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Thanks Fanny; very informative lecture

Rookie

really interesting talk! I am looking forward to the Bluetooth lecture!

Rookie

That was a really interesting talk, thanks Fanny. Looking forward to your thoughts on RF testing.

Rookie

Richard Osterloh, Windsor, UK. Embedded Firmware Engineer in Medical Devices

Rookie

Thanks Fanny

acohenjr

Rookie

note: The audio stream is not downloadable, it is archived and can be replayed as many times as needed.

Rookie

Thank you Fanny for informative session.

Rookie

Thank you all for joining!  I look forward to tomorrow's session.

Blogger

Link to audio - Alex, can you please comment on this?

Blogger

fanny please can u arrange a link to download a audio version of the session..

yes - the ACE supports both 3GPP and WiFi.  octoScope also has some channel emulation technology that i will mention in the next couple of days.

Blogger

Thank you Fanny. Is the ACE able to give Cluster Models for both 3GPP and WiFi Models ?

Rookie

Right - MIMO for base stations, SISO for clients (unless you can afford MIMO) - is typically best

Blogger

The Azimuth ACE had a complete implementation of standards based channel models, most of which are based on cluster statistics.

Blogger

...so from a plain hardware perspective:

SISO for wearable/battery powered devices

MIMO for base stations / access points

Right?

Rookie

Does the Azimuth Channel Emulator emulate different Cluster Models from a single Test Equipment ?

Rookie

please fanny can u arrange a link to download the audio version of session..that will be a great help

Thank You Fanny.

 

Rookie

Thanks for sharing your expertise.

 

Rookie

MIMO techniquest are chanbel dependent and must be dynamic.  The fast response to changing channel conditions is essential.

Blogger

CDMA handles multipath using the 'rake receiver' techniques.  The widest CDMA channel is 5 MHz.  OFDM can span today over 100 MHz.

Blogger

Regarding slide 5, fading is typically frequency selective, so some sub-carriers may be much weaker than others when the signal gets to the receiver.  The data is encoded in such a way as to be detectable even if some subcarriers are missing in the receiver.  Coding techniques are a very sophisticated part of the baseband DSP.

Blogger

hi fanny ! can you arrange link to download the audio version of the session please its really helpful..

The APs can dynamically steer the beam to individual receivers and they can also create complex beams composed of multiple lobes - one for each receiver.

Blogger

i have worked with MIMO in my undergraduation for presentaion of wireless power transmission..

I'd like to see OFDM vs CDMA compared vs the multipath problem.

Rookie

slide 5, in OFDM, How we get the data in the subcarrier subjected to channel fading?.

Thanks

MIMO algorithms are usually 'secret soace' of the chipset manufacturers, and often their chipsets will work better with their own chipsets than with other chipsets.

Blogger

Considering that there are many Techniques for MIMO, is there any specs detailing the efficiency/Tradeoffs for MIMO antennas in a Device for LTE and WiFi ?

 

Rookie

Thank you. Very good presentation

Rookie

Fanny, when there are multiple receiving nodes, do the APs dynamically steer the beam to individual receivers? Or is the beam steering adjusted only occasionally to give the best comprimise for all nodes?

Rookie

What are the most basic algotithms for deciding witch is the better kind of use of the MIMO?


Is based in the number of packets transmited?

Is this usually implemented in some chipsets? What names have? The chipsets or the techniques to choose witch kind of use is better (time delay, different theads, ...) for the MIMO?

And thank you for the resentation

 

 

 

is there a good overview/book on this subject?

Rookie

thxs for very informative presentation

 

Rookie

Thank you very much. Good presentation. See you tomorrow.

 

Rookie

is there any chance to download the audio of the session...

Thanks Fanny. It was very helfull

 

Rookie

Thank you Fanny.  Your talk helped to clear up a few questions that I had regarding MIMO.

Rookie

Thanks Fanny and Alex.

Rookie

Thank you Fanny, great slide package

Rookie

Thanks for all the great info on Mimo

Rookie

thank you fanny.  great presentation.

Rookie

Excellent presentation, look forward to tommorrow

Rookie

@w6pdz Is that a ham call?  You're not in QRZ.

 

Rookie

Thank You Fanny and Alex.

Rookie

Thank you for today's presentation Fanny. 

Rookie

This was a good batch of information to consider. "Lots of Compromises"

Rookie

Fanny, thanks for your presentation. Looking forward Bluetooth tomorrow...

Rookie

with multiple receiving nodes, do the APs dynamicall steer the beam to individual receivers?

Rookie

So, a single stream or multiple streams can be sent using multiple antennas? I presume there are algorithms to decide. Can you clarify this further?

Rookie

Never used MIMO, only SISO

Rookie

Only used single antenna on product side. 

Rookie

i have not used MINO.  I am here to learn pluses + minuses.

Rookie

No experience with wireless, other than mfg sample test kits to make wireless serial ports, which basically require no knowledge to use. Looking to attempt to incorpate wireless in my projects.

Rookie

how does Slide 11 results compare with Slide 8?

Rookie

Get to buy stack of 3 ea. VSA/VSG (i.e., LitePoint) WLAN testers for MIMO ;-) Use a single testing, sequentially, in factory testing

Rookie

Working to measure MIMO throughput on LTE devices

 

Rookie

Yes, worked with MIMO quite a bit on both licensed and unlicensed frequencies... it's definitely better than SISO, but it's not a panacea.  You still need a proper design, link budget, etc.

Rookie

No expireince on any of them, just looking for a general overview

Rookie

3x2 MIMO x 3 dual-band radios in flagshipo Motorola 11n Enterprise AP

OTA testing of MIMO is daunting/$$$

Rookie

no MIMO or SISO experience

 

Rookie

How is TRP and TIS measured for MIMO antennas ?

Rookie

Want to connect RS 232 to slave units

Rookie

Never work with MIMO.

Rookie

Only used MIMO systems as normal user

Rookie

I just worked SISO.

Rookie

No experience in MIMO systems

Rookie

Based on the arrows and definitions, aren't the MISO and SIMO diagrams on slide #9 reversed?

Rookie

ideally a wavelength seperation...

Rookie

printed antennas are less volumetrically efficient, and more suspectible to mnoise ingress/RX problems than 3D antenna structures. Product form-factor often driver of antenna choice (along with # of radio frequeinceis to support, i.e., smartphones & tablets)

Rookie

Is there a minimum distance required for the separation of the antennas?

Rookie

Senior Radio System Engineer now manager

Rookie

Product Manager-Cypress semiconductors!

 

Rookie

Sr. Program Manager,Microsoft. Interested in WiFi and Connectivity Solutions.

Rookie

how well do printed antennas work compared to external

 

Rookie

systems/communications eng, now patent attorney

Rookie

Most chipsets (and PAs, LNAs, FEMs, switches, etc.) are 50-Ohm single-ended. Baluns often part of the mix. Impedance matching of these 50-Ohm parts/traces to antenna launch is main "trick" required...

Rookie

Interest: Business Development, currently focused on TVWS, Silicon Valley

Rookie

Modem FPGA design, microwave backhaul

 

Rookie

Wireless Information Assurance Program Manager - A Component of the DOJ

Rookie

embedded software.. communications

3 cell bands, Bluetooth, GPS, etc

Rookie

She just mentioned matching circuit. I was going to ask about that. In the docs for a zigbee transceiver it just say "matching circuit" between the antenna and the chip. Could Fanny discus this a bit more than she already did?

Rookie

Project Electrical Engineer for new product development at Philips Home Healthcare

Rookie

discipline: electrical engineer - technical translator for Rohde & Schwarz

 

Rookie

Z match is challengling when you may have 4 to 7 bands using the same (fractal) antenna.

Rookie

None at this time.

Rookie

@embedded group:  Reload your browser. If no joy, try Firefox. If nothing, then it's possible your company is blocking live streams

Rookie

HW/Embedded SW engr

Rookie

reflections cause polarity changes

Rookie

Q: I found that many cell towers share Tx and Rx path using diplxer. Is there any reason to share Rx and TX antenna except the cost?

HW/SW R&D Engineer.

Rookie

unable to listen the audio

Mostly a general interest for MIMO - no current development

Rookie

Not one in particular,...

 

None particulary, just looking for general knowledge

Rookie

and, hit play a few times

Rookie

If you lose audio try to reload the page

Rookie

Hardware/Systems engineer for Satellite/Aerospace Company

Rookie

EE, Patent Attorney, Chicago Area

Rookie

No I'm getting no audio.

Rookie

Hardware and R/D for wireless monitoring for renewable energy

Rookie

no audio, can you do webex or go to meeting

Rookie

So, is anyone hearing anything?

Rookie

Is anyone hearing anything ? My audio stream just won't play

Rookie

embedded software and hardware

Rookie

Embedded Development - HW/FW/SW

Rookie

lately mostly high power SMPS and Class D audio amplifiers. Here to learn

Rookie

Are the multipath reflections cancelled by signal strength levels?

Rookie

Hello from Turkey.

Rookie

Embedded development of wireless monitor equipment

Rookie

Embedded SW/HW Engineer

Rookie

Did that yesterday.  Just restarted and it worked ok.

Rookie

Embedded Controls Engineer

Rookie

no audio here either

 

Rookie

Doing more hardware & embedded systems. Interested in Wireless in relation to my hardware work

Rookie

She was talking, but the stream suddenly stopped. Anyone else?

Rookie

Signing in from Dallas, tx.

 

Rookie

No audio stream again. Looks like archived is the only way I'm going to get to do this.  Thanks for nothing IT!

Rookie

Software and hardware. General interest in wireless.

Rookie

My first time here.  Am I supposed to see / hear something?

Thanks

Rookie

We just lose audio?

 

Rookie

Double E, Telecommunication

Rookie

Embedded software, drivers

Rookie

Software Engineer with hardware experience in Thailand.

Rookie

Electrical Engineering, interest in wireless communication

Rookie

Telecommunications Security Engineer

Rookie

R&D design engineer in Broadcast and wireless comm

Rookie

Hardware and software design. Currently working on wireless medical devices

 

Rookie

Mechatronics/Robotics Engineering. Currently busy on  ELMs in a DIP-based setting.

Rookie

Hines, checking in

Rookie

Lead RF Design Engineer: VoWLAN, 11n & 11ac, tade-offs of # of streams vs. battery life/device size...

Rookie

Good afternoon from Canada

Rookie

my discipline: DoD aircraft systems R&D

 

Rookie

Military Systems - System Test - No real design considerations at this time.

Rookie

i have done my master's in microelectronics and i am interset in embedded system

 

Good morning from CA

Rookie

Hello again, Same as yesterday, :)   Mostly hardware design but some software also.

Electrical Engineer designing a new car managment system

Rookie

Electrical Engineer working in OSP Engineering and WiFi Design for Telecommunications Service Provider company

 

Rookie

Im a Hardware Engineer working on smart metering

 

Rookie

Sr. R&D Electronics Technician

Rookie

Embedded Development, Land Mobile Radio

Rookie

Hardware and software support

 

Rookie

Hi from the Netherlands.

Rookie

here we go, audio is up!

Rookie

san diego here. I'm a lot wet behind the ears, so I'm trying to take in as much as possible. Work in test engineering for and aerospace company.

 

Rookie

Greetings from South Africa.

Rookie

Thank you for your link.

Rookie

Greetings from Munich.

 

Rookie

Hello everyone from Ecuador.

 

 

Rookie

Hello From Toronto

Rookie

Greetings from Bahston ... that's Boston if ya don't live here ... Count me as a hdwe/software engr with especial interest in low energy bluetooth ... 

Rookie

here's the link from yesterday's slide 19 on intelligent transportation systems:

http://www.bbc.com/future/story/20121005-building-the-crash-proof-car/1

Rookie

Good morning from Sydney

 

Rookie

Good evening from Iasi

Rookie

Hello from New Jersey

Rookie

Hello from Ireland...

 

Rookie

Good Morning from San Jose, CA.

Freeze Alert this morning!

It's 33°F with a Hi of 57°F.

Rookie

Hello from rainy Tennessee

Rookie

Hello from frosty Silicon Valley ;-)

Rookie

Rodney, North Pole Alaska (Near Fairbanks)

Rookie

Hello from Finland...

Rookie

Hello from San Diego.

Rookie

Hello everybody, I am sherlock ni Vancouver.

 

Rookie

I might not be around for the lecture.  Work is really calling, but can someone ask what is meant by 8 spatial streams for MIMO if each user is using 4 spatial streams and up to 4 users on MU - multi user? from the yesterday's lecture on slide 10?  What are those 8 spatial streams referencing? Or if any of you can answer.  I will look at this when I get back from the archive.  Thank you!!!!

Rookie

Good Morning from New Jersey.

Rookie

Good morning from Scottsdale

Rookie

Yo Fanny, the slides look super

 

Rookie

Morning! Slide 11 is not numbered

 

Rookie


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