Tag Archives: ofdma


Difference Between OFDM and FDM in LTE

FDM in LTE Conventional multi-carrier operation as it is used for FDM works simply by selecting a number of center frequencies – one for each carrier to be used. The

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

System information & DL-SCH data in LTE

System information 1920 bits or 1728 bits are to be transmitted for normal or extended CP resp.. The PBCH is transmitted every 40 ms. The bit scrambling depends on the

The Benefit of OFDM & OFDMA in Wimax

Less complex modulation. OFDM is a simpler modulation technique that is better suited to deployments that do not require support for mobility.  License-exempt bands. Mobile services require licensed spectrum to

Emergence of Standards-Based Technology

In 1998, the Institute of Electrical and Electronics Engineers (IEEE) formed a group called 802.16 to develop a standard for what was called a wireless metropolitan area network, or wireless

OFDMA Parameter for LTE

How Many OFDMA Parameter for LTE? Which is OFDMA Parameter for LTE ? The width of a Sub-carrier is 15 kHz whatever the bandwidth The bandwidths are: 1.4, 3, 5,

Difference between DL and UL in LTE

what is main Difference between DL and UL in LTE ? OFDMA Advantages Robust against narrow-band co-channel interference Robust against Intersymbol interference (ISI) and fading High spectral efficiency Efficient implementation

OFDMA Transmitter in LTE

How OFDMA Transmitter in LTE ? In the downlink, OFDM is selected to efficiently meet E-UTRA performance requirements. With OFDM,  it is straightforward to exploit frequency selectivity of the multi-path

OFDMA Principles in LTE

There are several ways to transmit over the frequency band and to share the resource between several devices.   What is TDMA,CDMA & FDMA ?   1.TDMA • The users

MULTICARRIER TECHNOLOGIES IN LTE

Adopting a multicarrier approach for multiple access in LTE was the first major design choice. The choice of multiple-access schemes was made in December 2005, with OFDMA being selected for