16QAM-OFDM Modulator using Comm Toolbox in Simulink, What is the Number of Symbols?
3 次查看(过去 30 天)
显示 更早的评论
I would like to build a 16QAM Coded OFDM Time Signal. Mainly to mimic an LTE 20MHz BW signal up converted to 800MHz for use in an RF model I'm building in Simulink.
I was going to have a random datastream of Fs = 20MHz that is then coded using the "Rectangular QAM Modulator BB Block" which then is inputted to the OFDM modulator to get the OFDM signal out. Then I would upsample using the Raised Cosine Filter to a proper sample rate to up convert to 800MHz. The problem I am running into is what the "Number of OFDM Symbols" is.
Do I need to convert the QAM serial signal into Parallel data streams first? Say my sample per frame is 20, I could then parallel this into 10x2 which is an FFT size of 10 (assuming no guard bands or DC null), and 2 symbols?
I guess I'm confused by the meaning of "Number of Symbols" even though it says it's the number of symbols in the time frequency grid.
2 个评论
回答(1 个)
Chandresh Vora
2016-6-6
Here is an example in the product that shows the use of QAM Baseband Modulator with OFDM Modulator - hope this helps.
Thanks, Chandresh Vora
2 个评论
Meshal Sinnen
2019-4-10
Hey Chandresh the link you shared doesn't work anymore - do you have any other link. I am trying to achieve the same thing as Nicco
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 OFDM 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!