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From: | Sumit Kumar |
Subject: | Re: [Discuss-gnuradio] Successive Interference Cancellation using GR |
Date: | Tue, 7 Nov 2017 21:23:36 +0100 |
I want to implement a system where I will receive overlapped wifi and zigbee on the same channel using same RF front end. Then in the base band I wish to do interference cancellation.I understand that most of the time wifi is stronger than zigbee.So if the preamble of wifi is not damaged, I will be able to get the channel estimates of wifi.Hopefully if the wifi frame has not suffered much due to interference of zigbee(which is very much possible), I can decode and regenerate the wifi signal using my channel estimates.Then I will subtract this regenerated wifi signal from the mixed signal (wifi + zigbee).The residue should give me a relative clean signal from which decoding of zigbee might be possible.Here is graphic for reference:y1 is a received signal which is x1 + x2. + noise.First we demodulate x2 (probably because it is stronger), then re modulate it. Then subtract it from y1 and then decode x1.RegardsSumitOn Thu, Nov 2, 2017 at 9:02 PM, Marcus Müller <address@hidden> wrote:Hi Sumit,
I wrote that but can't remember the context (it seems there was some).
So, maybe, let's start from scratch. What is it that you want to implement as a whole that includes Successive Interference Cancellation? What is the application you're building?
Best regards,
Marcus
On 02.11.2017 20:56, Sumit Kumar wrote:
Hi,
I was looking for some previous work and I found this link
where Marcus replied about the difficulty to realize such module in GR.
I am sorry but I could't understand it properly.
Can someone elaborate it :)
I plan to perform SIC on a 802.15.4 waveform which is corrupted by 802.11 and vice versa.
Regards
Sumit
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