|
From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] Spectrum Management in cognitive radio |
Date: | Wed, 6 Apr 2016 21:55:18 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
Hi Biswas,If there are a number of ways, then please describe the best possible way solve this problem."First of all, what you're describing is barely cognitive; you want to look at the momentaneous power in a subchannel, and transmit only when it's free. That principle is simply known as Carrier Sense Collision Avoidance, and present in a lot non-cognitive communication methods. Cognitivity requires that you can use your channel observations to build a model of channel usage, and if possible, employ that to schedule your transmissions. Ankit Kaushik from KIT as some work on reinforcement learning strategies for that. Now, you already have a pretty usable description of your system: Basically I need to link the output from the threshold block from the energy detector flow graph with that of the USRP source such that the USRP transmits at a frequency where the threshold block outputs a zero value.Well, you will need to write a block that takes the output of your energy detection and produces a sample stream based on that, which might be 0 as long as you're not transmitting, and nonzero if you're using the channel. You said you've read the tutorials – these cover writing blocks, and so I think it'd be helpful if you did some experimentation on your own and then discuss the questions that arose from that! Best regards, Marcus On 02.04.2016 15:25, Prabaha Biswas
wrote:
This is our conversation from last month: |
[Prev in Thread] | Current Thread | [Next in Thread] |