Patent ID: 11968067
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of signalling in a Wireless Local Area Network, WLAN, the method comprising:
transmitting, at a first wireless device of the WLAN, a signal comprising a physical layer data unit via a wireless channel of the WLAN using plural subcarriers spaced across plural symbols, the physical layer data unit comprising a data packet and a preamble, the preamble comprising:
a synchronisation part comprising a channel estimation part:
the channel estimation part comprising N training symbols,

where N is an integer greater than 1,
the N training symbols comprising synchronisation information for synchronising a second wireless device with the first wireless device, the synchronisation information comprising an offset value, and
synchronisation information transmitted in second and subsequent training symbols is transmitted using offset subcarriers, the offset subcarriers being frequency offset with respect to reference subcarriers used to transmit synchronisation information in a first training symbol, the frequency offset being equal to the offset value.