Emerging Broadband Wireless Technologies


Amitava Ghosh
Motorola


Abstract: 

Standardization work on long term evolution (LTE) of the UMTS Terrestrial
Radio Access and Radio Access Network and 802.16e (a.k.a. WiMAX) has been
completed and these technologies are currently being deployed throughout
the world.  Both of these technologies are OFDM based and provide
improved system capacity and coverage, high peak data rates, low latency,
reduced operating costs, multi-antenna support, flexible bandwidth operations
and seamless integration with existing systems. Currently, system enhancements
are being considered to provide substantial improvements to LTE (a.k.a.
LTE-Advanced) as well as WiMAX (a.k.a. 802.16m) so that it will meet or
exceed IMT-Advanced (IMT-A) requirements.  One of the key requirements for
IMT-A is to offer peak target data rates of 1 Gbps in the downlink and
500 Mbps in the uplink @ 100 MHz BW, in addition to improvement in both
downlink and uplink spectral efficiencies,  handoff latency, etc.
When deployed, both LTE-A and 802.16m will enable operators to offer
true wireless broadband experience at a low cost/bit.

This talk will provide a comprehensive overview and performance of
LTE Release-8 (both FDD and TDD) and current WiMAX system including
technology trial results.  Next, the requirements for IMT-A, LTE-Advanced
and 802.16m technologies will be discussed. Enhancement to LTE Release-8
for both for homogeneous and heterogeneous network will be presented next.
These enhancements includes, i) carrier aggregation which allows operators
to deploy a system with larger bandwidth by aggregating several smaller
contiguous or non-contiguous carriers; ii) uplink and downlink spatial
multiplexing; iii) co-ordinated multipoint transmission and reception (COMP)
and iv) relay technology.  Finally, the air-interface of 802.16m technology
will be summarized and compared to LTE-A.


Biography
---------

Amitava Ghosh joined Motorola in 1990 after receiving his Ph.D in
Electrical Engineering from Southern Methodist University, Dallas.
Since joining Motorola he worked on eight different wireless technologies
starting from IS-95, cdma-2000, 1xEV-DV/1XTREME, 1xEV-DO, UMTS, HSPA,
802.16e/WiMAX/802.16m, Enhanced EDGE and 3GPP LTE. Recently, he led the
effort from Motorola’s side in defining 3GPP LTE physical layer standards
from the concept phase to the adopted baseline.  

Amitava has 40 issued patents and numerous external and internal technical
papers.  He is the reviewer of IEEE communications society and book reviewer
for a popular WiMAX book.  Currently, he is Fellow of Technical Staff in
Network Advance Technology, Motorola Home and Networks Mobility and works
in the area of current and future air-interface technologies for 802.16m,
3GPP LTE, LTE-Advanced and other broadband technologies. His research
interests are in the area of digital communications, signal processing and
wireless communications. He is a senior member of IEEE and associate member
of Motorola Science Advisory Board.