Modulation Techniques in LTE

LTE devices use several modulation techniques to modulate data and control information. These modulation techniques include: QPSK (2 bits per symbol), 16QAM (4 bits per symbol), and 64QAM (6 bits...
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Modulation Techniques4g modulation techniques qam 64qam, downlink, enodeb, lte device, lte modulation techniques, modulation, qam, sinr, uplink, uplink sinr vs modulation schemes


The use of multiple antenna technology allows the exploitation of the spatial domain as another new dimension. This becomes essential in the quest for higher spectral efficiencies With the use...
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MULTIPLE ANTENNA TECHNOLOGYdimesion, implementation margin, linearly, lte, multiple antenna, pn, receive, scales, telecom, transmit


Adopting a multicarrier approach for multiple access in LTE was the first major design choice. The choice of multiple-access schemes was made in December 2005, with OFDMA being selected for...
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antenna, MULTICARRIER TECHNOLOGIESaccess in lte, cell, dimension, fdma, lte, multicarrier, ofdma, pn, sc fdma, telecom, uplink


If some knowledge of the downlink channels of the different transmit antennas, (more specifically some knowledge of the relative channel phases) is available at the transmitter side, multiple transmit antennas...
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BEAMFORMING in LTEantenna, beamforming, channels, downlink, lte, pn, receiver, signal, telecom, transmit


  LTE network is a PS-Only System, where E-UTRAN is limited to a single node (ENodeB, or eNB). The eNB handles all radio access and control functions. In the core...
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lte networkenb, enodeb, epc, lte, mme, mobility, network, radio access, telecom

UL Allocation (SC-FDMA) in LTE

SC-FDMA utilizes single carrier modulation, DFT-spread orthogonal frequency multiplexing, and frequency domain equalization. LTE uses OFDMA on the DL. It allocates DL bandwidth to the user based on resource blocks,...
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ofdma, subcarriers, transmitted, symbol, spreadamplifier, amplitude, bandwidth, cell, dl, enodeb, fdma, ofdma, orthogonal, resource block, subcarrier

3G LTE Requirements

Spectrum efficiency  DL : 3-4 times UL : 2-3 times Frequency Spectrum Scalable bandwidth : 1.4, 3, 5, 10, 15, 20MHz To cover all frequencies of IMT-2000: 450 MHz to...
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3G LTE Requirementsbandwidth, c plane, efficiency, imt 2000, latency, lte, peak data rate, spectrum, uplink

LTE TCP Throughput vs Round Trip Time (RTT)

•The Transmission Control Protocol (TCP) is designed to provide reliable transport for packet  data. •Today TCP is used for 80-90% of all packet traffic in the internet. •TCP is typically...
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LTE TCP Throughput vs Round Trip Time (RTT)apn, gsm, latency, lte, lte tcp performance, pn, tcp, telecom, transmission control protocol, u plane, vlr

LTE Possible Dimensioning Concepts

•„All-Average“ –The backhaul connection shall support the aggregated average capacity of all cells. The average capacity is determined under realistic air interface conditions and multiple users per cell. – •„All-Average/Single-Peak“...
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LTE Possible Dimensioning Conceptsavarage, capacity, dimensioning, gsm, interface, lte, pn, telecom, vlr

LTE Channel Mapping and UE Categories

Logical and transport channel mapping in downlink and uplink LTE UE Categories...
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LTE Channel Mapping and UE Categoriesdownlink, logical, lte, telecom, transport, ue categories, uplink

LTE Network and Protocol Architecture

LTE/SAE network architecture EPC -Evolved Packet Core Base Station control plane and user plane protocol stacks EPC protocol stacks  ...
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LTE Network and Protocol Architecturearchitecture, epc, lte, packet, protocol, sae, telecom

LTE SC-FDMA and LTE Uplink

Introduction to SC-FDMA and uplink frame structure Marriage of single carrier transmission and FDMA Uplink SC-FDMA tranmsit and receive chains Peak to Average Power Ratio (PAPR) comparison with SC-FDMA and...
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LTE SC-FDMA and LTE Uplinkcarrier, fdma, lte, ofdma, power ratio, sc fdma, telecom, transmit, uplink, uplink frame, uplink scfdma

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