(11)EP 2 264 933 A3


(88)Date of publication A3:
17.05.2017 Bulletin 2017/20

(43)Date of publication A2:
22.12.2010 Bulletin 2010/51

(21)Application number: 10012300.9

(22)Date of filing:  22.02.2001
(51)Int. Cl.: 
H04L 1/00  (2006.01)
(84)Designated Contracting States:

(30)Priority: 25.02.2000 JP 2000048856
20.10.2000 JP 2000320627

(62)Application number of the earlier application in accordance with Art. 76 EPC:
01104308.0 / 1128586

(71)Applicant: Panasonic Intellectual Property Corporation of America
Torrance, CA 90503 (US)

  • Murakami, Yutaka
    Osaka 540-6207 (JP)
  • Takabayashi, Schinichiro
    Osaka 540-6207 (JP)
  • Abe, Katsuaki
    Osaka 540-6207 (JP)
  • Orihashi, Masayuki
    Osaka 540-6207 (JP)
  • Matsuoka, Akihiko
    Osaka 540-6207 (JP)

(74)Representative: Grünecker Patent- und Rechtsanwälte PartG mbB 
Leopoldstraße 4
80802 München
80802 München (DE)


(54)Digital radio communication system and method

(57) QPSK modulated quadrature baseband signal generating section 301 generates a QPSK modulated quadrature baseband signal. 8PSK modulated quadrature baseband signal generating section 302 generates an 8PSK modulated quadrature baseband signal. Based on the modulation scheme determined information, in-phase component switching section 304 and quadrature component switching section 305 switch between the QPSK modulated quadrature baseband signal, 8PSK modulated quadrature baseband signal and pilot symbol to output to radio section 306. Radio section 306 performs the predetermined radio processing on the baseband signal to output a transmission signal. The transmission signal is amplified in power amplifier 307, and the amplified transmission signal is transmitted from transmission antenna 309. It is thereby possible to take into account both the improvement in the data transmission rate, and the benefit and convenience in terminals.