Patent application number | Description | Published |
20090309657 | Predistortion Apparatus, System, And Method - The present invention discloses a predistortion apparatus, a predistortion system and a predistortion method. The predistorter comprises a modular value calculating section, for performing modular arithmetic on an information source input signal inputted from an information source; an orthogonal lookup table value acquiring section, for searching N stored lookup tables orthogonal to one another, finding out corresponding output of each lookup table in accordance with the modular value of the information source input signal, and acquiring N lookup table values, wherein N is an integer greater than 1; a multiplying section, for multiplying the N lookup table values acquired by the orthogonal lookup table value acquiring section with N amplitude adjustment factors to obtain N amplitude adjustment values, and multiplying the N lookup table values with N phase adjustment factors to obtain N phase adjustment values; and a summating section, for summating the N amplitude adjustment values to obtain an amplitude predistortion value, and summating the N phase adjustment values to obtain a phase predistortion value. | 12-17-2009 |
20100001795 | Baseband Predistortion Device And Method - The present invention discloses a baseband predistorter and baseband predistortion method. The baseband predistorter comprising: an address generator for calculating an address of a phase basic lookup table and an address of an amplitude basic lookup table; a parameter determining unit for determining a phase translational amount, an amplitude translational amount, a phase curvature adjustment amount and an amplitude curvature adjustment amount; a phase translating unit for changing the address in accordance with the phase translational amount; an amplitude translating unit for changing the address in accordance with the amplitude translational amount; a phase basic lookup table searching section for determining a corresponding phase output; an amplitude basic lookup table searching section, for determining a corresponding amplitude output; a phase curvature adjusting section, for adjusting the phase output; and an amplitude curvature adjusting section, for adjusting the amplitude output. | 01-07-2010 |
20100039100 | Nonlinear Degree Measuring Apparatus And Method For A Power Amplifier, Predistortion Compensation Apparatus - This invention relates to a nonlinear degree measuring apparatus and method for a power amplifier, and a predistortion compensation apparatus. The nonlinear degree measuring apparatus comprises a delayer ( | 02-18-2010 |
20100289572 | PREDISTORTER, PREDISTORTION METHOD, AND PREDISTORTION SYSTEM - This invention relates to a predistorter, a predistortion method, and a predistortion system. The predistorter comprises a modulus value determining section, for determining a modulus value of an input signal; a base searching section, for searching a predetermined base lookup table in accordance with the modulus value of the input signal, so as to obtain a base lookup table value; an offset searching section, for searching a predetermined offset lookup table in accordance with the modulus value of the input signal, so as to obtain an offset lookup table value; an interpolation factor generating section, for generating an interpolation factor in accordance with the modulus value of the input signal; a multiplying section, for multiplying the offset lookup table value with the interpolation factor; and a summating section, for adding a product obtained by the multiplying section to the base lookup table value, so as to obtain a predistortion value. | 11-18-2010 |
20110068868 | Amplifier Device and Predistortion Control Method - This invention relates to an amplifier device and a predistortion control method. The amplifier device comprises a predistortion unit, a predistortion control unit, and an amplifier unit, of which the predistortion control unit controls the predistortion unit in accordance with a signal fed back from the amplifier unit. The predistortion control method comprises determining power of a left side lobe of two side lobes of a frequency spectrum of the signal fed back from the amplifier unit; determining power of a right side lobe of two side lobes of a frequency spectrum of the signal fed back from the amplifier unit; determining a cost function in accordance with the power of the first and right side lobes, and controlling the predistortion unit in accordance with the cost function. | 03-24-2011 |
20110187455 | Adaptive Digital Predistortion Device and Method - The present invention relates to an adaptive digital predistortion device and method. The adaptive digital predistortion device comprising: a predistortion unit for predistorting an input signal according to a predistortion parameter stored in a look-up table; a cost function generation unit for generating a cost function; a fixed segment point determination unit for determining a fixed segment point; and an update unit for updating parameters (u | 08-04-2011 |
20120081178 | POWER AMPLIFICATION DEVICE AND METHOD FOR ACQUIRING POWER ADJUSTING COEFFICIENT - An embodiment of the invention discloses a power amplification device and method and a method for acquiring a power adjusting coefficient. The power amplification device according to one embodiment of the invention includes: a power control module configured to perform power adjusting on an input signal; a power amplification module configured to perform power amplification on the signal subjected to the power adjusting by the power control module; and a pre-distortion module configured to compensate for nonlinear characteristic of the power amplification module; wherein, said power control module is coupled between said pre-distortion module and said power amplification module in series; alternatively, said pre-distortion module is coupled between said power control module and said power amplification module in series. With the embodiment of the invention, a transmitter can be provided with a spectrum including a low side lobe even upon startup. | 04-05-2012 |
20120214428 | Predistortion Device, Method for Predistortion, and Transmitter/Receiver System - The embodiments of the present invention provide a predistortion device, method for predistortion and transmitter/receiver system. The predistortion device comprises a predistortion unit, and the predistortion device further comprises: a signal acquiring unit to process the output signals of a transmitting circuit to obtain distorted signals; a signal coupling unit to couple the distorted signals acquired by the signal acquiring unit to the receiving signals inputted to a receiving circuit; and a signal processing unit to decouple the output signals of the receiving circuit to acquire the distorted signals and the receiving signals. With the embodiments of the present invention, an analog receiving circuit may be reused in a half duplexing system and a full duplexing system, and the requirement on the analog receiving circuit is lowered, thereby reducing the cost. | 08-23-2012 |
20150061773 | DIGITAL PREDISTORTION APPARATUS AND METHOD - A digital predistortion apparatus comprising: a nonlinear device; a memory effect compensator; a constant value characteristic acquirer; a cost function generator; and a coefficient updater is described. | 03-05-2015 |
Patent application number | Description | Published |
20090054495 | CCR9 inhibitors and methods of use thereof - The invention relates to compounds represented by Structural Formula I, which can bind to CCR9 receptors and block the binding of a ligand (e.g., TECK) to the receptors. The invention also relates to a method of inhibiting a function of CCR9, and to the use compounds represented by Structural Formula I in research, therapeutic, prophylactic and diagnostic methods. | 02-26-2009 |
20100093802 | CCR9 INHIBITORS AND METHODS OF USE THEREOF - The invention relates to compounds represented by Structural Formula I, which can bind to CCR9 receptors and block the binding of a ligand (e.g., TECK) to the receptors. The invention also relates to a method of inhibiting a function of CCR9, and to the use compounds represented by Structural Formula I in research, therapeutic, prophylactic and diagnostic methods. | 04-15-2010 |
20100160258 | Bicyclic aryl sphingosine 1-phosphate analogs - Compounds that have agonist activity at one or more of the S1P receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at S1P receptors. | 06-24-2010 |
20100160357 | Heterobicyclic sphingosine 1-phosphate analogs - Compounds that have agonist activity at one or more of the S1P receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at S1P receptors. | 06-24-2010 |
20100280074 | CCR9 INHIBITORS AND METHODS OF USE THEREOF - The invention relates to compounds represented by Structural Formula I, which can bind to CCR9 receptors and block the binding of a ligand (e.g., TECK) to the receptors. The invention also relates to a method of inhibiting a function of CCR9, and to the use compounds represented by Structural Formula I in research, therapeutic, prophylactic and diagnostic methods. | 11-04-2010 |
20100324093 | CCR9 INHIBITORS AND METHODS OF USE THEREOF - The invention relates to compounds represented by Structural Formula I, which can bind to CCR9 receptors and block the binding of a ligand (e.g., TECK) to the receptors. The invention also relates to a method of inhibiting a function of CCR9, and to the use compounds represented by Structural Formula I in research, therapeutic, prophylactic and diagnostic methods. | 12-23-2010 |
20110071134 | 2-(AMINO-SUBSTITUTED)-4-ARYL PYRIMIDINES AND RELATED COMPOUNDS USEFUL FOR TREATING INFLAMMATORY DISEASES - A heterocyclic inhibitor having the formula I, with the variables defined herein, which is useful for treating inflammatory and other physiological disorders in which PKC-theta isoform plays a role: | 03-24-2011 |
20110313000 | CCR9 INHIBITORS AND METHODS OF USE THEREOF - The invention relates to compounds represented by Structural Formula I, which can bind to CCR9 receptors and block the binding of a ligand (e.g., TECK) to the receptors. The invention also relates to a method of inhibiting a function of CCR9, and to the use compounds represented by Structural Formula I in research, therapeutic, prophylactic and diagnostic methods. | 12-22-2011 |
20120172345 | HETEROARYLS AND USES THEREOF - This invention provides compounds of formula IA-i-a or IB-i-a and subsets thereof: | 07-05-2012 |
20120178723 | HETEROARYLS AND USES THEREOF - This invention provides compounds of formula IA-a or IB-a and subsets thereof: | 07-12-2012 |
20120214794 | HETEROARYLS AND USES THEREOF - This invention provides compounds of formula I-A or I-B: | 08-23-2012 |
20130059821 | BICYCLIC ARYL SPHINGOSINE 1-PHOSPHATE ANALOGS - Compounds that have agonist activity at one or more of the SIP receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at SIP receptors. | 03-07-2013 |
20130267563 | HETEROARYLS AND USES THEREOF - This invention provides compounds of formula IA or IB: wherein HY, R | 10-10-2013 |
20140107160 | CCR9 INHIBITORS AND METHODS OF USE THEREOF - The invention relates to compounds represented by Structural Formula I, which can bind to CCR9 receptors and block the binding of a ligand (e.g., TECK) to the receptors. The invention also relates to a method of inhibiting a function of CCR9, and to the use compounds represented by Structural Formula I in research, therapeutic, prophylactic and diagnostic methods. | 04-17-2014 |