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rick merritt
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Blogger
SDR, cognitive nets
rick merritt   4/30/2014 11:02:27 AM
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As I recall software-defined radio and cognitive radio have been hammering on the technology behind this concept for years. Where are we at with it now?

LarryM99
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CEO
Re: SDR, cognitive nets
LarryM99   4/30/2014 6:03:22 PM
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@Rick, I was trying to follow these technologies for a while, but there does not seem to have been much happening lately. The last I heard was that a database had been approved for specific locations to avoid using it - mostly stadiums and theaters. I also know that California was trying to allocate some decent new ISM spectrum space which could be used, but that seems to have gone quiet as well. Other than that, I am not sure what is happening.

pflynn
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Rookie
Re: SDR, cognitive nets
pflynn   5/1/2014 10:43:39 AM
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As more specturm become avialable for shared use the importance of cognitive radio and Software Defined Radios (SDR) become ever more urgent. These bands, which will be distributed across a wide range of specturm, will have unique characteristics and constraints which will vary around the world. Successful devices will need to operate in multiple bands, under various policy restrictions and be able to aggregate non-continguous bands to accomoate the high demand for capacity. And these devices may need to change to different bands with only a few minutes of notice.

This adaptability and agility is at the heart of the what cognitive radio and SDR is all about. Highly integrated SoC processors are available today which can accomplish layer 1,2 and 3 processing requried by SDR in a single chip. For example, the new TI device is ideal for this application, TCI6630K2L .... sorry for the blantant plug, but it is a sweet chip!

baybal
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Rookie
Re: SDR, cognitive nets
baybal   5/1/2014 12:05:46 PM
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When I lived in Russia during 2002, there was a small town with 9 different cellular operators and 2 independent mobile internet providers (yes, in GSM, internet and voice services can come from different companies on same channel). I wasn't surprising that even back then, cellular service there was already cheaper that in US.

krisi
User Rank
CEO
Re: SDR, cognitive nets
krisi   5/1/2014 12:50:26 PM
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9 different cell operators in a small town can't be cost efficient

baybal
User Rank
Rookie
Re: SDR, cognitive nets
baybal   5/1/2014 12:53:23 PM
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May be. As I know, there are only 3 left now.

krisi
User Rank
CEO
Re: SDR, cognitive nets
krisi   5/1/2014 1:00:59 PM
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That makese sense. 3 is the right number in most capital intensive business...there were 9 as they fighting for market share and 6 dropped...I bet prices are now higher...classic

rick merritt
User Rank
Blogger
Re: SDR, cognitive nets
rick merritt   5/1/2014 2:56:02 PM
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@pflynn: I know TI has been working on SDR and cognitive radio chips for years...but is this technology deplyed in any mainstream cellular nets? What are the hurdles besides what the blogger mentions here in regulaitons?

rick merritt
User Rank
Blogger
Re: SDR, cognitive nets
rick merritt   5/1/2014 3:00:36 PM
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@Larry: Wow, why are we in this situation where no one is working on it?

pflynn
User Rank
Rookie
Re: SDR, cognitive nets
pflynn   5/1/2014 3:05:28 PM
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@rick: In short, yes. There are several deployments of our TCI66xx architecture in the market today for WCDMA and now LTE solutions which are able to handle multiple bands simultaneously. Vendors are just beginning to apply this technology to backhaul and unlicensed shared specturm solutions.

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