US 12,284,007 B2
PAPR reduction of MIMO-OFDM
Lijun Wang, Zhejiang (CN); and Weiqiang Mao, Zhejiang (CN)
Assigned to NOKIA SOLUTIONS AND NETWORKS OY, Espoo (FI)
Appl. No. 17/285,597
Filed by NOKIA SOLUTIONS AND NETWORKS OY, Espoo (FI)
PCT Filed Nov. 5, 2018, PCT No. PCT/CN2018/113987
§ 371(c)(1), (2) Date Apr. 15, 2021,
PCT Pub. No. WO2020/093203, PCT Pub. Date May 14, 2020.
Prior Publication US 2021/0399935 A1, Dec. 23, 2021
Int. Cl. H04B 7/0413 (2017.01); H04L 27/26 (2006.01); H04W 72/0453 (2023.01)
CPC H04B 7/0413 (2013.01) [H04L 27/2623 (2013.01); H04W 72/0453 (2013.01); H04L 27/2626 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method implemented at a network device, said method comprising:
generating sequences of Orthogonal Frequency Division Multiplexing (OFDM) symbols on subcarriers on a downlink channel from the network device to a terminal device;
determining a processing matrix of the downlink channel at least partially based on characteristics of the downlink channel;
obtaining reference values of parameters of a signal generation model;
iteratively performing the following for a number of times:
adjusting, based on the sequences of Orthogonal Frequency Division Multiplexing (OFDM) symbols and the processing matrix, the reference values of the parameters of the signal generation model, the parameters being signals for transmitting via transmitting ports of the network device on the downlink channel to the terminal device; and
updating the reference values of the parameters of the signal generation model by clipping the adjusted reference values of the parameters of the signal generation model;
obtaining the updated values as the reference values; and
adjusting the reference values of the parameters of the signal generation model based on the sequences of Orthogonal Frequency Division Multiplexing (OFDM) symbols and the processing matrix, and based on the updated reference values of the parameters of the signal generation model.