interleaving

LTE Frame Structure and Resource Block Architecture

LTE Frame Structure The figure below shows the LTE frame structure under Time division mode (TDD) Type 2 and Frequency Division mode (FDD) Type 1. Main differences in LTE Frame...
Article Topics :

resource block, reference signal in lte resource block, frequency, block architecture, cyclic prefix, division mode, physical resource, frameactive, enodeb, google, harq, hlr, interleaving, prb lte, resource block, rf optimization, tdd frmae type2

What is the difference between 4G and 4G LTE?

Many people use the terms 4g and 4g interchangeably, but they are not the same. Lets find out the difference…. Features of 4g 4G is the next step above and...
Article Topics :

access in lte, data lte, downlink, enodeb, epc, epc lte, epc lte architecture, fdma, frequency, interleaving, lte basic, lte rf planning, lte ue, mimo

Forward Traffic Channel of CDMA

Forward Traffic Channel is used to Transmit Data and Signaling Information. Symbol repetition makes symbol streams at different rates adapted to those at the rate of 19.2k. The original symbol...
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active, cdma, CHANNEL, forward, handoff, interleaving, lai, neighbor, PAGING, pilot, power control, reverse, search window, sim

Transmit Diversity of CDMA

Diversity technology means that after receiving two or more input signals with mutually uncorrelated fading at the same time, the system demodulates these signals and adds them up. Thus, the...
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active, cdma, CHANNEL, forward, handoff, interleaving, lai, neighbor, PAGING, pilot, rake, reverse, search window, sim

Types of Power Control in CDMA

Reverse power control Open loop power control Closed loop power control Inner loop power control:  800 Hz Outer loop power control Forward power control Message transmission mode: threshold transmission periodic...
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active, cdma, cell, code, handoff, interleaving, long, modulation, power, power control, power control in cdma, qpsk, scrambling, short, soft, softer

Long Code & Short Code In CDMA

The long code is a PN sequence with period of 242-1chips The functions of a long code: Scramble the forward CDMA channel Control the insertion of power control bit Spread...
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active, cdma, cell, code, handoff, interleaving, long, modulation, pn, power, power control, qpsk, scrambling, short, soft, softer

Interleaving in CDMA

It can be seen from the figure that the data are read row by row into an interleaver at the transmit end,read column by column out (this process is called...
Article Topics :

active, cdma, cell, code, handoff, interleaving, long, modulation, power, power control, qpsk, scrambling, short, soft, softer

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...
Article Topics :

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

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 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

Soft/Softer Handoff in CDMA

Multi-path combination in the BSC during soft handoffMulti-path combination in the BTS during softer handoffs       Soft handoff means that during the handoff of a mobile station at the coverage...
Article Topics :

active, cdma, cell, code, gsm, handoff, interleaving, long, modulation, power, power control, qpsk, rake, scrambling, short, soft, softer

Forward Power Control in CDMA

Message Transmission Mode MS measures the frame quality and informs the base station to the result i.e. whether it is in the threshold or periodical  mode. Base station determines whether ...
Article Topics :

active, cdma, cell, code, handoff, interleaving, long, modulation, power, power control, power control in cdma, qpsk, scrambling, short, soft, softer

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