How to generate wide band OFDM signal using signal aggregation method?

I'm able to genrate OFDM signal with BW=20 MHz as shown in the following figure

I wanna build wide band OFDM signal by signal aggregation methods as shown in the following figure

How to do so using MATLAB?

Answer 1

[Sindhu Karri]

Refer to below links for information regarding carrier aggregation:

https://www.mathworks.com/help/lte/ug/uplink-carrier-aggregation-waveform-generation-demodulation-and-analysis.html

https://www.mathworks.com/help/lte/ug/release-12-downlink-carrier-aggregation-waveform-generation-demodulation-and-analysis.html

[Abdelwahab Afifi]

Thanks. It helps a lot