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Class Information
Number: 455/45
Name: Telecommunications > Transmitter and receiver at separate stations > Frequency or phase modulation > Via subcarrier
Description: Subject matter where an intermediate frequency wave is modulated by a modulating signal representative of an intelligence or message and in turn is applied as a modulation signal to a main carrier wave, either alone or in conjunction with other subcarriers.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7593140 |
System and method for generating dynamically modifiable timing control signals |
Sep. 22, 2009 |
| 7587170 |
Digital radio data system receiver methods and apparatus |
Sep. 8, 2009 |
| 7532861 |
Connection interface for conveying RF, data, and power between electronic devices |
May. 12, 2009 |
| 7532681 |
Wireless communication apparatus |
May. 12, 2009 |
| 7526254 |
Digital radio front end with minimized IF signal path |
Apr. 28, 2009 |
| 7433577 |
Method and apparatus for reproducing television broadcast program digest |
Oct. 7, 2008 |
| 7403754 |
Tower discovery and failover |
Jul. 22, 2008 |
| 7376173 |
Unambiguously encoding and decoding signals for wireless channels |
May. 20, 2008 |
| 7353000 |
Receiver monitoring and alert system |
Apr. 1, 2008 |
| 7349691 |
System and apparatus for performing broadcast and localcast communications |
Mar. 25, 2008 |
| 7304939 |
Communication using simultaneous orthogonal signals |
Dec. 4, 2007 |
| 7289765 |
OFDM demodulator |
Oct. 30, 2007 |
| 7263362 |
System and method for deploying multi-function access points in a data network |
Aug. 28, 2007 |
| 7236739 |
Apparatus and method for coordinated music playback in wireless ad-hoc networks |
Jun. 26, 2007 |
| 7224939 |
Audio broadcast receiving apparatus and method |
May. 29, 2007 |
| 7221911 |
Multi-band ultra-wide band communication method and system |
May. 22, 2007 |
| 7215927 |
Radio communication apparatus and radio transmission method |
May. 8, 2007 |
| 7215955 |
Method and system for restoring a subscriber context |
May. 8, 2007 |
| 7194235 |
System, method, and apparatus for facilitating media content channels |
Mar. 20, 2007 |
| 7194288 |
Periodic ranging in a wireless access system for mobile station in sleep mode |
Mar. 20, 2007 |
| 7099626 |
Method and apparatus for gain equalization based on wide-band multi-carrier base station |
Aug. 29, 2006 |
| 7096051 |
Enhancing signals in a two-way radio system |
Aug. 22, 2006 |
| 7088683 |
Communication system and device under OFDM system |
Aug. 8, 2006 |
| 7043214 |
Tower discovery and failover |
May. 9, 2006 |
| 7023897 |
Transmission circuit |
Apr. 4, 2006 |
| 6993290 |
Portable personal radio system and method |
Jan. 31, 2006 |
| 6978026 |
Circuit arrangement for gaining a stereo subcarrier and an RDS carrier |
Dec. 20, 2005 |
| 6957053 |
Method for selection of a receiver tuning frequency |
Oct. 18, 2005 |
| 6934514 |
System for transmitting digital signals with FM signals |
Aug. 23, 2005 |
| 6915109 |
Method of operating a remote control system and a remote control system comprising an RF transmission and receiving system |
Jul. 5, 2005 |
| 6915107 |
Revenue generating method of broadcasting on FM subcarrier |
Jul. 5, 2005 |
| 6901242 |
System and method for mitigating intermittent interruptions in an audio radio broadcast system |
May. 31, 2005 |
| 6847802 |
Transmitter-receiver apparatus with signal coding unit according to RDS standard |
Jan. 25, 2005 |
| 6757517 |
Apparatus and method for coordinated music playback in wireless ad-hoc networks |
Jun. 29, 2004 |
| 6754477 |
RADIO BROADCASTING SERVICE, A TRANSMITTER AND A RECEIVER FOR USE IN SUCH A SYSTEM, A RADIO BROADCASTING METHOD AND A RADIO BROADCASTING SIGNAL, IN WHICH A DATA SIGNAL ACCOMPANYING A PROGRAM SI |
Jun. 22, 2004 |
| 6725013 |
Communication system having frequency reuse in non-blocking manner |
Apr. 20, 2004 |
| 6711390 |
Program related data in an FM RDS receiver |
Mar. 23, 2004 |
| 6697608 |
Digital audio/visual receiver with recordable memory |
Feb. 24, 2004 |
| 6693970 |
QAM modulator |
Feb. 17, 2004 |
| 6647245 |
Subsidiary communication authorization (SCA) radio turner |
Nov. 11, 2003 |
| 6625464 |
Codeable programmable receiver and point to multipoint messaging system |
Sep. 23, 2003 |
| 6587777 |
System and method for location based traffic reporting |
Jul. 1, 2003 |
| 6505050 |
Method and apparatus for suppressing route request messages for wireless gateway applications |
Jan. 7, 2003 |
| 6466776 |
Receiver and method of reception |
Oct. 15, 2002 |
| 6434362 |
Method of receiving messages, and electrical appliance for implementing the method |
Aug. 13, 2002 |
| 6418300 |
Method and device for transmitting mixed analog and digital signals by the same transmitter |
Jul. 9, 2002 |
| 6415135 |
Transmission protocol for file transfer in a DAB system |
Jul. 2, 2002 |
| 6411800 |
Enhanced radio data system |
Jun. 25, 2002 |
| 6397076 |
Method and apparatus for dispatch communications in a broadcast radio system |
May. 28, 2002 |
| 6370391 |
Mobile station and network having hierarchical index for cell broadcast service |
Apr. 9, 2002 |
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