rui; Souto, Nuno; Silva, João CarlosFourth Generation wireless communication systems (4G) aim to allow peak data rates in the range of 1 Gbps for nomadic access and 100 Mbps for vehicular mobility. 4G aim to support current and emergent multimedia services, such as mobile TV, social networks and gaming, high definition television and video teleconference, multimedia messaging service, using the all over IP concept and with improved quality of ser...
Iterative Frequency-Domain Detection and Channel Estimation for Space-Time Bloc...
Silva, Mário Marques da; Dinis, RuiIn this paper, we consider iterative frequency-domain receivers for block transmission techniques with rate-1 space–time block coding (STBC) for two or four transmit antennas. Single carrier with frequency-domain equalisation (SC-FDE) combined with antenna diversity is a promising candidate for future broadband wireless systems. Because our STBC with four transmit antennas is not orthogonal, our receiver includ...
Transmission Techniques for Emergent Multicast and Broadcast Systems
Silva, Mário Marques da; Correia, Américo; Dinis, Rui; Souto, Nuno; Silva, João CarlosMultimedia Broadcast and Multicast Service (MBMS) as video broadcast or mobile television is intended to use spectrum-efficient multimedia services, by transmitting data over a common radio channel, where the bottleneck is placed to a large group of users. This book proposes and studies several advances in transmission techniques and receivers to support emergent wireless needs for MBMS requirements. These new...
Frequency-Domain Receivers for Rate-1 Space-Time Block Codes
Silva, Mário Marques da; Dinis, Rui; Correia, Américo M.C.This paper considers iterative frequency-domain receivers for block transmission techniques with rate-1 Space Time Block Coding (STBC) for two and four transmit antennas using both Orthogonal Frequency Division Multiplexing (OFDM) and Single-Carrier (SC) schemes. The proposed receiver includes an interference canceller which enhances the performance of the non-orthogonal STBC scheme with 4 transmit antennas, a...
On transmission techniques for multi-antenna W-CDMA systems
Silva, Mário Marques da; Correia, Américo M. C.; Dinis, RuiIn this paper we present and evaluate a new pre-processing scheme for Multiple Input Multiple Output (MIMO) channels. Its performance is compared with other MIMO schemes proposed for the downlink of Wideband-Code Division Multiple Access (W-CDMA) systems, namely a variation of the Beam Forming (BF), entitled Beam-Selective Transmit Diversity (BSTD) or post-processing schemes, such as the Alamouti-like MIMO or t...
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