Title:
マルチモード送信器におけるプライミングされたFIRフィルタを用いたランピング
Document Type and Number:
Japanese Patent JP2008547363
Kind Code:
A
Abstract:
A modulation system can switch between two modulation modes. In order to comply with limits on peak power in spectral bands outside the RF operating one the transmitter is required to ramp down to a condition of minimal power. To avoid fixed ramping and trailing bits, the transmitting signal is subjected to FIR filtering. The two FIR filters are primed with a sequence using a parallel input mode before serially entering the information data.
Inventors:
O'Keefe, Connor
Robert O'Sullivan
Plat, patrick
Robert O'Sullivan
Plat, patrick
Application Number:
JP2008519804A
Publication Date:
December 25, 2008
Filing Date:
July 04, 2005
Export Citation:
Assignee:
Freescale Semiconductor, Inc.
International Classes:
H04L27/32
Domestic Patent References:
| JP2005534204A | 2005-11-10 | |||
| JPH10198913A | 1998-07-31 | |||
| JPH10294762A | 1998-11-04 | |||
| JP2005537743A | 2005-12-08 | |||
| JP2005528002A | 2005-09-15 |
Foreign References:
| WO2003036896A2 | 2003-05-01 | |||
| WO2003034676A2 | 2003-04-24 |
Attorney, Agent or Firm:
Kazuo Shamoto
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita