US 12,470,265 B2
Signal processing method
Andrew Lord, London (GB); Anas Al Rawi, London (GB); and Neil Parkin, London (GB)
Assigned to BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY, London (GB)
Appl. No. 18/261,707
Filed by BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY, London (GB)
PCT Filed Dec. 17, 2021, PCT No. PCT/EP2021/086580
§ 371(c)(1), (2) Date Jul. 17, 2023,
PCT Pub. No. WO2022/152508, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 2100613 (GB), filed on Jan. 18, 2021.
Prior Publication US 2024/0072853 A1, Feb. 29, 2024
Int. Cl. H04K 1/10 (2006.01); H04B 7/0456 (2017.01); H04L 27/28 (2006.01)
CPC H04B 7/0456 (2013.01) 11 Claims
OG exemplary drawing
 
1. A method of transmitting precoded signals, the method comprising:
precoding an optical signal to produce a precoded optical signal;
transmitting a precoded optical signal over an optical portion of a first transmission channel;
converting the precoded optical signal to a first multiple-input multiple-output (MIMO) signal;
transmitting the first MIMO signal over a wireless portion of the first transmission channel;
transmitting the precoded optical signal over an optical portion of a second transmission channel;
converting the precoded optical signal to a second MIMO signal; and
transmitting the second MIMO signal over a wireless portion of the second transmission channel,
wherein the precoding takes account of both first channel state information associated with the first transmission channel and second channel state information associated with the second transmission channel,
wherein precoding the optical signal comprises multiplying the optical signal by a precoder matrix derived from a first channel matrix containing the first channel state information and a second channel matrix containing the second channel state information.