There are several new key enabling technologies in the design of LTE. These are
1. OFDM
2.Multiple antenna techniques
3. SC-FDMA
4. Channel dependent resource sharing
5. IP based Network
These technologies enable this evolution. It is important to know about these technologies if one wants to understand this standard. This is the brief discussion about some of these.
1. OFDM : Hmm..OFDM stands for Orthogonal Frequency Domain Multiplexing. Basically it is a multicarrier system which uses multiple subcarriers for transmitting single data stream.. Now thats something!! :) We have multicarrier system, multiple subcarriers and just single data stream!! Isn't that unfair..The picture after this section will explain it well. This is the flow chart I had created for one of my class projects..This helped me understand the working of OFDM.
2. Multiple Antenna Techniques : Everything related to LTE has to have "multiple" things!! Basically it means that this standard can use multiple antennas to transmit and receive. There are several techniques available to be used. We will discuss these in detail. These techniques include, Transmit diversity, beamforming, multiuser MIMO and spatial multiplexing!!
3. SC-FDMA : SC-FDMA is a multiuser version of SC FDE(Single Carrier Frequency Division Equalization). It is implemented at the uplink.
4. Channel dependent resource sharing : OFDMA provides great deal of flexibility in LTE. Allocation both in frequency and time is permitted here.
5. IP Based Network : LTE standard has been designed to reduce the hierarchical structure of networks. In the previous generations, the levels were more and so was the cost and latency. In this particular standard, there is just MME between SAE Gateway and the eNodeB. This has drastically reduced the latency and increased the cost.
1. OFDM
2.Multiple antenna techniques
3. SC-FDMA
4. Channel dependent resource sharing
5. IP based Network
These technologies enable this evolution. It is important to know about these technologies if one wants to understand this standard. This is the brief discussion about some of these.
1. OFDM : Hmm..OFDM stands for Orthogonal Frequency Domain Multiplexing. Basically it is a multicarrier system which uses multiple subcarriers for transmitting single data stream.. Now thats something!! :) We have multicarrier system, multiple subcarriers and just single data stream!! Isn't that unfair..The picture after this section will explain it well. This is the flow chart I had created for one of my class projects..This helped me understand the working of OFDM.
2. Multiple Antenna Techniques : Everything related to LTE has to have "multiple" things!! Basically it means that this standard can use multiple antennas to transmit and receive. There are several techniques available to be used. We will discuss these in detail. These techniques include, Transmit diversity, beamforming, multiuser MIMO and spatial multiplexing!!
3. SC-FDMA : SC-FDMA is a multiuser version of SC FDE(Single Carrier Frequency Division Equalization). It is implemented at the uplink.
4. Channel dependent resource sharing : OFDMA provides great deal of flexibility in LTE. Allocation both in frequency and time is permitted here.
5. IP Based Network : LTE standard has been designed to reduce the hierarchical structure of networks. In the previous generations, the levels were more and so was the cost and latency. In this particular standard, there is just MME between SAE Gateway and the eNodeB. This has drastically reduced the latency and increased the cost.
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