US 11,864,218 B1
5G new radio uplink intermodulation distortion mitigation
Ming Shan Kwok, Seattle, WA (US); and Wafik Abdel Shahid, Bellevue, WA (US)
Assigned to T-Mobile USA, Inc., Bellevue, WA (US)
Filed by T-Mobile USA, Inc., Bellevue, WA (US)
Filed on Jun. 10, 2021, as Appl. No. 17/344,621.
Int. Cl. H04W 72/541 (2023.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01)
CPC H04W 72/541 (2023.01) [H04L 5/001 (2013.01); H04L 27/2605 (2013.01); H04L 27/2627 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A non-transitory computer-readable storage medium comprising instructions recorded thereon that, when executed by at least one data processor of a system of a wireless communication network, cause the system to perform a method of determining waveforms for uplink (UL) transmissions in a mobile device operating in the wireless communications network, the method comprising:
receiving signals identifying UL frequency resources scheduled to the mobile device for concurrent UL transmissions;
receiving signals identifying downlink (DL) frequency resources scheduled to the mobile device for DL transmissions; and,
automatically determining, based on the UL and DL frequency resources, a waveform for use by the mobile device for the concurrent UL transmissions,
wherein the determining is based on a frequency of an intermodulation distortion (IMD) product of two or more frequencies of the UL frequency resources,
wherein the mobile device is to use a Discrete Fourier Transform (DFT)-spread Orthogonal Frequency Division Multiplexing (OFDM) (DFT-s-OFDM) waveform for the concurrent UL transmissions when the frequency of the IMD product is within the DL frequency resources, and
wherein the mobile device can use a Cyclic Prefix (CP) OFDM (CP-OFDM) waveform for the concurrent UL transmissions when the frequency of the IMD product is not within the DL frequency resources.