OFDM and LTE
An FPGA implementation of OFDM transceiver for LTE applications
... physical and network layer ...WARP and Matlab through an Ethernet ...workspace and signals generated in Matlab can be transmitted in real-time over-the-air using the nodes, facilitating rapid ...
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Survey On Scheduling And Radio Resources Allocation In Lte
... TDMA and Frequency Division Multiple Access FDMA. It is derived from OFDM multiplexing, but it allows the multiple access of the radio resources shared among multiple ...subcarriers and allocates a ...
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Analysis and Simulation of LTE Downlink and Uplink Transceiver
... communications. LTE provides high spectral efficiency, high peak data rates, short round trip time, and frequency flexibility ...(OFDM) and Multiple-Input and Multiple- Output (MIMO), ...
6
Multipacket Reception in LTE femtocell networks
... in LTE femtocell DL access scheme, the big advantage of OFDMA is its robustness in the presence of multipath signal propagation and its main drawback is the very pronounced envelope fluctuations of the ...
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LTE Physical Layer DL Simulator & PSS Detection Algorithm Evaluation Using the LTE DL Simulator
... (PSS) and the uplink random access ...multiplications.In LTE system, in order to access the network, User Equipment(UE) should detect the primary synchronization signal (PSS) and secondary ...
4
Avaliação da qualidade e desempenho de serviços em redes LTE
... Physical DL Shared Channel (PDSCH): é o principal canal para transporte de informação o qual é assignado aos utilizadores de uma forma dinâmica e oportunista. O PDSCH transporta os dados em Transport Blocks (TB) o que ...
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CE-OFDM Schemes: Spectral Characterization and Optimum Performance
... [3] and digital video broad- casting (DVB) ...equalizers and their good spectral efficiency due to the orthogonal arrangement of the ...of OFDM signals, they suffer from a high peak-to- average power ...
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3GPP LTE: An Overview
... The OFDM is a data transmission multi-carrier modulation technique, which divides a high bit-rate data signal into several parallel low bit-rate data signals which are then modulated using an appropriate ...
6
Estudo da tecnologia long term evolution (LTE) e LTE-advanced (4G)
... O OFDMA (Ortogonal Frequency Division Multiple Accesso) é uma extensão do OFDM. “Consiste num esquema de modulação digital multiportadora que é amplamente utilizado em sistemas sem fios, mas tem uma utilização ...
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Iterative space-frequency equalization techniques for LTE
... uplink and from 100 Mbps to 1Gbps for downlink both indoor and outdoor, scalable bandwidth, interoperability and easy roaming, together with lower latency, the use of MIMO spatial multiplexing with ...
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Detection techniques for the uplink of LTE
... by OFDM technol- ogy with low Peak-to-Average Power Ratio (PAPR) of traditional single-carrier (SC) ...with OFDM-based schemes, SC-FDMA includes a Cycle Prefix (CP), long enough to cope with maximum channel ...
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Avaliação de performance de algoritmos de escalonamento em redes LTE
... O canal de rádio pode ter 1,4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz e 20 MHz de largura de banda [5] tanto no uplink quanto no downlink. No downlink a técnica de modulação usada é o Orthogonal Frequency Division Multiplexing ...
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Geração em FPGA de sinais LTE
... o LTE, tiram partido do OFDM para disponibilizar melhorias ao nível da eficiência espetral, da robustez face a interferências e da baixa distorção ...O OFDM tem vindo a ser adaptado e aperfeiçoado ...
174
Construction and analysis of quaternion MIMO-OFDM communications systems
... quaternions and hypercomplex commutative algebras to OFDM modulation schemes in ...to OFDM schemes. The concept of MIMO-OFDM was first described by Rayleigh and Jones before the turn of ...
11
Sincronismo de tempo e frequência em receptores OFDM
... time and frequency synchronization system for OFDM (Orthogonal Frequency Division Multiplexing) ...the OFDM technique is adopted in nearly all wireless broadband systems (IEEE ...timing and ...
134
Design and Performance Analysis of FFT in OFDM applications using VHDL
... part, and it will be replaced by Orthogonal Frequency Division Multiple Access (OFDMA) [5] [9] in the next generation wireless communication systems such as WiMAX [1] [2] and 3G-LTE ...of OFDM ...
7
Sincronização em OFDM
... o LTE (Long Term Evolution) e o WiMAX tˆ em evolu´ıdo muito rapidamente, com o objectivo de proporcionar velocidades de transmiss˜ ao at´ e antes n˜ ao ...e LTE, tem demonstrado a potencialidade desta t´ ...
108
Frame Detection For Synchronization In OFDM
... interval (GI) is used to avoid inter-symbol interference (ISI), and the length of the GI is 16 samples. One of the purposes of the preamble preceding every OFDM packet is to allow start-of-symbol detection. ...
4
Estudos de sistemas OFDM para comunicações ópticas
... técnica OFDM (orthogonal frequency division multiplexing) que estabelece sobreposição espectral das subportadoras e, desta forma, permite a transmissão dos dados em forma multiplexada com grande eficiência ...
115
Análise do impacto da utilização de femto-células em LTE
... interferência. Assim, os enodeBs vizinhos passam a ter como objectivo escalonar os utilizadores de reduzida interferência nos PRBs de elevada interferência, evitando assim escalonar os utilizadores que se encontram na ...
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