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Browse by Category: Main > Communications
Class Information
Number: 375/264
Name: Pulse or digital communications > Systems using alternating or pulsating current > Plural channels for transmission of a single pulse train > Quadrature amplitude modulation > Multilevel
Description: Subject matter in which the transmitted pulse waveform has more than two discrete amplitude levels.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8693562 Method for receiving two decorrelated signals transmitted on a single channel and receiver for implementing said method Apr. 8, 2014
8675794 Efficient estimation of feedback for modulation and coding scheme (MCS) selection Mar. 18, 2014
8649445 Methods and systems for noise resilient, pin-efficient and low power communications with sparse signaling codes Feb. 11, 2014
8630363 Single-carrier block transmission with trellis coded modulation (TCM), multi-level coded modulation (MLCM) and bit-interleaved MLCM (BIMLCM) Jan. 14, 2014
8619899 Information processing apparatus and signal determination method Dec. 31, 2013
8619895 Apparatus and method for transmitting/receiving broadcast data in digital broadcasting system Dec. 31, 2013
8615033 Data transmission rate adaptation in a wireless communication system Dec. 24, 2013
8594219 Transposed structure for cyclic delay diversity (CDD) based precoding Nov. 26, 2013
8559552 Dual carrier modulation precoding Oct. 15, 2013
8552900 System and method of clocking low sample rate analog to digital converters while minimizing linearity errors Oct. 8, 2013
8553653 Arrangement and method for channel mapping in a wireless communication system Oct. 8, 2013
8548105 Joint time-frequency automatic gain control for wireless communication Oct. 1, 2013
8520748 Transmitter, OFDM communication system, and transmission method Aug. 27, 2013
8520768 Sequence generating method for efficient detection and method for transmitting and receiving signals using the same Aug. 27, 2013
8498355 Device and method for correcting a data error in communication path Jul. 30, 2013
8494071 Device and method for correcting a data error in communication path Jul. 23, 2013
8488693 Wireless communication systems and methods using reference signals Jul. 16, 2013
8472535 Multi-carrier transmitter back-off estimation Jun. 25, 2013
8467439 Adaptively switching equalization operations in a node of a wireless network Jun. 18, 2013
8462891 Error detection and offset cancellation during multi-wire communication Jun. 11, 2013
8458752 Method for receiving broadcasting signal and broadcasting receiver Jun. 4, 2013
8446992 Digital exciter having pilot signal compensation May. 21, 2013
8446972 Communication system, reception device, and communication method May. 21, 2013
8442163 List-viterbi hard iterative decoder for multilevel codes May. 14, 2013
8428161 Symbol vector mapping for chase-combining HARQ Apr. 23, 2013
8428182 Communication method and radio communication apparatus Apr. 23, 2013
8411775 Iterative demapper Apr. 2, 2013
8391407 Data transmission device and method thereof, and data reception device and method thereof Mar. 5, 2013
8385479 Apparatus and method for canceling interference in multi-antenna system Feb. 26, 2013
8363739 Pilot scheme for a MIMO communication system Jan. 29, 2013
8345806 Apparatus and method for detecting signal based on QR-decomposition in multiple input multiple output wireless communication system Jan. 1, 2013
8340202 Method and apparatus for efficient soft modulation for gray-mapped QAM symbols Dec. 25, 2012
8340208 Information processing device and signal processing method Dec. 25, 2012
8325857 Modulation division multiple access Dec. 4, 2012
8319569 Quadrature amplitude modulator and quadrature amplitude modulation method Nov. 27, 2012
8295378 Method and system for minimum mean squared error soft interference cancellation (MMSE-SIC) based suboptimal maximum likelihood (ML) detection for multiple input multiple output (MIMO) wireless Oct. 23, 2012
8295389 Sequence generating method for efficient detection and method for transmitting and receiving signals using the same Oct. 23, 2012
8295398 Data re-transferring method based on bit transformation Oct. 23, 2012
8289952 Enhanced VoIP media flow quality by adapting speech encoding based on selected modulation and coding scheme (MCS) Oct. 16, 2012
8284869 QAM demodulation Oct. 9, 2012
8275057 Methods and systems to estimate channel frequency response in multi-carrier signals Sep. 25, 2012
8270525 Digital radio communications method using multi-level modulation scheme and transmitter and receiver Sep. 18, 2012
8265194 Virtual side channels for digital wireless communication systems Sep. 11, 2012
8259872 Nonlinear post-processors for channels with signal-dependent noise Sep. 4, 2012
8254489 Transmission method and multiple input multiple output wireless communication system using the same Aug. 28, 2012
8244535 Audio frequency remapping Aug. 14, 2012
8239726 Apparatuses and methods for encoding and decoding Aug. 7, 2012
8233781 Image reproduction method and image reproduction apparatus Jul. 31, 2012
8229022 Modulation and demodulation method, modulation apparatus and demodulation apparatus Jul. 24, 2012
8213532 Information processing device and bidirectional transmission method Jul. 3, 2012

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