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7623586 |
Frequency and phase control apparatus and maximum likelihood decoder
A frequency and phase control apparatus includes an analog/digital conversion section for converting a reproduction signal into a multiple bit digital signal based on a clock signal; a maximum...
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7623585 |
Systems and modules for use with trellis-based decoding
Systems and modules for use in trellis-based decoding of convolutionally encoded sets of data bits. A first calculation module receives an encoded set of data bits and calculates a signal distance...
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7620879 |
Method of detecting occurrence of error event in data and apparatus for the same
A method of detecting an occurrence of an error event in data and an apparatus for the same are provided. The method includes: preparing an error detection code wherein syndrome sequences for...
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7620102 |
Digital broadcasting transmission and reception system
A digital broadcasting transmission and reception system includes a digital broadcasting transmission apparatus and a digital broadcasting reception apparatus. The digital broadcasting transmission...
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7617440 |
Viterbi traceback initial state index initialization for partial cascade processing
This invention provides the correct Viterbi decode traceback starting index is obtained for all constraint lengths and frame sizes. Reverse transpose operations that depend on the last active...
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7616701 |
Zero excess bandwidth modulation
ZEB (zero excess bandwidth) modulation. The modulation rate of a signal is increased to the entirety of a communication channel's available bandwidth. Spectral zeroes at the edges of the available...
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7616697 |
Cooperative inter-carrier channel coding apparatus, systems, and methods
Embodiments of a codation module associated with a global system for mobile communications (GSM) enhanced data rates for GSM evolution (EDGE) radio access network (GERAN) transceiver are described...
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7613246 |
VSB transmission system
A vestigial sideband (VSB) modulation transmission system and a method for encoding an input signal in the system are disclosed. According to the present invention, the VSB transmission system...
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7609777 |
Maximum likelihood a posteriori probability detector
A communication device comprising an ML-APP detector coupled to at least two antennas. The ML-APP detector comprises at least one Hx unit coupled to at least one LLR unit. The Hx unit generates a...
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7605727 |
Method, medium and apparatus for quantization encoding and de-quantization decoding using trellis
Provided are a method and apparatus for quantization encoding and de-quantization decoding using a trellis. Unlike a trellis coded quantization (TCQ) index, by classifying quantization levels to...
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7602696 |
Adaptive guard intervals in OFDM systems
Dynamic guard interval adaptation is provided for devices having differing delay spreads in an OFDM communication system to reduce the guard intervals, with adaptation controlled by either the...
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7599442 |
Transmitter synchronization in a distributed transmission system
Systems and methods are provided for synchronizing a plurality of transmitters in a distributed transmission system. A data source generates a digital signal. A central data processing component...
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7599419 |
Method and apparatus for use of space time trellis codes based on channel phase feedback
A method for multiple-input-multiple-output (MIMO) wireless communication comprises the steps of generating inner and outer codes based on channel state information available at a transmitter and...
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7594162 |
Viterbi pretraceback for partial cascade processing
This invention modifies Viterbi decoding to improve BER. Within the state metric unit cascade block, this invention forces the unused ACS units decision bits to a 0 for the top rail and a 1 for the...
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7593474 |
Digital broadcast transmitting/receiving system having an improved receiving performance and signal processing method thereof
A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer...
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7593358 |
Transmission device for remote control systems
Transmitter device including a modulator apparatus for the generation of a modulated digital signal in a remote control system. The modulated signal is defined by at least one characteristic...
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7590187 |
Digital broadcasting transmission and/or reception system to improve receiving performance and signal processing method thereof
A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a...
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7587004 |
Method for decoding data using windows of data
The present invention relates to a method for decoding data, said method using windows (WID) of input data. The invention is characterized in that it comprises for a current window the steps...
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7586931 |
Wireless terminal turbo decoding module supporting packet splitting and decoding
A baseband processing module of a wireless terminal includes a Turbo decoding module. The Turbo decoding module decodes a Turbo code word to produce one or more Media Access Control (MAC) packet(s)...
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7577208 |
VSB transmission system
A vestigial sideband (VSB) modulation transmission system and, a method for encoding an input signal in the system are disclosed. According to the present invention, the VSB transmission system...
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7571369 |
Turbo decoder architecture for use in software-defined radio systems
A reconfigurable turbo decoder comprising N processing units. Each of the N processing units receives soft input data samples and decodes the received soft input data samples. The N processing...
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7570720 |
FEC scheme for encoding two bit-streams
An encoding system is configured to allow data to be transmitted at one of two selectable bit-error-rate quality factors. The first bit-error-rate quality factor selection corresponds to the...
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7564930 |
Method and apparatus for implementing a traceback processor for trellis decoding in a Viterbi decoder
A Viterbi decoder includes a state metrics processor that generates survivor information. The Viterbi decoder includes a traceback processor having a traceback engine that tracks a state of a...
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7564916 |
Method for encoding a message using diagonally weighted space-time trellis code depending on bit feedback
Disclosed is a method for encoding messages with space-time trellis codes(STTC) and transmitting the encoded messages in communication system provided with at least two transmit antennas and at...
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7564905 |
System and method for providing terrestrial digital broadcasting service using single frequency network
Provided is a system and method for terrestrial digital broadcasting service using a single frequency network without additional equipment. The system and method synchronizes input signals into...
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7558329 |
Systems and methods for implementing receiver transparent Q-mode
In a receiver transparent Q-mode, i.e., a Q-mode that is only implemented by a transmitter, the receiver is unaware of the Q-mode state of the transmitter. In this type of Q-mode configuration, the...
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7555052 |
Method and system for a turbo trellis coded modulation scheme for communication systems
Method and System for evaluating a turbo-coding scheme suitable for VDSL2 systems. The scheme is a Turbo-Trellis Coded Modulation TTCM that makes use of a Parallel Concatenated Convolutional Code...
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7554953 |
Radio communication system
A radio communication system comprises a communication channel for the transmission of data from a secondary station to a primary station. The secondary station is operable in a first (normal) and...
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7551695 |
Verification of the antenna weights of the base station in a UMTS mobile radio receiver by use of the Viterbi algorithm with fed-back transmission diversity
A mobile station sends to the base stations a bit vector which contains weighting factors (w 1 , w 2 ) for the amplitudes and/or the phases of the signals to be emitted from the antennas. The bit...
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RE40779 |
Communication system
At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and...
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7539258 |
Audio data sync format detecting circuit
The present invention provides an audio data sync format detecting circuit that can minimize both the hardware configuration software processing, and furthermore, has a large flexibility with...
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7539257 |
Continuous phase modulation system and method with added phase pulse
A signal generator generates a coded or memory waveform having a trellis structure. A modulator is operative with the signal generator for adding at least one phase pulse to the trellis structure...
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7539256 |
Decoding device and decoding method
A decoding apparatus that is capable of calculating of the likelihood information at high speed while suppressing increases in processing amount and in circuit scale. In this apparatus, in...
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7532677 |
Apparatus, systems and methods for producing coherent symbols in a single frequency network
A system, method, apparatus and computer code are provided for producing coherent symbols from digital RF transmitters. A receiver receives a first initialization packet containing a plurality of...
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7532676 |
Single sideband and quadrature multiplexed continuous phase modulation
A class of bandwidth reduction techniques are used develop a broad class of modulation types collectively called SSB-FM. These signals can be used to construct communication systems that provide...
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7532672 |
Codecs providing multiple bit streams
According to an aspect of the present invention two streams data encoding corresponding information contained in a multimedia signal are generated with one bitstream (“first stream”) providing...
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7532638 |
Wireless terminal baseband processor high speed turbo decoding module supporting MAC header splitting
A baseband processing module for use within a Radio Frequency (RF) transceiver includes a downlink/uplink interface, TX processing components, a processor, memory, RX processing components, and a...
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7530010 |
Hybrid trace back apparatus and high-speed viterbi decoding system using the same
A hybrid trace back apparatus and a high-speed Viterbi decoding system having the same are disclosed. The hybrid trace back apparatus includes: a register exchanging unit for receiving survivor...
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7529312 |
Layered modulation for terrestrial ATSC applications
Systems and methods are disclosed for applying layered modulation to an 8-VSB signal as used in the Advanced Television Systems Committee (ATSC) digital television signal. A system for transmitting...
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7526047 |
Method for encoding a message into geometrically uniform space-time trellis codes
A method for coding messages by group codes over label alphabet and H-symmetric labeling is provided in order to encode geometrically uniform space-time trellis codes considering a distance...
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7522678 |
Method and apparatus for a data-dependent noise predictive viterbi
An improved Viterbi detector is disclosed in which each branch metric is calculated based on noise statistics that depend on the signal hypothesis corresponding to the branch. Also disclosed is a...
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7515642 |
LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and associated labeling
LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and its associated labeling. A novel means is introduced by which a constellation may be arranged and...
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7515601 |
Turbo decoding module supporting state n metric value normalization operations
A baseband processing module for use within a Radio Frequency (RF) transceiver includes a downlink/uplink interface, TX processing components, a processor, memory, RX processing components, and a...
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7512198 |
Efficient diversity combining for wideband downlink
A communication system employing site diversity combing to increase link availability includes at least two receivers at receive sites within a single downlink beam separated by enough distance to...
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7512189 |
Lower complexity layered modulation signal processor
A method and apparatus for transmitting and receiving a coded signal having an upper layer signal and a lower layer signal is disclosed. The method comprises the steps of combining the upper layer...
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7505522 |
Spectral shaping in multiband OFDM transmitter with clipping
A method of shaping an orthogonal frequency division multiplexing (OFDM) signal spectrum is disclosed. The method comprises receiving an input signal that has a frequency spectrum that includes a...
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7502418 |
Method and apparatus for joint equalization and decoding of multilevel codes
A method and apparatus are disclosed for joint equalization and decoding of multilevel codes, such as the MLT-3 code, which are transmitted over dispersive channels. The MLT-3 code is treated as a...
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7499498 |
Hybrid memory architecture for reduced state sequence estimation (RSSE) techniques
A method and apparatus are disclosed for improving the processing time of reduced complexity sequence estimation techniques, such as reduced state sequence estimation (RSSE). The possible values...
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7492291 |
Methods and apparatus for interfacing a plurality of encoded serial data streams to a serializer/deserializer circuit
Methods and apparatus are provided for interfacing a plurality of encoded serial data streams, such as Serial Gigabit Media Independent Interface streams, to a serializer/deserializer circuit. A...
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7489755 |
Method and apparatus for transmission and reception of data
Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator ( 110 )...
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