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Class Information
Number: 370/207
Name: Multiplex communications > Generalized orthogonal or special mathematical techniques > Quadrature carriers > Having a signaling constellation
Description: Subject matter wherein supervisory information is transmitted or received in a symbol pattern different from the symbol pattern carrying the primary information, and wherein the symbol patterns are generated using quadrature modulation technique (e.g., QAM, QPSK, etc.).
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7623570 |
Multi sub-carrier communication system and method providing improved frequency equalization performance |
Nov. 24, 2009 |
| 7613103 |
Apparatus and method for decoding turbo TCM using coset mapping |
Nov. 3, 2009 |
| 7609610 |
Data transmission method, data reception method, transmission device and reception device using the same, and communication system using the same |
Oct. 27, 2009 |
| 7583583 |
System and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing signals using reserved spectrum |
Sep. 1, 2009 |
| 7584498 |
Method and apparatus for enhanced cable modem operation |
Sep. 1, 2009 |
| 7567501 |
Embedded keying |
Jul. 28, 2009 |
| 7535822 |
Synchronization of remote units for a communication network |
May. 19, 2009 |
| 7522514 |
Systems and methods for high rate OFDM communications |
Apr. 21, 2009 |
| 7489621 |
Adaptive puncturing technique for multicarrier systems |
Feb. 10, 2009 |
| 7486608 |
Efficient implementation of low power mode in digital subscriber line (DSL) transceivers |
Feb. 3, 2009 |
| 7483365 |
Process for obtaining notches in the transmission of signals over the electricity network |
Jan. 27, 2009 |
| 7480236 |
Multipoint-to-point communication using orthgonal frequency division multiplexing and identification codes |
Jan. 20, 2009 |
| 7474610 |
OFDM automatic frequency control device and method thereof |
Jan. 6, 2009 |
| 7469414 |
Fast and reliable data carrier detection by a cable modem in a cable television plant |
Dec. 23, 2008 |
| 7463576 |
Channel estimation for OFDM communication systems |
Dec. 9, 2008 |
| 7433297 |
Wireless internet access system and method |
Oct. 7, 2008 |
| 7426177 |
Round trip delay adjustment in multipoint-to-point communication using orthogonal frequency division multiplexing |
Sep. 16, 2008 |
| 7418049 |
Method and apparatus for decoding baseband orthogonal frequency division multiplex signals |
Aug. 26, 2008 |
| 7414958 |
Efficient tone ordering for multitone transmission |
Aug. 19, 2008 |
| 7391712 |
Method and system for forward-looking tone allocation |
Jun. 24, 2008 |
| 7391711 |
Method and system for adaptive modulation |
Jun. 24, 2008 |
| 7386056 |
Method to increase performance of secondary data in a hierarchical modulation scheme |
Jun. 10, 2008 |
| 7376878 |
Compensating for errors received in a signal |
May. 20, 2008 |
| RE40254 |
Method and system for realising a fast control channel in a cellular radio network |
Apr. 22, 2008 |
| 7363007 |
Adaptive modulation/demodulation method and radio communications systems |
Apr. 22, 2008 |
| 7313125 |
OFDM demodulation method and semiconductor integrated circuit device |
Dec. 25, 2007 |
| 7313099 |
Phase system rotation for power estimation |
Dec. 25, 2007 |
| 7292526 |
Mobile communication system, radio control station, base station and mobile station for the system, and parameter determination method employing parallel combinatory spread-spectrum scheme |
Nov. 6, 2007 |
| 7280607 |
Ultra wide bandwidth communications method and system |
Oct. 9, 2007 |
| 7254167 |
Constellation-multiplexed transmitter and receiver |
Aug. 7, 2007 |
| 7230992 |
Method to create hierarchical modulation in OFDM |
Jun. 12, 2007 |
| 7230993 |
Method and apparatus for modulation using an at least four-dimensional signal constellation |
Jun. 12, 2007 |
| 7203248 |
Impairment sensitive selection of constellation points for communication across a channel |
Apr. 10, 2007 |
| 7158473 |
Transmitting/receiving apparatus, method, program, recording medium, and integrated circuit used in communication network |
Jan. 2, 2007 |
| 7099266 |
Orthogonal frequency division multiplexed signal transmitting apparatus, orthogonal frequency division multiplexed signal receiving apparatus, and orthogonal frequency division multiplexed sig |
Aug. 29, 2006 |
| 7058151 |
Apparatus and method for achieving symbol timing and frequency synchronization to orthogonal frequency division multiplexing signal |
Jun. 6, 2006 |
| 7043680 |
Frequency division multiplex transmission signal receiving apparatus using a plurality of carriers |
May. 9, 2006 |
| 7039001 |
Channel estimation for OFDM communication systems |
May. 2, 2006 |
| 7031334 |
Method and system for realising a fast control channel in a cellular radio network |
Apr. 18, 2006 |
| 7016296 |
Adaptive modulation for fixed wireless link in cable transmission system |
Mar. 21, 2006 |
| 7016426 |
Method for determining the amplitude imbalance at the receiving end and quadrature error in a multi-carrier system |
Mar. 21, 2006 |
| 6999406 |
Reception synchronization apparatus and demodulating apparatus using the same |
Feb. 14, 2006 |
| 6999756 |
Apparatus for processing call of wireless LAN using callback function and method thereof |
Feb. 14, 2006 |
| 6925129 |
Method and circuit arrangement for improved data transmission |
Aug. 2, 2005 |
| 6914876 |
Method for dynamic frequency selection |
Jul. 5, 2005 |
| 6798735 |
Adaptive allocation for variable bandwidth multicarrier communication |
Sep. 28, 2004 |
| 6771590 |
Communication system clock synchronization techniques |
Aug. 3, 2004 |
| 6662135 |
Method and apparatus for reflective mixer testing of a cable modem |
Dec. 9, 2003 |
| 6628945 |
Apparatus and methods for high-penetration random access in wireless communications systems |
Sep. 30, 2003 |
| 6625111 |
OFDM communication apparatus |
Sep. 23, 2003 |
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