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8/3/2019 Filter for IMT-Advanced Network
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A
Project
on
Reconfigurable Filter for IMT-Advanced Network
Presented by
Bikash Ranjan Ram(MEEC/1039/2010)
Under the guidance of
Prof. G.K.Misra
Department of Electronics & Communication Engineering
BIT, Mesra
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Content
Introduction
IMT-Advanced and its Features
Technologies consideration for IMT-Advanced
Reconfigurable Bandpass Filter
Reconfigurable circuit concept
Designing of reconfigurable Filter
Simulation Results
Future Works
References
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INTRODUCTION
International Mobile Telecommunications - Advanced(IMT-Advanced)
4G Radio Access Technology.
Defined by ITU for mobile communication systems Capabilities which go further than that of IMT-2000.
IMT-2000 support data rate around 30 Mbps. We need higherdata rate.
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Features of IMT-Advanced
100 Mbit/s for high mobility
1 Gbit/s for low mobility
Interoperability with existing wireless standards
Scalable channel bandwidth 520 MHz, optionally up to 40 MHz
Peak link spectral efficiency of 15 bit/s/Hz in the downlink,
6.75 bit/s/Hz in the uplink
Offer high quality of service for multimedia support
Spectrum bands
2.32.4 GHz band 3.44.2GHz band
4.44.99GHz band.
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Technologies Considered
Wider-band transmission and spectrum sharing Using Carrier Aggregation
Coordinated multi-point transmission A. The terminals are not aware of the transmission originating from multiple, geographically separated
points.
B. terminals provide channel-status feedback to
the network for all downlink channels visibleto a particular terminal
C. The channel-status reporting is the same as in approach B. However, unlike approach B, theterminals are provided with knowledge about the exact coordinated transmission.
Multi-antenna solutions
Spatial multiplexing Beam-forming
Relays and RepeatersSimply amplify and forward the received analog signals
The intermediate node may also decode and re-encode any received data prior to forwarding
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Filter
Reconfigurable
Behavior can be changed by reconfiguration.
Capacity to change
An individual radiator fundamental operating characteristic
Operating frequency
Impedance Bandwidth
Needs of reconfigurable filter Support multiple system standards.
Multiple filters occupy large surface area so it is highly integrated
Low-Power
Low Cost
Low insertion loss
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Bandpass Filter
A band-pass filter is a device that passes frequencies within a certainrange and rejects (attenuates) frequencies outside that range.
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Reconfigurable Circuit concept
A network prototype suitable for reconfigurable filters
ABCD-parameter for above prototype is as follow
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After applying the s=1/s transformation to preceding equation
According to Richards transformation
S= j tan ( (/2) *(f/fr) )
where,
f= Real frequency variablefr= Commensurate frequency = 2.75 * lower frequency.
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Circuit concept
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Designing
50 50
Open circuit structure
All impedance values are in .
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Designing
50 50
Short circuit structure
All impedance values are in .
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Simulation Results
666.666
MHz
1333.333
MHz
Centre Frequency
1 GHz
Result for open circuit structure
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Simulation Results
1416.667
MHz
2083.334 MHz
Centre frequency
1.75 GHz
Result for short circuit structure
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Future Works
Implementation for IMT-Advanced Band.
Implementation of RF switches.
Fabrication.
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References
1. Wael M. Fathelbab, Senior Member, IEEE, A New Class of Recongurable Microwave
Bandpass Filters IEEE Trans. on circuits and systemsii: Express brief, vol. 55, no. 3,
March 2008.
2. I.C. Hunter and J. D. Rhodes, Electronically tunable microwave band-pass lters, IEEE
Trans. Microw. Theory Tech. , vol. MTT-30, no. 9,pp. 13541360, Sep. 1982.
3. H. J. Orchard and G. C. Temes, Filter design using transformed vari-able, IEEE Trans.Circuit Theory , vol. CT-15, no. 4, pp. 385408, Dec.1968.
4. J. A. G. Malherbe, Microwave Transmission Line Filters . Natick,MA: Artech House, 1979.
5. Stefan Parkvall, Erik Dahlman, Anders Furuskr, Ylva Jading, Magnus Olsson, Stefan
Wnstedt, Kambiz Zangi, LTE-Advanced Evolving LTE towards IMT-Advanced-
Ericsson Research 16480 Stockholm, Sweden [email protected]
6. www.3gpp.com/LTE-Advanced.7. Ian F. Akyildiz, David M. Gutierrez-Estevez, Elias Chavarria Reyes ,The evolution to 4G
cellular systems: LTE-Advanced.-Broadband Wireless Networking Laboratory, School of
Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA30332,
United States
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Thank You