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Dr.LAL
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Dr.LAL's Discussions
Will LTE replace WiMAX? Does WiMAX have future?
Replied Jul. 2, 2009
Synchronization required in WiMax
Replied Jul. 24, 2008
Synchronization required in WiMax
Replied Jul. 24, 2008
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LTE, combining OFDM and MIMO, will provide on 2 to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users.
OFDM as we all know splits the informati…
LTE, combining OFDM and MIMO, will provide on 2 to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users.
OFDM as we all know splits the informati…
LTE, combining OFDM and MIMO, will provide on 2 to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users.
OFDM as we all know splits the informati…
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- COMMUNICATIONS ENGINEERING
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- VP and CTO
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- NUCENTCOM
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- SERVICE PROVIDER/IT
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- Sr.VICE PRESIDENT, CTO
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- TECHNOLOGY
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With the incoming Obama administration, much focus in the US has been around the proposed $825 billion economic stimulus plan - including $6 billion for improving US broadband infrastructure. The most likely benefactors of these programs would be rural areas, where WiMAX would be a leading contender for delivering broadband services quickly and cheaply to underserved areas.
On the equipment side, Alcatel-Lucent started a Development Center in Taiwan. ZTE announced that WiMAX ForumTM certification was achieved for its 3.5Ghz WiMAX 802.16e base stations, an industry first in this band. Accton Wireless Broadband (AWB) also announced the company's full range of products had achieved M-Taiwan Wave 2 certification.
On the equipment side, Alcatel-Lucent started a Development Center in Taiwan. ZTE announced that WiMAX ForumTM certification was achieved for its 3.5Ghz WiMAX 802.16e base stations, an industry first in this band. Accton Wireless Broadband (AWB) also announced the company's full range of products had achieved M-Taiwan Wave 2 certification.
Comment Wall (17 comments)
- At 3:57pm on July 2, 2009,
Dr.LAL said…
- LTE, combining OFDM and MIMO, will provide on 2 to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users.
OFDM as we all know splits the information into multiple narrowband subcarriers, allowing each of them to carry a portion of the information at a lower bit rate, which makes OFDM a very robust modulation, particularly in multipath scenarios, like urban areas.
Also MIMO technology creates several spatial paths on the air interface between the network and the subscriber; so these paths can carry the same or different streams of information, allows an increase in either the coverage (due to higher Signal to Noise Ratio (SNR) at the receiver) or the user data throughput.
The result is affordable mass market wireless broadband services that will boost Operator profitability. Faster downloads, video sharing, true Mobile TV with more channels and enhanced quality are just some examples of applications that will benefit from LTE's greater performance.
- At 8:29am on April 16, 2009,
Manish said…
- 6th WiMAX India 2009 scheduled on 21st August 2009 at Le Meridien, New Delhi - India.
For more details kindly visit: http://www.bharatexhibitions.com/english/WiMAX2009.php
- At 4:23am on September 17, 2008,
Syed Sajjad Sattar said… - hi
what is ur opinion about the future of the wimax in comparison
with the 3G.
and can we make use of the wimax as an standard air interface
for 3G,4G,
and what about the job oppertunities in usa.
ok bye
- At 2:27am on August 18, 2008,
Aishwarya Varma said… - hello,
Thanks for the friend request. I work for Soma networks. If there is any information you need please let me know.
Ash
- At 9:52am on July 30, 2008,
Jose Luis Calderon Sanchez said… - Hi!
50 meter.
- At 5:56pm on July 23, 2008,
khouloud said… - thanx for the add
khouloud
- At 4:33pm on July 23, 2008,
Dr.LAL said…
- The MAXIM semiconductors MAX2839 direct conversion, zero-IF, RF transceiver is designed specifically for 2GHz 802.16e MIMO mobile WiMAX systems. The device incorporates one transmitter and two receivers, with > 40dB isolation between each receiver. The MAX2839 completely integrates all circuitry required to implement the RF transceiver function, providing RF to baseband receive path, and baseband to RF transmit path, VCO, frequency synthesizer, crystal oscillator, and baseband/control interface. The device includes a fast-settling sigma-delta RF synthesizer with smaller than 40Hz frequency steps and a crystal oscillator that allows the use of a low-cost crystal in place of a TCXO. The transceiver IC also integrates circuits for on-chip DC-offset cancellation, I/Q error, and carrier leakage detection circuits. An internal transmit to receive loopback mode allows for receiver I/Q imbalance calibration. The local oscillator I/Q quadrature phase error can be digitally corrected in approximately 0.125° steps. Only an RF bandpass filter (BPF), crystal, RF switch, PA, and a small number of passive components are needed to form a complete wireless broadband RF radio solution.
The CHIP completely eliminates the need for an external SAW filter by implementing on-chip programmable monolithic filters for both the receiver and transmitter, for all 2GHz and 802.16e profiles and WIBRO. The baseband filters along with the Rx and Tx signal paths are optimized to meet the stringent noise figure and linearity specifications. The device supports up to 2048 FFT OFDM and implements programmable channel filters for 3.5MHz to 20MHz RF channel bandwidths. The transceiver requires only 2µs Tx-Rx switching time.
Excellent results were obtained in the Korean WIBRO Systems and 802.16e Mobile WiMAX Systems.
- At 11:22am on July 23, 2008,
umasathish said…
- hi LAL
Thanks for ur message .Please keep in touch.
- At 11:00am on July 23, 2008,
Dr.LAL said…
- hello
i was designing around WiMAX components to look for low noise designs for RF transceivers. The CHIP of my interest is MAX2839. The great thing about MAxim is you can request for samples and they have excellent technical support..a great company !
- At 10:02am on July 23, 2008,
Jimish A. Thakkar said… - Hello Sir,
Thanks for adding me on your friend's list..
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