Open loop and close loop testing in LTE

Here I write short notes on how to test open loop and close loop testing in lte and what idea behind it. In open loop no any data send back and in closed loop all relevant data available to both side lets check in some detail. Open and close loop testing in LTE: Open loop […]

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Open loop and close loop testing in LTE, open loop, close loop, loop, lte, source, feedback, receiver, testing equipment, testing of lte, baseband, demodulation

Receiver Design for LTE

The main objective of the study is to take action for the entire measurement receiver. However, many factors can affect the performance of the receiver, such sub-blocks of receipt must be checked on the basis of the first and measurable contributions eliminate or reduce uncertainty. If using multiple receivers, it is necessary to make these […]

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Receiver Design for LTE, Open and closed loop operation, lte receivers, division duplex, lte design, receiver, testing receiver, design receiver, lte models

Basic Test for LTE Transmitter and Receiver Design

LTE already requires fundamental changes in the base and handset and research project due to higher data rates, there is an important signal bandwidth and enhance integration and miniaturization in mobile phones, for example: Need to handle 6 different channel bandwidth from 1.4 to 20 MHz, and both frequency division duplex (FDD) and Time Division […]

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lte test, transmitter lte, receiver lte, lte handset, handset test lte, lte radio test, basic lte handset requirement

Principle of Power control in LTE

Power control – already being applied in 2nd and 3rd generation networks – has high potential for improvement of the performance of mobile networks. Main benefits are: 1. It can bring down the interference in up- and downlink and hence enhances the capacity of the networks. 2. Additionally it helps to keep down the uplink-power […]

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Principle of Power control in LTE, closed loop, power control, resource element, uplink power, transmission power, term resource, element energy, control determines, closed loop

Which Cell Parameters needs to Obtain in LTE?

To provide the most critical information to the UEs, the eNodeB uses the BCH channel The information is sent on pre-defined time-frequency resources. This information is organized into different information blocks: The MIB, the Master Information Block. System Frame Number DL -downlink System Bandwidth Number of Transmit Antennas at eNodeB Periodicity: 4 RFs SIB1 How […]

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Cell Parameters needs to Obtain in LTE, parameter lte, transmit, antennas, enodeb, system frame number, downlink

What is Cyclic prefix in LTE ?

The guard period after each rectangular pulse carrying the modulated data symbol is a simple and efficient method to deal with multi-path reception. The cyclic prefix (CP) simply consists of the last part of the following symbol. The size of the cyclic prefix field depends on the system and can even vary within one system. […]

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What is Cyclic prefix in LTE, symbol, receiver, correlation, interference, FFT synchronization,

Implementation Margin in LTE

Implementation margin is used to include non-ideal receiver effects such as channel estimation errors, tracking errors, quantization errors, and phase noise.  This implementation margin or sensitivity degradation can be used to apply some margin to the link budget to account for devices from other vendors that may have larger tolerances from the specifications or for […]

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Implementation Margin in LTE, noise, margin, error, phase, tracking error

RE – groups & CFI – Control Format Indication in LTE

RE – groups & CFI – Control Format Indication in LTE is as below. RE – groups In order to support DL control information mapping, RE-groups are defined. Four useful symbols are bundled, useful in the sense that RE’s carrying the cellspecific reference symbols are not available. The one cell-specific RS case is mapped in […]

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cfi group, lte cfi, lte re groups, control format indication, subframe, pdcch, pcfich, antenna port

How Many LTE Downlink Transport Channel ? How its Work?

There are major four channel in LTE Downlink trasport channel. which list below with its work in short. Paging Channel ( PCH) Supports UE discontinuous reception (DRX) to enable UE power saving. Broadcasts in the entire coverage area of the cell. Mapped to physical resources which can be used dynamically also for traffic/other control channels. […]

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lte downlink, pch channel, bch channel, dl sch channel, downlink transport, lte channel downlink, mch channel, multicast, channel, working of lte channel

Single and Multiple User MIMO in the Uplink SU MIMO LTE

SU-MIMO is within LTE, but at the time of this writing has not yet been fully identified. To implement the SU-MIMO UE require two transmitters. This is an important problem from the standpoint of cost, size and battery consumption, and for these reasons, SU-MIMO is not currently a priority for development. Moreover, increased rates of […]

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Uplink SU MIMO, uplink, su mimo, two transmitters, receiver ENB, different UE, frequency, capacity

Single User and Multi User MIMO codewords in LTE

Figure shows how the two codewords are used for a single user in the downlink. It is also possible that the code words to be assigned to different users to create multi-user MIMO (MU-MIMO). Depending on the channel information available in the eNB, modulation and precoding layers may be different to match the performance. Precoding […]

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Single User and Multi User MIMO codewords in LTE, mimo, precoding choices, channel, two layers, Single User MIMO, Multi User MIMO

Codeword, layer, and precoding in LTE

Terms codeword, layer, and precoding have been taken to refer specifically to LTE signals and processing. The figure shows the processing steps to which they relate. The terms used in the following ways: Codeword: codeword represents the user data before it is formatted for transmission. One or two code words, CW0 and CW1, may be […]

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Codeword, layer, and precoding in LTE, codeword, Layer, Precoding, Eigen beamforming, channel, mimo in lte, user mimo, beamforming, LTE signals

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