| abstract |
The invention provides an OFDM signal generation method and apparatus, of a transmission system having a first transmitter and a second transmitter. The 5 method comprises: modulating, by the first and second transmitters, each of a plurality of coded blocks to first and second modulated signals sI, s2 respectively, the coded blocks each made up of a plurality of bits by using a predetermined error correction block coding scheme, data included in the first and second modulated signals s1, s2 being the same; inserting, by the first and second 10 transmitters respectively, one or more pilots to the first and second modulated signals sl, s2 to obtain first and second pilot-inserted signal sl',s2'; phase-changing, by the first and second transmitters respectively, while regularly varying a first and second schemes of phase change for each of a plurality of slots, the first and second pilot-inserted signal sl',s2' to obtain first and second 15 transmission signals zl,z2; and converting, by the first and second transmitters respectively, the first and second transmission signal zl,z2 to first and second OFDM signals to be transmitted from first and second antennae at a first period at a first frequency. 8455481_1 (GHMatters) P92233.AU.2 ++ E + L- EN r 4 J 4JJ 0 U o 0co m m (D (D (D I ±O 4U (a CIO C) -C < -.. - 3 Cl V (a CI + <r 4- C-4 E '-.- Co bD 2+ 42 E' E Nt _0 N N 0 co CL bJ3D (U CO. () < 4-co ca 0__ C_ (UD ( -l co |