Random Access Procedure in LTE

When the UE has obtained system information, it has to request an RRCconnection. Like it has no dedicated resources, the UE requests the connection using the Random Access Procedure using...
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random access procedure lte, lte rrc states, random access preamble lte, lte cell search procedure detailaccess, BCH, cell, contention free random access, enodeb, lte, lte random access procedure, lte sync, ra-rnti associated preamble, radio, rnti, rrc, step in lte, steps for ue and enodeb, sync, telecom, uplink

WCDMA Modulation

Different modulation methods corresponding to different transmitting abilities in air interface. R99/R4: QPSK HSDPA: QPSK or 16QAM The UTRAN air interface uses QPSK modulation in the downlink, although HSDPA may...
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air interface, amplitude, cdma, cdma modulation, hsdpa, modulation, qam, qpsk, signal, telecom, wcdma modulation, wcdma modulation qam

Step of RRC Connection Setup in LTE

When the UE is powered up, it has to be RRC connected to be able to exchange data and signaling with the network. After the RRC connection, the Initial network...
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Step of RRC Connection Setup in LTE, ue, rrc, connection, rrc connection, initial attachaccess, attach, BCH, cell, contention free random access, enodeb, lte, lte rrc connection, lte sync, radio, rrc, rrc connected users lte, rrc connection setup in lte, step in lte, sync, telecom, uplink

WCDMA Radio Interface Channel Definition

Logical Channel = information container  Defined by is transferred. Transport Channel = characteristics of transmission Described by and with data is transmitted over the radio interface . Physical Channel =...
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cdma, CHANNEL, code, frequency, logical, physical, telecom, transport

Purpose of Channelization Code & Scrambling Code in WCDMA

Purpose of WCDMA Channelization Code Channelization code is used to distinguish different physical channels of one transmitter For downlink, channelization code ( OVSF code ) is used to separate different...
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Purpose of Channelization Code, Scrambling Code in WCDMA, transmitter, physical channels, wcdma downlink, wcdma carrier, services maximum, wcdma codes4. what is the difference between scrambling codes and channelization codes, cdma, cell, chanalization code, channelization code, code, difference between bsic and umts scrambling code, downlink, meaning of downlink channelization codes, ovsf code, physical channel, scrambling and channelization codes of cells, telecom, transmitter, ue, uplink

Process Gain in WCDMA

How Process Gain works in 3G? Process Gain = 10 Log (Chip rate/Bit Rate) Process gain differs for each service. If the service bit rate is greater, the process gain...
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cdma, process gain, service, telecom, ue, WCDMA / 3G

Orthogonal Code Usage – Coding & Decoding in WCDMA

How Orthogonal Code works in WCDMA? 1.Coding By spreading, each symbol is multiplied with all the chips in the orthogonal sequence assigned to the user. The resulting sequence is processed...
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Orthogonal Code Usage - Coding & Decoding in WCDMA, transmitter, receiver, code, usage wcdma, wcdma codescdma, CHANNEL, orthogonal, physical, sequence, symbol, telecom, user, wcdma spreading

WCDMA Network Architecture

WCDMA including the RAN (Radio Access Network) and the CN (Core Network). The RAN is used to process all the radio-related functions, while the CN is used to process all...
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cdma, cn, data, process, radio, ran, telecom, umts, voice call, WCDMA / 3G, wcdma radio network system

Signal Fading

Slow fading: In case shadow effect is caused by obstacles, and the receiving signal strength decreases but the field strength mid-value changes slowly with the change of the topography, the...
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fading, fast fading, slow fading, frequency selective, strength, frequencyalgorithmic, apn, decrease, effect, epc, fading, gsm, hlr, pn, shadow, slow fading, WCDMA / 3G

CDMA Channel Frequencies & Calculation

The 850MHz CDMA band is most popularly used all over the world.This band as mentioned in the previous slide works between       824-849MHz Used for the Reverse link communication      ...
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CDMA Channel Frequencies, mhz, frequency, channels, reverse, forwardapn, BCCH, cdma, CHANNEL, epc, forward, frequency, generate, lte, orthogonal, pn, pn code, processing gain, rho, traffic, vrf, walsh

Downlink Logical Channel in GSM

In 2G GSM Technology in forward direction Downlink (GSM BTS to GSM Mobile). There are mainly five Downlink Logical Channel in GSM. Frequency correction channel (FCCH) Synchronous channel (SCH) Broadcast...
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paging channel, doanlink, gsm doanlink channel, logical bts to mobile gsm channel, bts to mobile forward channel, downlink gsm channel, 2g downlink channel, fcch, bcch, agch, pch, schBCCH, bsic, CHANNEL, channel coding, channel in gsm, frequency hopping, hlr, hopping, interference, interleaving, logical, physical, pn, vlr

What is HS-DPCCH and High-Speed Dedicated Physical Control Channel work in WCDMA

Carrying information to acknowledge downlink transport blocks and feedback information to the system for scheduling and link adaptation of transport block CQI and ACK/NACK Physical Channel, Uplink, SF=256 A High-Speed...
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What is HS-DPCCH and High-Speed Dedicated Physical Control Channel work in WCDMA, hs-dpcch channel wcdma, wcdma control channel, wcdma 3g channel, wcdma basic, wcdma working channel logicalcdma pilot, fading effect on rf network, mobile network code, pilot, pilot carrier in ofdm, pilot channel cdma structure, pilot pn, pilot power vs sync power in cdma

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