LTE

Affects of the Channel in LTE MIMO

To understand the impact of the channel, let’s assume that the base station receiver is facing many challenges in the same MIMO receiver that universal areas, but also must receive data simultaneously from multiple users. In terms of MIMO UM, each signal is derived from a separate UE, because each signal is completely independent channel, […]

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Affects of the Channel in LTE MIMO, base station, orthogonal, test signals, receiver, mimo receiver, the channel, normal operation lte channel, direct mimoe

How Cross domain signal analysis in LTE

Regarding cross domain analysis, we see that, I traditionally signal from a receiver RF section can be demodulated and Q components using analog techniques. Today, however, the down conversion signal is digitized by an ADC IF, and usually then fed into the section of the baseband demodulation and decoding. In Cross domain signal Measurement ADC […]

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cross domain, LTE cross domain signal analysis, vsa software, domain signal, signal analysis, rf measurements, digital domain, digital data, analyzers

Power ramping in LTE

Open loop power control together with optional power ramp-up is used during the random access process at the beginning of the connection until more accurate control information is available. Power loss due to transmission distance depends on to the increase of the distance between NodeB and the UE. In such a case, feedback information from another side is not […]

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Power ramping in LTE, power control, open loop, transmission power, power loss, initial transmission

Wide bandwidths concept for LTE MIMO

One of the unique aspects of LTE is the support of the six channel bandwidths from 1.4 MHz to 20 MHz. To simplify system operation and roaming phones should support all these bandwidths, although effective deployment in any one area may be limited to fewer band width 20 MHz LTE is significantly larger than the […]

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lte, lte signal, reference signal, enb and ue, digital signal processing, phase fitness, filters, amplifiers, ue receiver

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

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