Title:
VARIABLE CODER APPARATUS FOR RESONANT POWER CONVERSION AND METHOD
Document Type and Number:
WIPO Patent Application WO2005015746
Kind Code:
A3
Abstract:
A noise-shaping coder with variable or reconfigurable characteristics is disclosed. In one exemplary embodiment, an improved apparatus for signal modulation is disclosed. The apparatus (see figure 1) generally comprises a noise-shaping coder having programmable coefficients, (see figure 1, CSEL), programmable coder order (see figure 1, MSEL), programmable oversampling frequency (see figure 1, CKEN), and/or programmable dither (see figure 1, D). In a second exemplary embodiment, an improved method for implementing noise shaping coding is disclosed. The apparatus generally compromises a means for switching from one order coder to another order coder, as well as switching oversampling frequency.
Inventors:
NORSWORTHY STEVEN R
REDGRAVE JASON RUPERT
REDGRAVE JASON RUPERT
Application Number:
PCT/US2004/025223
Publication Date:
May 19, 2005
Filing Date:
August 04, 2004
Export Citation:
Assignee:
ST MICROELECTRONICS INC (US)
International Classes:
H03M3/00; H03M3/02; H04B14/06; H04L25/49; H03M; (IPC1-7): H04L25/49
Foreign References:
| US6577192B2 | 2003-06-10 | |||
| US6577258B2 | 2003-06-10 | |||
| US6075411A | 2000-06-13 |
Other References:
DAVIS W. A. ET AL.: "Wiley series in microwave and optical engineering", 9 October 2001, article "Radio frequency circuit design, Chapter 9, Section 9.3, 9.4", pages: 178 - 184, XP008084680
PENG K.-C. ET AL.: "A novel EER transmitter using two-point delta-sigma modulation scheme for WLAN and 3G application", MICROWAVE SYMPOSIUM DIGEST, 2002 IEEE MTT-S INTERNATIONAL, vol. 3, 2 June 2002 (2002-06-02) - 7 June 2002 (2002-06-07), pages 1651 - 1654, XP001113923
ATA O.W.: "Predsitortion as an effective technique for linearisation of basestation amplifiers in a mobile radio cellular system", PERSONAL WIRELESS COMMUNICATIONS, 1997 IEEE INTERNATIONAL CONFERENCE, 17 December 1997 (1997-12-17) - 19 December 1997 (1997-12-19), pages 147 - 151, XP010268115
PENG K.-C. ET AL.: "A novel EER transmitter using two-point delta-sigma modulation scheme for WLAN and 3G application", MICROWAVE SYMPOSIUM DIGEST, 2002 IEEE MTT-S INTERNATIONAL, vol. 3, 2 June 2002 (2002-06-02) - 7 June 2002 (2002-06-07), pages 1651 - 1654, XP001113923
ATA O.W.: "Predsitortion as an effective technique for linearisation of basestation amplifiers in a mobile radio cellular system", PERSONAL WIRELESS COMMUNICATIONS, 1997 IEEE INTERNATIONAL CONFERENCE, 17 December 1997 (1997-12-17) - 19 December 1997 (1997-12-19), pages 147 - 151, XP010268115
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