| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | The method and apparatus of the trellis coding | JP26408992 | 1992-09-08 | JP2654321B2 | 1997-09-17 | RII FUAN UEI |
| 122 | Method and device for signal reception affected by inter-symbol interference | JP5362996 | 1996-02-19 | JPH08256184A | 1996-10-01 | BUARUTAA BENEDEITSUTO |
| PROBLEM TO BE SOLVED: To provide a method for receiving a signal affected by inter-sumbol interference, especially a signal which is encoded and modulated by a TCM system. SOLUTION: A receiver containing two viterbi decoders 1 and 2 which are cascade-connected is used for receiving a TCM modulation signal. The first decoder 1 operates in accordance with software output viterbi algorithm SOVA and the output contains rigid decision on a reliable degree paraffieter and a transmission symbol. The output of the first decoder 1 which substantially considers the storage effect of a channel is generally sent to the second viterbi decoder 2 executing actual decision after the operation of an inverse interleaving operation by comparing the influence of inter-symbol interference. The method and the device are suitable for a digital communication system such as a micro wave radio link. | ||||||
| 123 | Method and equipment for improving reliability of data storage device | JP4937995 | 1995-03-09 | JPH07312036A | 1995-11-28 | RISA FUREDERITSUKUSON |
| PURPOSE: To improve the reliability of a transmitter while using a binary data as a code word on a partial-response-channel by employing a trellis code, in which a minimum distance between the output sequence of the partial-response- channel having a limit output is increased. CONSTITUTION: A binary symbol string type input data is transmitted to a decoder 11 from a bus 10, and the decoder 11 generates a binary symbol sequence having an algebraic limitation, and inputs it to a partial-response- channel 12 having a system polynomial displaying a channel memory. The output sequence of the channel 12 is contaminated by noises, and detected by a change Viterbi detector 13. The detector 13 computes and predicts a most- possible coded sequence from the channel output sequence. A decoder 14 recovers an original input data by the prediction, and outputs it to a bus 15. The time of a trellis is changed so that all output sequences satisfying no algebraic limitation specified to a tracked algebraic attribute value is eliminated from the trellis at the tail of a word code. COPYRIGHT: (C)1995,JPO | ||||||
| 124 | Signal point mapping method and signal point detection method | JP3432894 | 1994-03-04 | JPH07245635A | 1995-09-19 | IKEDA TAMOTSU |
| PURPOSE:To quickly and surely detect bits of a signal point corresponding to a parallel path toward the MSB even when a phase of a carrier is rotated. CONSTITUTION:The arrangement of 16-sets of signal points is classified into subsets 0-7, in which each consists of two signal points arranged shown in figure. The subsets 0, 1 are formed to be in point symmetry so that the two signal points of the subset 0 rotated by 90' correspond to two signal points of the subset 1. Furthermore, bits toward the MSB of signal points corresponding to each subset corresponding to a parallel path are made coincident with each other. Signal points are mapped similarly in the subsets 1-3 and also in the subsets 4-7. | ||||||
| 125 | Transmission system using block coded or trellis coded modulation, receiver and decoder for such a system | JP18166394 | 1994-08-02 | JPH07177193A | 1995-07-14 | MORIDI SAIED; MARTINEZ GEORGES |
| PURPOSE: To provide a simple means for calculating the length of branch with irreducibly minimum bits without approximation, to attain the memoryless configuration of viterbi decoder and to provide a receiver and a decoder for a transmission system. CONSTITUTION: The decoder designed so as to be used for the receiver in the transmission system is composed of a module for calculating a distance between each reception point and the closest point in each subset of two-dimensional arrangement under using in addition to the other elements. A distance μ to be used is a relative distance applied by an equality. In this equality, an index (i) shows a lateral axis i=x or longitudinal axis i=y of quantity indicating this index, |Δi | expresses the size of gap between two points in the arrangement, Ei is the error of received point away from the closest point in the two-dimensional arrangement, and sgn shows a code function. | ||||||
| 126 | Method and device for transmitting plural signals | JP15429694 | 1994-06-14 | JPH0758795A | 1995-03-03 | UIRIAMU RUISU BETSUTSU; GOODON BUREMAA; RUUKU JIEI SUMISUUITSUKU; EDOWAADO SAIMON ZURANSUKI |
| PURPOSE: To provide a system for transmitting data signals and voice signals which can widen the dynamic range of the voice signals even when an error is deliberately introduced to the transmission of the data signals. CONSTITUTION: In a communication system, the signal space of a signal point array is divided into a plurality of regions by using an error correcting technique, such as the channel encoding, etc., and at least one region overlaps with another region. Data signals on a line 501 are channel-encoded and selects a specific one of the regions and the region is represented by a reference signal point value. Sound signals on a line 549 are encoded and form a signal point vector and the vector is added to a reference signal point to obtain a signal. The obtained signal is rotated in the overlapping area so as to deliberately introduce an error to a transmitted signal point system. Regardless of the deliberately introduced signal point, a receiver reproduces the original selected reference point value through the channel-encoding of the data signals and simulates the voice signals by using the reference point value. | ||||||
| 127 | JPH06507766A - | JP50009393 | 1992-05-08 | JPH06507766A | 1994-09-01 | |
| An error detection and correction method and apparatus is described which permits the correction of double errors using a (15,11) Hamming code and a parity bit. The Hamming code and parity bit allows the detection of double errors. A modulated waveform carrying the binary data is examined for anomalies such as noise pulses. A hint signal is generated based on the anomalies which points to a suspect bit. The state of this bit is changed to correct for double errors. | ||||||
| 128 | Viterbi decoder | JP13375892 | 1992-05-26 | JPH05327526A | 1993-12-10 | TODOROKI TOSHIYA |
| PURPOSE: To simplify a circuit constitution while the number of shift registers or a means which searches a non-coding bit are not changed at the time of multivaluing input data by searching a coding bit with the decision of the non- coding bit to be searched at a final stage. CONSTITUTION: When encoded and modulated multivalued soft judgement data are inputted from an Ich and a Qch, a first inverse mapping circuit 3 searches partial set central signal points A-D, and searches a bit corresponding to it. At the same time, shift registers 8 and 9 hold the above mentioned multivalued soft judgement data in a fixed time. One of decoded data from a path memory 6 are outputted from an output terminal, and the other are re-encoded by a re-encoder 7, and inputted to a second inverse mapping circuit 10. The circuit 10 searches the non-coding bit corresponding to the partial set indicated by the re-encoded data from the multivalued soft judgement data held by the circuits 8 and 9. The output of the path memory 6 and the output data of the circuit 10 are outputted from the output terminal. COPYRIGHT: (C)1993,JPO&Japio | ||||||
| 129 | JPH05506761A - | JP50637692 | 1992-02-11 | JPH05506761A | 1993-09-30 | |
| 130 | Multi-stage decoder | JP7478292 | 1992-03-30 | JPH05114923A | 1993-05-07 | KAARU FUEIZERU; ANTOWAANU CHIYURII |
| PURPOSE: To reduce the S/N at an emission terminal and to decrease the emission power with respect to a prescribed error rate of binary data. CONSTITUTION: Symbols subject to multi-level coding from a received constellation diagram into some partial sets at some consecutive division levels are decoded. The symbols of the constellation diagram are coded into some bits, stages 621 , 622 , 623 of the multi-stage decoder decide a series of bits with respect to division levels for a series of estimate symbols and the estimate symbols are selected from the constellation diagram or the symbols of the partial sets as closest individually to the received symbols. Decision means 631 , 632 , 633 generate a delete bit to the estimate symbol from at least one of the stages 621 , 622 , 623 when it is within a prescribed delete zone. | ||||||
| 131 | Signal transmission device | JP106092 | 1992-01-07 | JPH0548546A | 1993-02-26 | MOULSLEY TIMOTHY JAMES |
| PURPOSE: To provide a signal transmission device which easily encodes an analog signal. CONSTITUTION: An analog signal source 10 is connected to an analysis means 12 so that plural parameters are supplied to a bus 14. The analysis means generates reset signals in a different line 23 and they are supplied to a tree encoder 22. The reset signals are applied to the tree encoder before the parameters are applied to the bus 14 so that it starts from the known position of the respective parameter encoding trees. An encoding signal is supplied to a modulator 28 having output connected to a transmitter 30 by a bus 24. A reproduction device estimates the partial value of the parameter by using a probability that the analog signal becomes a signal which is to be reproduced with respective possible encoding sequences. The probability is obtained from the probability density function of the parameter. The tree encoder is arbitrarily arranged so that eight PSK or sixteen QAM modulation trellis encoding is generated. | ||||||
| 132 | Information encoding device | JP13709285 | 1985-06-25 | JPS6113821A | 1986-01-22 | AASAA ROBAATO KARUDAABANKU; NEIRU JIEEMUSU AREKISANDAA SUR |
| 133 | PROCESSING AND ERROR CONCEALMENT OF DIGITAL SIGNALS | US16108303 | 2018-08-22 | US20180359049A1 | 2018-12-13 | Seppo NIKKILA; Tom LINDEMAN |
| A method for forward error concealment encoding of a digital signal data stream including a sequence of individual digital samples, includes encoding one or more of the individual digital samples according to an encoding mode selected from a number of predetermined encoding modes in accordance with a value of the respective digital sample, wherein encoding includes determining an encoded digital sample as a combination of bits of the respective digital sample and a predetermined number of forward error concealment bits arranged into predetermined bit positions of the encoded digital sample in accordance with the selected encoding mode. A method for forward error concealment decoding of a digital signal data stream including a sequence of encoded individual digital samples is provided, and includes decoding one or more of the individual encoded samples into respective decoded digital samples according to a decoding mode selected from a number of predetermined decoding. | ||||||
| 134 | CODING AND MODULATION APPARATUS USING NON-UNIFORM CONSTELLATION | US15899501 | 2018-02-20 | US20180254939A1 | 2018-09-06 | Lothar STADELMEIER; Nabil Sven Loghin; Jan Zoellner |
| A coding and modulation apparatus and method are presented. The apparatus (10) comprises an encoder (11) that encodes input data into cell words, and a modulator (12) that modulates said cell words into constellation values of a non-uniform constellation. The modulator (12) is configured to use, based on the total number M of constellation points of the constellation and the signal-to-noise ratio SNR in dB, a non-uniform constellation from a group of constellations comprising one or more of predetermined constellations defined by the constellation position vector w0 . . . b−1, wherein b=M/4. | ||||||
| 135 | RECEIVER, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD | US15561806 | 2016-02-19 | US20180131393A1 | 2018-05-10 | Keisuke YAMAMOTO; Takashi YANO |
| A wireless communication technique in which information that has been encoded and interleaved (the sequence of bits has been rearranged) on the transmission side is subjected to iterative decoding processing by using a demodulator, a deinterleaver, a decoder, and an interleaver on the receiving side. | ||||||
| 136 | ERASURE CODING AND REPLICATION IN STORAGE CLUSTERS | US15685833 | 2017-08-24 | US20170351575A1 | 2017-12-07 | Don BAKER; Paul R.M. CARPENTIER; Andrew KLAGER; Aaron PIERCE; Jonathan RING; Russell TURPIN; David YOAKLEY |
| A cluster receives a request to store an object using replication or erasure coding. The cluster writes the object using erasure coding. A manifest is written that includes an indication of erasure coding and a unique identifier for each segment. The cluster returns a unique identifier of the manifest. The cluster receives a request from a client that includes a unique identifier. The cluster determines whether the object has been stored using replication or erasure coding. If using erasure coding, the method reads a manifest. The method identifies segments within the cluster using unique segment identifiers of the manifest. Using these unique segment identifiers, the method reconstructs the object. A persistent storage area of another disk is scanned to find a unique identifier of a failed disk. If using erasure coding, a missing segment previously stored on the disk is identified. The method locates other segments. Missing segments are regenerated. | ||||||
| 137 | FEC Decoding Apparatus and Method | US15661818 | 2017-07-27 | US20170324512A1 | 2017-11-09 | Zhiyu Xiao; Mo Li |
| A decoding apparatus and method. When all the code words in the to-be-decoded group meet that a checksum is 0, forward error correction (FEC) decoding is not performed, and only the sign bit decision is performed. That is, in a process of performing multiple times of decoding on each code word, FEC decoding is not always performed every time. This reduces power consumption required by FEC decoding. | ||||||
| 138 | Optimized code table signaling for authentication to a network and information system | US14863075 | 2015-09-23 | US09774349B2 | 2017-09-26 | Bruce Conway |
| In various embodiments, a system comprising a network interface, a processor, and a non-transient memory medium operatively coupled to the processor is disclosed. The memory medium is configured to store a plurality of instructions configured to program the processor to receive a digital bit stream, transform the digital bit stream to an encoded digital bit stream. The encoded digital bit stream comprises at least one of a gateway channel, a composite channel, or a data channel, and any combination thereof, and provides the encoded digital bit stream to the network interface for transmission. A non-transitory computer-readable memory medium and a computer-implemented method also are disclosed. | ||||||
| 139 | Coding and modulation apparatus using non-uniform constellation | US14786371 | 2014-04-29 | US09680684B2 | 2017-06-13 | Lothar Stadelmeier; Nabil Sven Loghin; Jan Zoellner |
| A coding and modulation apparatus and method are presented. The apparatus (10) comprises an encoder (11) that encodes input data into cell words, and a modulator (12) that modulates said cell words into constellation values of a non-uniform constellation. The modulator (12) is configured to use, based on the total number M of constellation points of the constellation and the signal-to-noise ratio SNR in dB, a non-uniform constellation from a group of constellations comprising one or more constellations defined by a constellation position vector comprising a predetermined number of constellation positions, wherein in one or more constellation position vectors two or more constellation positions are identical resulting from a condensation of preliminary constellation positions optimized before. | ||||||
| 140 | OPTIMIZED CODE TABLE SIGNALING FOR AUTHENTICATION TO A NETWORK AND INFORMATION SYSTEM | US15262966 | 2016-09-12 | US20160380648A1 | 2016-12-29 | Bruce CONWAY |
| In various embodiments, a system comprising a network interface, a processor, and a non-transient memory medium operatively coupled to the processor is disclosed. The memory medium is configured to store a plurality of instructions configured to program the processor to receive a digital bit stream, transform the digital bit stream to an encoded digital bit stream. The encoded digital bit stream comprises at least one of a gateway channel, a composite channel, or a data channel, and any combination thereof, and provides the encoded digital bit stream to the network interface for transmission. A non-transitory computer-readable memory medium and a computer-implemented method also are disclosed. | ||||||
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