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Class Information
Number: 370/206
Name: Multiplex communications > Generalized orthogonal or special mathematical techniques > Quadrature carriers
Description: Subject matter wherein two carrier frequencies are 90 degrees in phase (i.e., quadrature or orthogonal in phase), e.g., sin2 wt and cos2 wt.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7602852 |
Initial parameter estimation in OFDM systems |
Oct. 13, 2009 |
| 7599332 |
Modified preamble structure for IEEE 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, MIMO or otherwise extended devices |
Oct. 6, 2009 |
| 7596105 |
User equipment for synchronizing to a TDD base station |
Sep. 29, 2009 |
| 7596801 |
Single wire return device in a fiber to the home system |
Sep. 29, 2009 |
| 7590202 |
Reduced-complexity antenna system using multiplexed receive chain processing |
Sep. 15, 2009 |
| 7583738 |
Apparatus and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing communication system |
Sep. 1, 2009 |
| 7583584 |
System and method for time diversity |
Sep. 1, 2009 |
| 7580484 |
Orthogonal frequency division multiplexing (OFDM) demodulator, integrated circuit for OFDM demodulation and OFDM demodulation method |
Aug. 25, 2009 |
| 7580487 |
Apparatus and method for estimating a carrier to interference and noise ratio in a communication system |
Aug. 25, 2009 |
| 7577085 |
Multicarrier transmit diversity |
Aug. 18, 2009 |
| 7577087 |
Faster fine timing operation in multi-carrier system |
Aug. 18, 2009 |
| 7577216 |
Guard interval and FFT mode detector in DVB-T receiver |
Aug. 18, 2009 |
| 7573860 |
Method, device and system for determining a transmission power for ARQ related re-transmissions |
Aug. 11, 2009 |
| 7570578 |
Orthogonal frequency division demodulator, method and computer program product |
Aug. 4, 2009 |
| 7570748 |
Control and monitoring telecommunication system and method of setting a modulation method |
Aug. 4, 2009 |
| 7564908 |
Method and apparatus for encryption of over-the-air communications in a wireless communication system |
Jul. 21, 2009 |
| 7561626 |
Method and system for channel estimation in a data transmission system |
Jul. 14, 2009 |
| 7551545 |
Subband-based demodulation for an OFDM-based communication system |
Jun. 23, 2009 |
| 7545731 |
Virtual buffer size management system for the transmission of blocks of data bits in an HS-DSCH downlink channel of a mobile communications network |
Jun. 9, 2009 |
| 7545732 |
Apparatus and method for assigning sub-carriers in an orthogonal frequency division multiplex system |
Jun. 9, 2009 |
| 7542408 |
Method of reducing inter-subcarrier interference in multicarrier communication systems and receiver using it |
Jun. 2, 2009 |
| 7542409 |
Logical and operation diversity combining method |
Jun. 2, 2009 |
| 7539122 |
Device and method for management of the transmission of blocks of data in an HS-DSCH downlink channel of a mobile communications network |
May. 26, 2009 |
| 7535822 |
Synchronization of remote units for a communication network |
May. 19, 2009 |
| 7505396 |
Method and apparatus for establishing interleaver synchronization in an orthogonal frequency division multiplexing (OFDM) communication system |
Mar. 17, 2009 |
| 7499392 |
OFDM equalizer filter with shared multiplier |
Mar. 3, 2009 |
| 7496335 |
Mobile terminal apparatus and channel compensation method of the same |
Feb. 24, 2009 |
| 7489621 |
Adaptive puncturing technique for multicarrier systems |
Feb. 10, 2009 |
| 7489731 |
Communication system using OFDM |
Feb. 10, 2009 |
| 7486738 |
Apparatus and method for reducing the crest factor of single carrier or multi-carrier signals |
Feb. 3, 2009 |
| 7486735 |
Sub-carrier allocation for OFDM |
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 |
| 7474611 |
Reduced complexity channel estimation in OFDM systems |
Jan. 6, 2009 |
| 7460465 |
Method for reducing signaling overhead in a multicarrier system with dynamic bit allocation and corresponding transmitter/receiver device |
Dec. 2, 2008 |
| 7450542 |
Method for frequency division duplex communications |
Nov. 11, 2008 |
| 7433298 |
Compensation for residual frequency offset, phase noise and I/Q imbalance in OFDM modulated communications |
Oct. 7, 2008 |
| 7433382 |
Spread spectrum based multichannel modulation for ultra wideband communications |
Oct. 7, 2008 |
| 7426246 |
Dual layer signal processing in a layered modulation digital signal system |
Sep. 16, 2008 |
| 7426177 |
Round trip delay adjustment in multipoint-to-point communication using orthogonal frequency division multiplexing |
Sep. 16, 2008 |
| 7426243 |
Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers |
Sep. 16, 2008 |
| 7426176 |
Method of power allocation and rate control in OFDMA systems |
Sep. 16, 2008 |
| 7423958 |
Transmitter for transmitting signals over radio channels and method for transmitting signals over radio channels |
Sep. 9, 2008 |
| 7424073 |
Orthogonal frequency division multiplexing (OFDM) receiver, OFDM receiving circuit and OFDM diversity reception method |
Sep. 9, 2008 |
| 7418049 |
Method and apparatus for decoding baseband orthogonal frequency division multiplex signals |
Aug. 26, 2008 |
| 7414962 |
OFDM diversity transmission |
Aug. 19, 2008 |
| 7414963 |
Dynamic zero suffix addition |
Aug. 19, 2008 |
| 7408872 |
Modulation of signals for transmission in packets via an air interface |
Aug. 5, 2008 |
| 7408997 |
Modulation/demodulation apparatus using matrix and anti-matrix |
Aug. 5, 2008 |
| 7391711 |
Method and system for adaptive modulation |
Jun. 24, 2008 |
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