[srslte-users] Is there a pulse shaping after OFDM modulation in LTE or NBIoT?

[cgl1428719317 at 163.com]

Just as the title says. I have searched for a whole day and haven't found any confidential materials to verify whether there is a pulse shaping after OFDM modulation in NB-IoT or LTE?
For example, in https://www.nxp.com/docs/en/white-paper/3GPPEVOLUTIONWP.pdf in page 15, it mentioned that there is a procedure named, Cyclic prefix and pulse shaping. And the purpose is desripted as "pulse shaping is employed to prevent spectral regrowth.", However, which kind of pulse shaping is unclear.
Besides, I have browsed the referred materials listed in the end of the paper, for most likely references:
3GPP TS 36.201 ¨C v1.0.0, LTE Physical Layer ¨C General Description,http://www.3gpp.org/ftp/Specs/archive/36%5Fseries/36.201/
3GPP TS 36.211 ¨C v1.0.0, Physical Channels and Modulation,http://www.3gpp.org/ftp/Specs/archive/36%5Fseries/36.211/
3GPP TS 36.212 ¨C Multiplexing and Channel Coding,http://www.3gpp.org/ftp/Specs/archive/36%5Fseries/36.212/
3GPP TS 36.213 ¨C v1.0.0, Physical Layer Procedures,http://www.3gpp.org/ftp/Specs/archive/36%5Fseries/36.213/
However, there is still no description about the kind of pulse shaping after OFDM modulation. In other words, if I want to send out the NB-IoT signal (which is much similar with LTE) after OFDM modulated, how can I implement it before DAC? Any help would be appreciated!
More specifically, is there a formal equation for every transmitted signals? For example, if we use the sine wave as the pulse shape, then the sended out signal can be expressed as a sine function.



cgl1428719317 at 163.com
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