How can I create an OFDM signal with set subcarrier spacing

Question

Paul Peterson 2023-7-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1997593-how-can-i-create-an-ofdm-signal-with-set-subcarrier-spacing

回答： Supraja 2023-7-27

OFDM_IQfile.m

I am trying to generate an OFDM signal with the following parameters

% OFDM Parameters

totalSubcarriers = 64;

occupiedSubcarriers = 53;

subcarrierSpacing = 312.5e3;

sequenceLength = 10; -> symbols

cyclicPrefixLength = 16; -> samples

modulationScheme = 'QPSK';

6 guard subcarriers on the left and 5 on the right.

I feel like I am doing this correct but i wonder if I am doing the guard carriers correctly. The end goal is to play this out an a vector signal generator and when I currently do that I don't see what i would expect.

Any help on what I am doing wrong?

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Answer 1

Supraja 2023-7-27

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1997593-how-can-i-create-an-ofdm-signal-with-set-subcarrier-spacing#answer_1279767

I understand that you want to generate the OFDM signal with its parameters.

You can go through the documentation link of the OFDM modulator whose documentation link is attached here:

https://www.mathworks.com/help/wireless-hdl/ref/ofdmmodulator.html?searchHighlight=generate%20OFDM%20vector%20signals&s_tid=srchtitle_support_results_1_generate%20OFDM%20vector%20signals

Hope this helps!