Encontrados 21 documentos, a visualizar página 1 de 3
Reduced complexity detection in MIMO systems with SC-FDE modulations and iterat...
Ribeiro, Filipe Casal; Guerreiro, João; Dinis, Rui; Cercas, Francisco; Silva, AdãoThis paper considers a Multiple-Input Multiple-Output (MIMO) system with P transmitting and R receiving antennas and different overall noise characteristics on the different receiver antennas (e.g., due to nonlinear effects at the receiver side). Each communication link employs a Single-Carrier with Frequency-Domain Equalization (SC-FDE) modulation scheme, and the receiver is based on robust iterative frequency...
Nonlinear Effects of Radio over Fiber Transmission in Base Station Cooperation ...
Casal Ribeiro, Filipe; Guerreiro, João; Dinis, Rui; Cercas, Francisco; Silva, Adão; Pinto, ArmandoIn this paper we consider the uplink of Base Station (BS cooperation) systems, where each Mobile Terminal (MT) employs a Single-Carrier with Frequency-Domain Equalization (SC-FDE) modulation scheme. The combined signals at each BS are detected and/or separated by a Central Processing Unit (CPU) with Iterative Block Decision Feedback Equalization (IBDFE) receivers. We consider a Radio-over-Fiber (RoF) link betwe...
Robust receivers for base station cooperation systems
Dinis, Rui; Ribeiro, Filipe Casal; Guerreiro, João; Cercas, Francisco; Silva, Adãon BS (Base Station) cooperation architectures the MTs (Mobile Terminals) in adjacent cells can operate in the same frequency, with the signal's separation and/or MTs detection being performed by a CPU (Central Processing Unit). This results in a substantial improvement in the overall system's capacity and spectral efficiency when compared to conventional cellular systems. To decrease the data load in the backha...
Robust Receivers for Base Station Cooperation Systems
Casal Ribeiro, Filipe; Guerreiro, João; Dinis, Rui; Silva, Adão; Cercas, FranciscoIn BS (Base Station) cooperation architectures the MTs (Mobile Terminals) in adjacent cells can operate in the same frequency, with the signal's separation and/or MTs detection being performed by a CPU (Central Processing Unit). This results in a substantial improvement in the overall system's capacity and spectral efficiency when compared to conventional cellular systems. To decrease the data load in the backh...
Analytical BER Performance Evaluation in SISO and MIMO Environments with SC-FDE...
Dinis, Rui; Ribeiro, Filipe Casal; Cercas, Francisco; Silva, AdãoThis paper presents the analysis of the obtainment of the theoretical bit error rate (BER) performance in single-input–single-output and multiple-input–multiple-output systems with single-carrier with frequency-domain equalization modulations and iterative receivers based on the iterative block decision feedback equalization concept. Through the consideration of a Gaussian-based approach to obtain the BER perfo...
Multiuser detection for the uplink of clustered 5G systems with universal frequ...
Dinis, Rui; Ribeiro, Filipe Casal; Cercas, Francisco; Silva, AdãoWith 5G (Fifth generation) cellular communications, systems have to be able to cope with a massive increase of mobile devices and services and simultaneously improve the system’s spectral efficiency, as well as dealing with high interference levels. Base Station (BS) cooperation architectures jointly with block transmission techniques, such as OFDM (Orthogonal Frequency Division Multiplexing) for the downlink a...
Generalized LUI Propagation Model for UAVs Communications Using Terrestrial Cel...
Tavares, Tiago; Sebastião, Pedro; Souto, N.; Velez, Fernando J.; Cercas, Francisco; Ribeiro, Marco; Correia, AmericoThis work proposes an empirical propagation model to obtain the path loss, and therefore determine the average received power, of a signal for a specific outdoor urban scenario with UAVs. The proposed 3D propagation model for terrestrial cellular networks generalizes the LUI model and is valid in the frequency ranges from GSM, UMTS and LTE technologies. We report experimental work in 3D space, considering the h...
Receiver design for the uplink of base station cooperation systems employing SC...
Dinis, Rui; Ribeiro, Filipe Casal; Cercas, Francisco; Silva, AdãoThe presented paper considers the uplink transmission in base station (BS) cooperation schemes where mobile terminals (MTs) in adjacent cells share the same physical channel. We consider single-carrier with frequency-domain equalization (SC-FDE) combined with iterative frequency-domain receivers based on the iterative block decision feedback equalization (IB-DFE). We study the quantization requirements when sen...
Receiver design for the uplink of base station cooperation systems employing SC...
Ribeiro, Filipe Casal; Dinis, Rui; Cercas, Francisco; Silva, AdãoThe presented paper considers the uplink transmission in base station (BS) cooperation schemes where mobile terminals (MTs) in adjacent cells share the same physical channel. We consider single-carrier with frequency-domain equalization (SC-FDE) combined with iterative frequency-domain receivers based on the iterative block decision feedback equalization (IB-DFE). We study the quantization requirements when sen...
Error rate analysis of M-PSK with magnitude modulation envelope control
Dinis, Rui; Gomes, Marco; Silva, Vitor; Tomlinson, M.; Cercas, FranciscoMagnitude modulation (MM) envelope control is an efficient way of reducing the peak-to-average power ratio (PAPR) of single-carrier (SC) signals and improves an SC system's overall power efficiency. However, MM techniques reduce the PAPR at the cost of introducing distortion, highlighting a need to characterise the symbol error rate (SER) performance loss due to MM. This reported work focuses on the M-PSK case....