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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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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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

Processing Procedure of WCDMA System

Source coding can increase the transmitting efficiency. Channel coding can make the transmission more reliable. Spreading can increase the capability of overcoming interference. Through the modulation, the signals will transfer...
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Processing Procedure of WCDMA Systemcdma, CHANNEL, chip, coding, interleaving, modulation, signal, spreading, telecom

WCDMA Source Coding

AMR (Adaptive Multi-Rate) Speech A integrated speech codec with 8 source rates The AMR bit rates can be controlled by the RAN depending on the system load and quality of...
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WCDMA Source Codingamr, cdma, code, cs, data, domain, gsm, multiplexing, protocol, ps, ran, speech, telecom, WCDMA / 3G

WCDMA Block Coding – CRC

Block coding is used to detect if there are any uncorrected errors left after error correction. The cyclic redundancy check (CRC) is a common method of block coding. Adding the...
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WCDMA Block Coding - CRCblock, cdma, coding, crc, decoding, fading, interference, interleaving, power control, telecom, transmission, WCDMA / 3G

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