Patent ID: 7212578

Claim:
A UTRAN (UMTS (Universal Mobile Telecommunication System) Terrestrial Radio Access Network) transmitter in a mobile communication system having at least four antennas, comprising: a first adder connected to a first antenna that adds a first spread signal, obtained by spreading a first symbol pattern with a first orthogonal code, to a second spread signal obtained by spreading the first symbol pattern with a second orthogonal code; a second adder connected to a second antenna that adds the first spread signal to a third spread signal obtained by spreading a first inverted symbol pattern obtained by phase-inverting the first symbol pattern with the second symbol pattern; a third adder connected to a third antenna that adds a fourth spread signal, obtained by spreading a second symbol pattern being orthogonal with the first symbol pattern with the first orthogonal code, to a fifth spread signal obtained by spreading the second symbol pattern with the second orthogonal code; a fourth adder connected to a fourth antenna that adds the fourth spread signal to a sixth spread signal obtained by spreading a second inverted symbol pattern obtained by phase-inverting the second symbol pattern with the second orthogonal code; a fifth adder connected to a fifth antenna that adds a seventh spread signal obtained by spreading the first symbol pattern with a third orthogonal code, to an eighth spread signal obtained by spreading the first symbol pattern with a fourth orthogonal code; a sixth adder connected to a sixth antenna that adds the seventh spread signal to a ninth spread signal obtained by spreading the first inverted symbol pattern with the fourth orthogonal code; a seventh adder connected to a seventh antenna that adds a tenth spread signal, obtained by spreading the second symbol pattern with the third orthogonal code, to an eleventh spread signal obtained by spreading the second symbol pattern with the fourth orthogonal code; and an eighth adder connected to an eighth antenna that adds the tenth spread signal to a twelfth spread signal obtained by spreading the second inverted symbol pattern with the fourth orthogonal code.