US Patent Issued to Telefonaktiebolaget LM Ericsson on June 10 for "Preamble signal for wakeup communication in a wireless communication system" (Swedish Inventors)

ALEXANDRIA, Va., June 18 -- United States Patent no. 12,328,674, issued on June 10, was assigned to Telefonaktiebolaget LM Ericsson (publ) (Stockholm).

"Preamble signal for wakeup communication in a wireless communication system" was invented by Henrik Sjoland (Lund, Sweden) and Leif Wilhelmsson (Lund, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method performed in a base station for frequency calibration of a receiver is disclosed. The base station generates a first signal with periodic ASK modulation and transmits the first signal as a preamble or frequency marker signal to facilitate frequency calibration of the receiver. The receiver sweeps its oscillator frequency to detect if there is a pre...