Ranging in Wimax

Since each MS has a unique distance from the base station, it is critical in the uplink to synchronize the symbols and equalize the received power levels among the various...
Article Topics :

active, cdma, cell, downlink, intersymbol interference, power control, ranging, ranging in wimax, symbols, telecom, uplink

What are the Advantages of OFDMA in Wimax ?

 OFDMA is essentially a hybrid of FDMA and TDMA: Users are dynamically assigned subcarriers (FDMA) in different time slots (TDMA) . The advantages of OFDMA start with the advantages of...
Article Topics :

access, cell, fdma, frequency diversity, ofdm, ofdma, subcarrier, tdma, telecom, uplink, user

The Difference Between Line Of Sight and Non-Line Of Sight

Earlier wireless technologies (LMDS, MMDS for example) were unsuccessful in the mass market as they could not deliver services in non-line-of-sight scenarios. This limited the number of subscribers they could...
Article Topics :

3g, antenna, broadband, difference between, fixed, point, solution, system, telecom, wifi, Wimax

What is Fixed WiMAX ?

Fixed WiMAX offers cost effective point to point and point to multipoint solutions. What makes WiMAX so exciting is the broad range of applications it makes possible but not limited...
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3g, antenna, broadband, cell, difference between, fixed, point, solution, system, telecom, wifi, Wimax

WiMAX versus 3G and Wi-Fi

How does WiMAX compare with the existing and emerging capabilities of 3G and Wi-Fi? The throughput capabilities of WiMAX depend on the channel bandwidth used. Unlike 3G systems, which have...
Article Topics :

3g, antenna, broadband, cdma, cell, difference between, difference between wimax and wifi technology, fixed, lte vs wimax comparison table, modulation wimax, point, solution, system, telecom, uplink, wifi, wifi and wimax difference, Wimax

Narrowband Wireless Local-Loop Systems

Naturally, the first application for which a wireless alternative was developed and deployed was voice telephony. These systems, called wireless local-loop (WLL), were quite successful in developing countries such as...
Article Topics :

3g, antenna, broadband, cdma, difference between, fixed, lte, point, rho, solution, system, telecom, wifi, Wimax

Handover Measurements in LTE

Measurements to be performed by a UE for intra/inter-frequency mobility are controlled by e-UTRAN, using broadcast or dedicated control. If the frequency center of the measured cell is the same...
Article Topics :

cell, handover, how handover works in lte in same frequency without measurement gap?, lte, lte handover, measurements, rrc, telecom

Handover Process in LTE

The source eNB issues a HANDOVER REQUEST message to the target eNB passing the necessary information to prepare the HO on target side (UE X2 signaling context reference at source...
Article Topics :

"epc handover", cell, connected, epc, handover process in lte, ho, lte, lte 4g, rnti, telecom

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...
Article Topics :

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...
Article Topics :

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

Intra E-UTRAN Handover in LTE

The UE is RRC connected. During the HO: The radio link is released from the eNodeB 1 and re-established on the eNodeB 2 The Control plane is switched to the...
Article Topics :

enodeb, eutran, handover, handover cancel enodeb, intra, lte, telecom

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