US 11,811,572 B2
Systems and methods for multi-carrier or multi-band low-PAPR precoding that handle cyclic prefix
Pierre-Andre Laporte, Gatineau (CA); and Mark Edward Rollins, Stittsville (CA)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Aug. 5, 2022, as Appl. No. 17/882,161.
Application 17/882,161 is a continuation of application No. 17/288,042, granted, now 11,588,674, previously published as PCT/IB2018/058413, filed on Oct. 26, 2018.
Prior Publication US 2022/0393925 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/02 (2018.01); H04L 27/26 (2006.01); H04B 7/0456 (2017.01)
CPC H04L 27/2615 (2013.01) [H04B 7/0456 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of operation of a Multiple Input Multiple Output, MIMO, Orthogonal Division Multiplexing, OFDM, transmitter system, comprising:
for each carrier of two or more carriers, performing precoding of a plurality of frequency-domain input signals for the carrier to provide a plurality of frequency-domain precoded signals for the carrier, the plurality of frequency-domain input signals for the carrier being for a plurality of transmit layers for the carrier, respectively; and
processing the two or more pluralities of frequency-domain precoded signals for the two or more carriers, respectively, in accordance with a multi-carrier processing scheme to provide a plurality of multi-carrier time-domain transmit signals for a plurality of antenna branches, respectively, of the MIMO OFDM transmitter system, the multi-carrier processing scheme providing Peak-to-Average Power Ratio, PAPR, reduction for Cyclic Prefixes, CPs, of the plurality of multi-carrier time-domain transmit signals for the plurality of antenna branches;
wherein processing the two or more pluralities of frequency-domain precoded signals for the two or more carriers, respectively, in accordance with the multi-carrier processing scheme, comprises:
performing, in a forward direction, CP insertion within each iteration of the multi-carrier processing scheme; and
performing, in a reverse direction, CP removal, wherein, in order to perform CP removal, the processing circuitry is further operable to, for each symbol:
combining a first-CP portion of the symbol that corresponds to the CP and a second-CP portion of the symbol that corresponds to samples from which the CP was derived into a new second-CP portion of the symbol; and
remove the first-CP portion of the symbol.