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LTE ADVANCED – A REAL OPPORTUNITY TO CHANGE THE WORLDprovided we mercilessly exploit it!
Linda Doyle
Long Term Evolution (LTE)
Targeted at high speed mobile broadband
LTE is an OFDMA based technology
Uses SC-FDMA in the uplink to reduce PAPR
LTE supports scalable carrier bandwidths, from 1.4 MHz to 20 MHz
Uses MIMO techniques
LTE supports both frequency division duplexing (FDD) and time division duplexing (TDD)
Simplified network structure – All IP
Support for MBSFN (Multicast Broadcast Single Frequency Network)
http://www.fcc.gov/pshs/techtopics/techtopics22.html
Wider-band transmission
Advanced Multi-antenna solutions
Coordinated multi-point transmission
Extended Coverage through Relays and Repeaters
Backwards compatible with LTE
Some LTE Advanced features
what they want .....
100 MHz of spectrum, functioning highly advanced multiple antenna solutions, dense small cell coverage and extended reach through relay services
carrier aggregation
contiguous non-contiguous
intra-band inter-band
antenna issues, RF frontend issues, dynamic resource allocation issues, optimisation issues, signalling issues etc......
Azarnasab, Ehsan; Kempter, Roland; Patwari, Neal; Farhang-Boroujeny, Behrouz Filterbank Multicarrier and Multicarrier CDMA for Cognitive Radio Systems. CrownCom 2007.1-3 Aug. 2007 Page(s):472 - 481
filterbank synthesis? sneaking into a standard?
idea is to get rid of thecyclic prefix while at the sametime making it easy to reconstruct – i.e. no need fora complex receiver
Bansal, G., M. J. Hossain and V. K. Bhargava, “Optimal and suboptimal power allocation schemes for OFDM-based Cognitive Radio systems” , IEEE Trans. Wireless Commun., 7(11): 4710-4718, Nov. 2008.
high order modulation
low order modulation
higher power
lower power
power loading
http://www.fcc.gov/pshs/techtopics/techtopics22.html
We could do a similar analysis here and look at how the cognitive radio world will help but will leave this analysis to Allen MacKenzie and Luiz DaSilva, who are experts in the field of cognitive networks…..
it’s the end of the world as we know it
and I feel fine.
R.E.M. 1998
http://www.youtube.com/watch?v=_eyFiClAzq8&feature=related