US 12,074,733 B2
Method and apparatus for phase-aided adaptive modulation
Martin Sjödin, Gothenburg (SE); and Björn Gävert, Gothenburg (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/630,750
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jul. 29, 2019, PCT No. PCT/SE2019/050714
§ 371(c)(1), (2) Date Jan. 27, 2022,
PCT Pub. No. WO2021/021007, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2022/0263687 A1, Aug. 18, 2022
Int. Cl. H04L 25/02 (2006.01); H04L 27/34 (2006.01)
CPC H04L 25/0224 (2013.01) [H04L 27/3455 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A transceiver for phase-aided communication, the transceiver comprising a radio transmitter configured to transmit a message comprising channel symbols from a primary and a secondary set of channel symbols, wherein:
the primary set of channel symbols comprises channel symbols having different phase with respect to one another;
the secondary set of channel symbols comprises only channel symbols with a fixed known phase, wherein the channel symbols of the secondary set have a minimum signal energy that is dependent on signal-to-noise-ratio or signal-to-interference-and-noise-ratio; and
the primary set is the default channel symbol set and the secondary set is selected based on a predetermined sequence or with regard to the level of phase noise.