Title:
多元変調送信器のための方法と装置
Document Type and Number:
Japanese Patent JP4440766
Kind Code:
B2
Abstract:
A dual modulation transmitter apparatus ( 100 ) includes first ( 134 ), second ( 136 ), and third ( 132 ) signal paths. The first signal path includes a polar modulator ( 120 ) coupled to a data input ( 115 ). The second signal path includes a quadrature modulator ( 122 ) coupled to the data input. The third signal path is coupled to an antenna ( 142 ) and includes a switch ( 128 ) configured to couple the third signal path to the first signal path under a first condition and to couple the third signal path to the second signal path under a second condition. Thus, the transmitter apparatus enjoys the best of both worlds, since it utilizes quadrature or polar modulation in the most appropriate circumstances.
Inventors:
Ballantine, Gary Jay
Application Number:
JP2004507217A
Publication Date:
March 24, 2010
Filing Date:
May 15, 2003
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04B1/04; H04B1/40; H04L1/00; H04L27/00
Domestic Patent References:
| JP2004048703A | ||||
| JP2001339458A | ||||
| JP9083600A | ||||
| JP2001103114A | ||||
| JP2001313685A |
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto