CA2122735A1 - Oscillator Frequency Divide-Down Transmit Offset Scheme for Reducing Self-Quieting - Google Patents
Oscillator Frequency Divide-Down Transmit Offset Scheme for Reducing Self-QuietingInfo
- Publication number
- CA2122735A1 CA2122735A1 CA 2122735 CA2122735A CA2122735A1 CA 2122735 A1 CA2122735 A1 CA 2122735A1 CA 2122735 CA2122735 CA 2122735 CA 2122735 A CA2122735 A CA 2122735A CA 2122735 A1 CA2122735 A1 CA 2122735A1
- Authority
- CA
- Canada
- Prior art keywords
- frequency
- quieting
- communication device
- oscillator frequency
- radio communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/405—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with multiple discrete channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
- H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2215/00—Reducing interference at the transmission system level
- H04B2215/064—Reduction of clock or synthesizer reference frequency harmonics
Abstract
A radio communication device, having a receive mode and a transmit mode, includes a receiver portion, a transmitter portion, and multiple oscillators for providing reference waveforms for the radio communication device. During the receive mode, the receiver portion receives signals having a selected frequency, converts received signals to at least a first intermediate frequency (IF), and a transmitter oscillator produces a first waveform having a frequency equal to a multiple of the first intermediate frequency during the receive mode. During the transmit mode, the transmitter portion requires a reference waveform having an offset frequency equivalent to the first IF frequency to produce a radio frequency signal. Thus, the radio communication device also comprises a divider coupled to the transmitter oscillator for dividing the frequency of the first waveform to the required offset frequency in the transmit mode.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/787,279 US5276915A (en) | 1991-11-04 | 1991-11-04 | Transceiver having a divide-down transmit offset scheme |
US07/787,279 | 1991-11-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2122735A1 true CA2122735A1 (en) | 1993-05-13 |
CA2122735C CA2122735C (en) | 1998-12-22 |
Family
ID=25140967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002122735A Expired - Fee Related CA2122735C (en) | 1991-11-04 | 1992-10-30 | Oscillator frequency divide-down transmit offset scheme for reducing self-quieting |
Country Status (6)
Country | Link |
---|---|
US (1) | US5276915A (en) |
EP (1) | EP0654192B1 (en) |
AT (1) | ATE162674T1 (en) |
CA (1) | CA2122735C (en) |
DE (1) | DE69224216D1 (en) |
WO (1) | WO1993009606A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06152467A (en) * | 1992-11-06 | 1994-05-31 | Nec Corp | Radio communication equipment |
JPH06216802A (en) * | 1993-01-13 | 1994-08-05 | Kyocera Corp | Transmitting/receiving device |
JP2675747B2 (en) * | 1993-03-26 | 1997-11-12 | 日立電子株式会社 | transceiver |
US5511236A (en) * | 1993-12-07 | 1996-04-23 | National Semiconductor Corporation | Half duplex RF transceiver |
US5590413A (en) * | 1994-01-14 | 1996-12-31 | Sun Microsystems, Inc. | Radio transceiver having shared modulation and demodulation mixer circuits |
US5787344A (en) | 1994-06-28 | 1998-07-28 | Scheinert; Stefan | Arrangements of base transceiver stations of an area-covering network |
JP3252653B2 (en) * | 1995-06-05 | 2002-02-04 | 三菱電機株式会社 | Transceiver |
US6839548B1 (en) | 1996-03-01 | 2005-01-04 | International Business Machines Corporation | Radio transmitter |
KR20000069896A (en) * | 1997-11-06 | 2000-11-25 | 요트.게.아. 롤페즈 | A transceiver and a telecommunication system having a transceiver |
GB2343567B (en) * | 1998-11-05 | 2002-03-20 | Nec Technologies | Digital transmit loop |
US6516184B1 (en) * | 1999-08-31 | 2003-02-04 | Skyworks Solutions, Inc. | Multi-band transceiver having multi-slot capability |
US8532588B1 (en) | 2002-08-13 | 2013-09-10 | The Connectivity Patent Trust | Apparatus for signal power loss reduction in RF communication systems |
US7212788B2 (en) * | 2002-08-13 | 2007-05-01 | Atheros Communications, Inc. | Method and apparatus for signal power loss reduction in RF communication systems |
US7555275B2 (en) * | 2006-04-14 | 2009-06-30 | Viasat, Inc. | Systems, methods and devices for dual closed loop modulation controller for nonlinear RF amplifier |
US8044734B2 (en) * | 2008-08-01 | 2011-10-25 | Qualcomm Incorporated | Method and apparatus for mitigating VCO pulling |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3324396A (en) * | 1964-09-28 | 1967-06-06 | Bell Telephone Labor Inc | Multiple conversion transceiver utilizing single oscillator |
US4551856A (en) * | 1983-05-16 | 1985-11-05 | Motorola, Inc. | Synthesized multiple conversion receiver system with provision for avoiding receiver self-quieting spurious response |
US4512035A (en) * | 1983-05-16 | 1985-04-16 | Motorola, Inc. | Method of programming a synthesizer ROM for elimination of receiver self-quieting |
GB2155263A (en) * | 1984-03-02 | 1985-09-18 | Philips Electronic Associated | Frequency synthesised multichannel radio apparatus |
JPS63131644A (en) * | 1986-11-20 | 1988-06-03 | Pioneer Electronic Corp | Psk transmitter |
US4879758A (en) * | 1987-01-02 | 1989-11-07 | Motorola, Inc. | Communication receiver system having a decoder operating at variable frequencies |
DE3887204T2 (en) * | 1987-05-27 | 1994-07-07 | Fujitsu Ltd | Digital bi-directional radio transmission system using a single frequency. |
GB8806194D0 (en) * | 1988-03-16 | 1988-04-13 | Shaye Communications Ltd | Transceivers |
-
1991
- 1991-11-04 US US07/787,279 patent/US5276915A/en not_active Expired - Lifetime
-
1992
- 1992-10-30 WO PCT/US1992/009304 patent/WO1993009606A1/en active IP Right Grant
- 1992-10-30 AT AT92923284T patent/ATE162674T1/en not_active IP Right Cessation
- 1992-10-30 EP EP92923284A patent/EP0654192B1/en not_active Expired - Lifetime
- 1992-10-30 DE DE69224216T patent/DE69224216D1/en not_active Expired - Lifetime
- 1992-10-30 CA CA002122735A patent/CA2122735C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5276915A (en) | 1994-01-04 |
ATE162674T1 (en) | 1998-02-15 |
DE69224216D1 (en) | 1998-02-26 |
EP0654192B1 (en) | 1998-01-21 |
EP0654192A1 (en) | 1995-05-24 |
WO1993009606A1 (en) | 1993-05-13 |
EP0654192A4 (en) | 1995-09-27 |
CA2122735C (en) | 1998-12-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2122735A1 (en) | Oscillator Frequency Divide-Down Transmit Offset Scheme for Reducing Self-Quieting | |
EP1350333B8 (en) | Local oscillator leakage control in direct conversion processes | |
MY114286A (en) | Dual-mode digital fm communication system | |
MY114196A (en) | Communication system | |
MY125418A (en) | "in-building radio-frequency coverage" | |
TW242722B (en) | ||
MY117165A (en) | Transmitter and automobile audio apparatus using the same | |
IE900871L (en) | Frequency control apparatus for a digital radio receiver | |
WO1997044921A3 (en) | Method and apparatus for communicating information using a data tuner | |
EP0729238A3 (en) | Transmitter and transceiver | |
AU6001800A (en) | Adjustable filter | |
PL295855A1 (en) | Receiver, transmitter and translator of a common radio communication system | |
CA2072792A1 (en) | Radio transceiver and related method of frequency control | |
FI932699A (en) | A method for testing a transceiver unit and a base station for a time division radio system | |
GB9518098D0 (en) | An antenna used for the transmission or the reception of a radio frequency signal, a transmitter and a remote control receiver, and a remote control system | |
CA2102565A1 (en) | Radio Communication Apparatus Capable of Isolating a Receiver from a Transmitter During a Reception Operation | |
AU6846298A (en) | Closed-loop synchronisation arrangement for data transmission system | |
CA2303459A1 (en) | Transmitter-receiver for use in broadband wireless access communications systems | |
MY120762A (en) | Arrangement and method for radio communication | |
TW338856B (en) | Integrated circuit and transmitter/receiver | |
CA2053890A1 (en) | Time Domain Radio Transmission System | |
AU2001277910A1 (en) | System and apparatus for a direct conversion receiver and transmitter | |
WO2001028150A3 (en) | Method and apparatus for eliminating the effects of frequency offsets in a digital communication system | |
EP1333597A3 (en) | Spread-spectrum changeable base station | |
WO2002035718A3 (en) | Direct conversion radio transceiver |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed | ||
MKLA | Lapsed |
Effective date: 20021030 |