Invention Grant
- Patent Title: Method and apparatus for generating constant envelope modulation using a quadrature transmitter
- Patent Title (中): 使用正交发射机产生恒定包络调制的方法和装置
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Application No.: US11618772Application Date: 2006-12-30
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Publication No.: US07864882B2Publication Date: 2011-01-04
- Inventor: George C. Anderson , Jose E. Korneluk , Gregory S. Raven
- Applicant: George C. Anderson , Jose E. Korneluk , Gregory S. Raven
- Applicant Address: US IL Libertyville
- Assignee: Motorola Mobility, Inc.
- Current Assignee: Motorola Mobility, Inc.
- Current Assignee Address: US IL Libertyville
- Agent Scott M. Garrett; Sylvia Chen
- Main IPC: H04L25/49
- IPC: H04L25/49 ; H04L27/20 ; H04L27/36 ; H03C1/06
Abstract:
A multi-mode communication device (100) uses a quadrature transmitter (102) for transmitting both amplitude and constant envelope angle-modulated signals. For angle modulation, a separate feedback path is used from that used for amplitude modulated signal transmission. An FM receiver (136) is used to produce error signals (214, 216) used in correcting the I and Q quadrature signals (206, 208).
Public/Granted literature
- US20080160933A1 METHOD AND APPARATUS FOR GENERATING CONSTANT ENVELOPE MODULATION USING A QUADRATURE TRANSMITTER Public/Granted day:2008-07-03
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