5G NR Carrier Phase Compensation Option

Hi,

I would like to know if there is an option to enable the carrier phase compensation in the 5G NR Toolbox. As per section 5.4 in 3GPP TS 38.211, the useful part of every OFDM symbol in a subframe starts at zero phase wrt to the carrier signal. But I don't see it happening in the funtions in the toolbox.

So is it present some where that I can use or is there plans to add it in the future? As I see the whole point of the waveform generator is to test it with other NR complient equipments but this component is very important to do so.

Regards,

Sakthivel Velumani

Answer 1

[Sriram Tadavarty]

Hi Sakthivel,

From MATLAB R2020b, the 5G waveform can be generated through nrWaveformGenerator function. This function takes a downlink carrier configuration object, nrDLCarrierConfig, as an input which has a CarrierFrequency property that does the phase compensation before OFDM modulation.

The support for 5G uplink waveform is through an uplink carrier configuration object nrULCarrierConfig. A similar property is present even here for the same support. Note this support of nrULCarrierConfig is only from MATLAB R2021a.

Hope this helps.

Regards,

Sriram

[Sriharsha Korada]

@Sriram Tadavarty In the olderversions, i.e before MATLAB 2020b, signals generated are without any phase precompensation, meaning at carrier frequency is zero??

Best Regards,

Sri