Patent application number | Description | Published |
20090296800 | DTMB-based control system and receiving system having the same - A DTMB-based control system includes a carrier mode detector, a TPS decoder, a first latch, a second latch, and a latch controller. The carrier mode detector receives a number of N | 12-03-2009 |
20090304062 | DTMB-based carrier mode detection system and receiving system having the same - A Digital Terrestrial Multimedia Broadcasting (DTMB)-based carrier mode detection system includes first and second TPS decoders, first and second carrier calculators and a determinator. The first and second TPS decoders respectively receive N | 12-10-2009 |
20100074319 | Decoding system for LDPC code concatenated with 4QAM-NR code - A decoding system for LDPC code concatenated with 4QAM-NR code in a DTMB system is a two-stage decoding system. An NR decoder performs a 4QAM-NR decoding to obtain hard decision information. Then, the so obtained hard decision information together with corresponding soft symbol and channel state information are sent to a log-likelihood ratio (LLR) device for further computing a log-likelihood ratio after an adder adds a correction term associated with the hard decision information to a computed log-likelihood ratio without the hard decision information. An LDPC decoder receives the LLR for decoding. | 03-25-2010 |
20100166092 | TPS decoder for DVB-T television system and receiver using the same - A TPS decoder for a DVB-T digital television system includes an input signal estimator, a masking device, a vector index determinator and a lookup table device. The input signal estimator receives a plurality of frequency-domain input signals and a plurality of channel measure signals to thereby produce a plurality of estimated input signals. The masking device performs a masking operation on the estimated input signals to thereby produce a plurality of masking signals. The vector index determinator is based on the masking signals to determine a vector index corresponding to the frequency-domain input signals. The lookup table device is based on the vector index to produce a codeword. | 07-01-2010 |
20100303140 | SNR estimation system for multi-carrier communication - A signal to noise power ratio estimation system for multi-carrier communication includes a phase rotator, a power estimator, a channel gain calculator, an average and selection device, a combination and calculation device and a decibel (dB) transformation device. The signal to noise power ratio estimation system makes use of a transmit parameter signaling or pilot subcarriers to blindly assist in the signal to noise power ratio estimation to accordingly gain an estimated signal to noise power ratio accurately, and thus a communication system can be calibrated to a preferred condition. | 12-02-2010 |
20110129045 | Method and device for aquiring a channel with frequency offset less than half symbol rate - A method and device for acquiring a channel with a frequency offset less than half symbol rate is applied but not limited to a DVB-S system. A target channel is selected to obtain a carrier frequency and a symbol rate for programming a tuner to obtain a digital baseband signal. A down-sampling factor is calculated based on the symbol rate for performing a down-sampling operation to obtain a down-sampling signal that passes through a digital matched filter to generate a filtered spectrum. A moving average and spectrum inversion is applied to detect location of the target channel and find two cross points thereby estimating a coarse carrier frequency offset for compensating the tuner and a coarse symbol rate. A fine carrier frequency offset and a symbol rate estimate are estimated for compensating and acquiring the target channel when the target channel is successfully detected. | 06-02-2011 |
20110135042 | Blind scan system and method in a DVB-S system - A blind scan system in a DVB-S system includes a spectrum parameter extractor to fetch and calculate a coarse carrier frequency offset and coarse symbol rate of a signal; a digital mixer to depend on the coarse frequency offset to shift the center of a spectrum of the signal to a position where a DC part of a working spectrum of a digital matched filter locates, so as to produce an offset signal; and an interpolator to perform a down-sampling on the offset signal according to the coarse symbol rate in order to improve the in-band signal-to-noise ratio of the digital matched filter and mitigate impacts due to adjacent channel interferences. Thus, the fine carrier frequency offset and fine symbol rate estimation can be performed accurately. | 06-09-2011 |
20120076247 | SISO decoder for a block code - A soft-in-soft-out (SISO) decoder for a general block code includes a source bit generator which generates k guessed source bits; a channel encoder which maps the k guessed source bits to an n-bit channel codeword; a QAM symbol mapper which generates a locally generated symbol sequence comprising m consecutive QAM symbols based on the n-bit channel codeword; a correlator which receives a symbol sequence, a channel state information sequence, and the locally generated symbol sequence to calculate a correlation associated with the received symbol sequence based on the received symbol sequence, the channel state information sequence, and the locally generated symbol sequence; and a log-likelihood ratio calculator which is connected to the source bit generator and the correlator to thereby calculate the required log-likelihood ratios associated with all coded bits corresponding to the received symbol sequence. | 03-29-2012 |
Patent application number | Description | Published |
20090041941 | Method for forming a metal pattern on a substrate - A method for forming a metal pattern on a substrate via printing and electroless plating is disclosed, which includes printing a pattern on the substrate with an ink composition, drying the printed pattern, and contacting the dried pattern with an electroless plating solution. The ink composition either contains components (i), (ii) and (iii), components (i) and (iv), or components (i) and (v), which are dissolved or dispersed in a solvent, wherein (i) is a binder; (ii) is a sulfate terminated polymer of an ethylenically unsaturated monomer; (iii) is a catalytic metal precursor; (iv) is a polymer of an ethylenically unsaturated monomer deposited with particles of catalytic metal; and (v) is a copolymer of an ethylenically unsaturated monomer and a hydrophilic monomer deposited with particles of catalytic metal. The binder (i) is a water swellable resin. The catalytic metal may be Au, Ag, Pd, Pt or Ru. | 02-12-2009 |
20100015338 | PROCESS FOR PREPARING A METAL STYRENE POLYMER COMPOSITE HAVING NANO METALLIC PARTICLES DEPOSITED THEREON - A process for preparing a metal styrene polymer composite having nano metallic particles deposited thereon is disclosed, which includes a) undergoing free radical polymerization of styrene and an optional co-monomer in the presence of a persulfate initiator and a chain transfer agent; and b) contacting the resulting styrene oligomer or copolymer of styrene and the co-monomer from step a) with an aqueous solution containing a noble metal ion dissolved therein, so that the noble metal ion is reduced to element form particles and deposit on the styrene oligomer or copolymer of styrene and the co-monomer by sulfates on the oligomer or copolymer in the absence of a reducing agent. | 01-21-2010 |
20100075026 | Metallization on a surface and in through-holes of a substrate and a catalyst used therein - A copolymer deposited with particles of catalytic metal is disclosed in the present invention, which is formed from an ethylenically unsaturated monomer and a hydrophilic monomer, and the catalytic metal is Au, Ag, Pd, Pt or Ru. The copolymer is hydrophilic when the temperature is lower than a specific temperature, and will become hydrophobic when the temperature is greater than the specific temperature. The present invention also discloses a method for forming a metal layer on a substrate via electroless plating, which includes contacting the substrate with an ink composition, drying the ink composition on the substrate, and contacting the dried ink composition with an electroless plating solution, wherein the ink composition contains the copolymer of the present invention in an aqueous phase. The present invention further discloses a method for forming metal conductors in through holes of a substrate. | 03-25-2010 |