FIELD: radio engineering, communication.
SUBSTANCE: communication device comprises a phase vector assigning unit which assigns a first phase vector to a plurality of subcarriers relating to a preamble, and assigns a second phase vector to a plurality of subcarriers relating to a postamble, wherein the first phase vector differs from the second phase vector.
EFFECT: providing communication device which performs postamble which does not require any symbol synchronisation, providing a communication device which can reliably determine presence or absence of postamble if synchronisation is not achieved, and which enables to transmit a packet of required length to a network on which there are multiple terminals.
25 cl, 32 dwg
