FIELD: information technology.
SUBSTANCE: receiver designed for receiving a downlink signal transmitted to a cell, enables to obtain time, carrier frequency and cell-specific preamble synchronisation to the received signal and includes multiple synchronisation units which include a first detector to detect a frame boundary using preamble delay correlation; a second detector to detect the frame boundary with greater precision using a conjugate symmetry property over a region identified by the first detector; a cyclic prefix correlator to detect symbol boundary repetition; an estimator, using the cyclic prefix, to estimate and correct a fractional carrier frequency offset; apparatus for performing a fast Fourier transform of an identified preamble symbol and a frequency domain cross-correlator to identify cell-specific preamble sequences and an integer frequency offset in sub-carrier spacing. The transmitted signal can be a downlink signal transmitted to the cell from a base station which is compatible with IEEE 802.16e.
EFFECT: higher synchronisation accuracy.
37 cl, 18 dwg, 3 tbl
