CN103999416B - 使用最大似然比特流编码的信号的直接数字合成 - Google Patents

使用最大似然比特流编码的信号的直接数字合成 Download PDF

Info

Publication number
CN103999416B
CN103999416B CN201280060981.8A CN201280060981A CN103999416B CN 103999416 B CN103999416 B CN 103999416B CN 201280060981 A CN201280060981 A CN 201280060981A CN 103999416 B CN103999416 B CN 103999416B
Authority
CN
China
Prior art keywords
input signal
numeral
filter
digital
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201280060981.8A
Other languages
English (en)
Other versions
CN103999416A (zh
Inventor
K·阿扎德特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel Corp
Original Assignee
Intel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel Corp filed Critical Intel Corp
Publication of CN103999416A publication Critical patent/CN103999416A/zh
Application granted granted Critical
Publication of CN103999416B publication Critical patent/CN103999416B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30003—Arrangements for executing specific machine instructions
    • G06F9/30007—Arrangements for executing specific machine instructions to perform operations on data operands
    • G06F9/3001—Arithmetic instructions
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/15—Correlation function computation including computation of convolution operations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F5/00—Methods or arrangements for data conversion without changing the order or content of the data handled
    • G06F5/01—Methods or arrangements for data conversion without changing the order or content of the data handled for shifting, e.g. justifying, scaling, normalising
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30003—Arrangements for executing specific machine instructions
    • G06F9/30007—Arrangements for executing specific machine instructions to perform operations on data operands
    • G06F9/30036—Instructions to perform operations on packed data, e.g. vector, tile or matrix operations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/38—Concurrent instruction execution, e.g. pipeline, look ahead
    • G06F9/3885—Concurrent instruction execution, e.g. pipeline, look ahead using a plurality of independent parallel functional units
    • G06F9/3893—Concurrent instruction execution, e.g. pipeline, look ahead using a plurality of independent parallel functional units controlled in tandem, e.g. multiplier-accumulator
    • G06F9/3895—Concurrent instruction execution, e.g. pipeline, look ahead using a plurality of independent parallel functional units controlled in tandem, e.g. multiplier-accumulator for complex operations, e.g. multidimensional or interleaved address generators, macros
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0288—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3258—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits based on polynomial terms
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • H04L25/03203—Trellis search techniques
    • H04L25/03216—Trellis search techniques using the M-algorithm
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2334—Demodulator circuits; Receiver circuits using non-coherent demodulation using filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H04L27/2623—Reduction thereof by clipping
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/336—A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3209—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion the amplifier comprising means for compensating memory effects
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3212—Using a control circuit to adjust amplitude and phase of a signal in a signal path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3224—Predistortion being done for compensating memory effects
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3233—Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Computational Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Algebra (AREA)
  • Artificial Intelligence (AREA)
  • Data Mining & Analysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Databases & Information Systems (AREA)
  • Computing Systems (AREA)
  • Computer Hardware Design (AREA)
  • Complex Calculations (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Error Detection And Correction (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Image Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Transceivers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Executing Machine-Instructions (AREA)
  • Advance Control (AREA)

Abstract

提供了用于使用最大似然序列估计的直接合成RF信号的方法和装置。通过对数字RF输入信号执行最大似然序列估计来合成RF数字RF输入信号以产生数字流，以使得在由原型滤波器滤波后所产生的数字流产生基本上最小的误差。所述基本上的最小误差包括所述原型滤波器的数字输出与数字RF输入信号之间的差。所述数字流基本上与输入的数字RF信号相等。所述数字流可以被施加到模拟复原滤波器，并且模拟复原滤波器的输出包括与数字RF输入信号近似的模拟RF信号。

Description

使用最大似然比特流编码的信号的直接数字合成
对相关申请的交叉引用
本申请要求于2011年10月27日提交、题为“Software Digital Front End(SoftDFE)Signal Processing and Digital Radio”的美国专利临时申请No.61/552,242的优先权，其通过引用合并至此。
本申请涉及于2009年3月31日提交、题为“Methods and Apparatus for DirectSynthesis of RF Signals Using Delta-Sigma Modulator”的国际专利申请No.PCT/US09/38929，其通过引用合并至此。
技术领域
本发明涉及比特流编码技术，并且更具体地涉及使用最大似然比特流编码的RF信号的直接合成的技术。
背景技术
以通过将携带基带信号的初始信息乘以载波频率所获得的期望频率来传输通信信号。在射频(RF)发射器中，例如，通常通过将数字信号转换为模拟信号，然后使用一个或多个混合器将所述模拟信号与RF载波频率信号混合，来从携带数字基带信号的信息中获得期望的RF频率。
已经提出或建议了许多直接合成技术用于从携带数字基带信号的信息直接合成RF信号。例如，于2009年3月31日提交、题为“Methods and Apparatus for DirectSynthesis of RF Signals Using Delta-Sigma Modulator”的国际专利申请No.PCT/US09/38929公开了使用Δ-∑调制器直接合成RF信号的技术。
对于高精度数模转换，当可能进行大规模过采样(例如，在音频或无线基带应用中，信号带宽相对低并且10-1000次过采样是可能的)时，当使用一比特量化器、调制器(噪声整形器)(后接模拟滤波器)时，该Δ-∑调制器已经成功地用于实现高精度数模转换。然而，该Δ-∑调制器的反馈路径在较高采样频率(例如，1GHZ及更高)下难以实现。由于存在非线性量化器，算法在较低的时钟频率下难以并行并且因此难以实现。此外，输入信号通常被限制在所述参考电压的一部分，以确保调制器的稳定性(例如，所述技术的功率效率不是很高)。而且，较高的分辨率需要高的过采样率(100或更多)。
因此需要用于在较高采样频率下直接合成RF信号的改进的方法和设备。还需要用于RF信号的直接合成的稳定的调制器，在该稳定的调制器中过采样率降低并且提供相对于Δ-∑调制器改进的噪声性能，并且其能够在较高频率(几百兆赫兹到几千兆赫兹)下实现。例如，许多国家的GSM信号的中心频段在800MHz附近，并且WCDMA信号的中心频段在2.1GHz附近(基站发射器)。
发明内容
大体上，提供使用最大似然序列估计的直接合成RF信号的方法和设备。根据本发明的一方面，通过对数字RF输入信号执行最大似然序列估计来产生数字流，以使得产生的数字流在由原型滤波器滤波后产生基本上最小的误差来合成所述RF数字RF输入信号。所述基本上最小的误差包括所述原型滤波器的数字输出与所述数字RF输入信号之间的差。所述数字流基本上与所述输入数字RF信号相等。所述最大似然序列估计包括，例如，维特比解码、减少状态序列估计和/或M算法。
根据本发明的另一方面，所述数字流被施加到模拟复原滤波器。所述模拟复原滤波器的输出包括与所述数字RF输入信号近似的模拟RF信号。在不同实施例中，所述模拟复原滤波器包括，例如，无源滤波器、电阻-电感-电容(R-L-C)电路和/或传输线路。
所述原型滤波器具有与所述复原滤波器类似的频率响应。在不同实施例中，所述原型滤波器包括有限冲激响应滤波器或无限冲激响应滤波器。例如，所述原型滤波器可以是带通滤波器并且所述数字RF输入信号是在数字域被调制到RF频率的基带信号。或者，所述原型滤波器可以是基带滤波器并且所述数字RF输入信号是基带信号。
将通过参考以下详细描述和附图获得对于本发明的更全面的理解，以及本发明的进一步的特征和优点。
附图说明
图1示出了传统RF发射器；
图2示出了示例性Δ-∑调制器；
图3示出了示例性一比特Δ-∑调制器的频率响应；
图4是包含本发明的一些方面的示例的最大似然比特流编码系统的示意方块图；
图5是图4的最大似然比特流编码器的示例性实现方式的示意方块图；以及
图6A和6B分别示出了基带和带通实现方式的所述h(t)原型滤波器的示例性滤波器响应。
具体实施方式
本发明的一些方面提供了使用最大似然比特流编码的信号的直接数字合成。根据本发明的一个方面，提供了一种基于最大似然编码(例如，维特比或M算法)的编码器。示例性最大似然比特流编码器产生数字流数据(二进制一或零)的基本最优的序列，使得在模拟滤波之后产生的模拟波形(近似地)等于期望的信号。以这种方式，通过找到基本最优的比特(或多级)序列来近似数字信号，使得在滤波之后产生的模拟RF信号近似地等于数字版本的输入信号。
Δ-∑调制
图1示出了传统RF发射器100。如图1中所示，传统RF发射器100最初使用数模转换器110将携带基带信号的信息转换成数字信号。然后所述数字信号由低通滤波器120滤波并且使用混合器130将其与RF载波频率信号混合。然后，通过已知的方式，混合器130的输出由带通滤波器140滤波以减小带外噪声。
图2示出了根据于2009年3月31日提交、题为“Methods and Apparatus forDirect Synthesis of RF Signals Using Delta-Sigma Modulator”的国际专利申请No.PCT/US09/38929的示例性Δ-∑调制器200。如图2中所示，所述示例性Δ-∑调制器使用一比特量化器210和具有匹配频率极点/零点对的误差预测滤波器220。以下结合公式(2)进一步讨论所述匹配频率极点/零点对。示例性误差预测滤波器220为18阶。
由加法器230将所述一比特量化器210的输入值u与量化输出值q进行比较，产生量化误差e。由误差预测滤波器220处理所述量化误差e，以产生误差预测值e1，其被存储在寄存器240中持续一个时钟周期，然后由加法器250将其从所述输入信号r中减去，产生误差补偿输入值u。一般来说，误差预测滤波器220以已知方式利用对所述输入信号的一些认识来对所述信号进行滤波。例如，如果已知所述误差变化缓慢，所述误差预测滤波器220可以对随后的采样使用相同数值。
一般来说，所述一比特量化器210的输出提供所述输入信号的粗略近似。输入信号r可以是例如16比特数字值，并且由所述量化器210执行一比特量化(例如，所述量化可以基于所述输入信号的极性)来进行粗略模拟转换。与一比特量化器210相关的量化噪声e主要是带外的。如先前是指出的，由所述量化器210执行的一比特量化是固有线性的。
在此描述的示例性实施例中，假定量化误差e(n)与输入r(n)不相关。因此量化器输出q(t)的功率频谱密度Sq，q可以表示为频率f的函数，如下：
Sq，q(f)＝Sr，r(f)+(1一H(z))2Se，e(f) (1)
其中r是输入信号并且
误差预测滤波器220在期望频率f1、f2、...、fn上提供零点，并且在基本上与零点相同的频率上提供极点，其极点具有小于一的幅值αi。注意到，如对本领域普通技术人员所显而易见的，极点和零点的分布可以是固定的或者变化的，并且对于给定实现方式可以优化极点和零点的分布。
图3示出了示例性的18阶带通Δ-∑调制器200的频率响应300。如图3中所示，示例性误差预测滤波器220在2GHz附近展现为通带，并且具有100MHz的带宽。值得注意地，示例性误差预测性滤波器220展示了110dB的SFDR。
使用最大似然比特流编码的直接合成
图4是包含本发明的一些方面的示例性最大似然比特流编码系统400的示意方块图。如图4中所示的，最大似然比特流编码系统400包括最大似然比特流编码器500(以下结合图5进一步讨论)，以及模拟复原滤波器410。给所述最大似然比特流编码器500施加输入信号x。所述输入信号x包括数字RF信号。
如以下结合图5进一步讨论的，最大似然比特流编码器500产生与所述数字RF输入信号x基本上相等的数字流b，使得所产生的数字流b在原型滤波器滤波之后产生基本上最小的误差。如下所讨论的，所述误差定义为所述原型滤波器的数字输出与所述数字RF输入信号x之间的差。
所述数字流b可以是，例如，两级二进制信号，多级信号，以及NRZ、PAM、QAM(例如QPSK)信号中的一个或多个。
如图4中所示，将数字流b施加到模拟复原滤波器410以产生与所述数字RF输入信号x近似的模拟RF信号。所述模拟复原滤波器410通常是无源的，并且可以使用例如电阻-电感-电容(R-L-C)电路和/或传输线路实现。
本发明的一些方面认识到最大似然序列估计(MLSE)技术可以被应用于数据转换和编码，而不仅仅是更为典型的数据解码。
图5是包含本发明的一些方面的示例性最大似然比特流编码器500的示意方块图。如图5中所示，最大似然比特流编码器500接收数字RF输入信号x并且产生与所述数字RF输入信号x基本上相等的数字流b，使得在h(t)原型滤波器520滤波(以下结合图6进一步讨论)之后，所产生的数字流b产生基本上最小的误差e。如图5中所示，由加法器530获得所述示例性误差信号e，为所述原型滤波器520的数字输出(滤波的数字比特流b)与所述数字RF输入信号x之间的差。
一般来说，所述h(t)原型滤波器520具有中心基本上在数字输入信号x的频率附近的通带。所述h(t)原型滤波器520可以实现为例如有限冲激响应(FIR)或无限冲激响应(IIR)滤波器。
在阶段510，最大似然比特流编码器500找到最大似然比特流(比特流b)，其使用最大似然序列估计(MLSE)技术使所述误差e最小。所述MSLE技术包括，例如，维特比算法、减少状态序列估计(RSSE)和M算法中的一个或多个(以减少解码器的状态数，其可以很大)。如果抽头数为Ntaps，解码器状态数为2Ntaps，随着抽头数指数增长，并且可能不实用。对于M算法的一种讨论，参见，例如，E.F.Haratsch，“High-Speed VLSI Implementation of ReducedComplexity Sequence Estimation Algorithms With Application to GigabitEthernet1000BaseT”，Int’l Symposium on VLSI Technology，Systems，andApplications，Taipei(June 1999)，它们中的每一个通过引用，包含于此。
基于所述输入信号x的特征设计所述模拟复原滤波器410，并且所述原型滤波器520具有与所述复原滤波器410相似的频率响应。
所述MLSE可选地合并到其解码RF功率放大器(S类转换型放大器)或数字驱动模拟电路(例如，通常在数字或混合信号的片上系统(SOC)中使用的串行器-解串器(SerDes)的传输电路)的非线形存储器中以补偿这些设备的非线性。所述片上系统可以包括，例如，基带信号处理器、数字前端(DFE)或单芯片基站。
图6A和6B分别示出了基带和带通实现方式的h(t)原型滤波器620的示例性滤波器响应。如图6A中所示，所述h(t)基带原型滤波器620具有基带响应610(20MHz LTE的两载波)，例如40MHz LTE基带信号。示例性的对应的采样率为5.89824GSPS(＝30.62MSPS(LTE基带))。把响应部分620归因于由于数字预失真(DPD)而导致的频谱再生长。关注的信号带宽630，例如，在DPD达到3阶校正之后是120MHz(或者5阶校正为200MHz)。
如图6B中所示，h(t)带通原型滤波器620具有带通响应650以及关注的信号带宽660。在带通的情况中，太小的信号带宽难以实现，因为其导致非常高的Q滤波器(例如，2.14GHz/20MHzQ～100(过高)，然而2.14GHz/200MHz导致Q为10是可行的)。
在进一步变型中，最大似然编码器还可以被用作模数转换器，其中输入信号是模拟信号而不是数字信号，原型滤波器是模拟的，复原滤波器是数字的并且在模拟域实现所述最大似然解码器。
结论
已经参照数字逻辑框图描述了本发明的示例性实施例，如对本领域技术人员显而易见的，各种功能可以以软件程序、以电路元件或状态机实现的硬件，或以软件和硬件两者的组合，在数字域中实现，作为处理步骤。可以在例如数字信号处理器、专用集成电路或微控制器中使用这种软件。这种硬件和软件可以包含到实现在集成电路中的电路内。
因此，可以以方法和用于实现那些方法的设备的形式实现本发明的功能。可以以程序代码的方式实现本发明的一个或多个方面，例如，其存储在存储介质内、加载到机器中和/或由机器执行，其中，当所述程序代码被加载到机器中并由机器(诸如处理器)执行时，所述机器变成用于实现本发明的设备。当在通用处理器上实现时，所述程序代码片段与处理器结合以提供与专用逻辑电路类似地运行的设备。本发明还可以在集成电路、数字信号处理器、微处理器和微控制器中的一个或多个上实现。
应当理解，这里示出和描述的实施例及其变形仅仅是本发明的主旨的说明，本领域技术人员在不偏离本发明的范围和精神的情况下，可以实现各种修改。

Claims (10)

1.一种用于数字RF输入信号的直接数字合成的方法，包括：
对所述数字RF输入信号执行最大似然序列估计以产生数字流，使得在通过原型滤波器滤波后产生的数字流产生基本上最小的误差，其中所述最大似然序列估计包括M算法，并且其中所述原型滤波器包括无限冲激响应（IIR）滤波器。
2.如权利要求1所述的方法，其中所述基本上最小的误差包括所述原型滤波器的数字输出与所述数字RF输入信号之间的差。
3.如权利要求1所述的方法，还包括将所述数字流施加到后接模拟复原滤波器的转换型功率放大器和模拟复原滤波器中的一个或多个的步骤。
4.一种数字RF输入信号合成器，包括：
最大似然序列估计器，用于处理所述数字RF输入信号以产生数字流，使得在通过原型滤波器滤波后产生的数字流产生基本上最小的误差，其中所述最大似然序列估计包括M算法，并且其中所述原型滤波器包括无限冲激响应（IIR）滤波器。
5.如权利要求4所述的数字RF输入信号合成器，其中所述基本上最小的误差包括所述原型滤波器的数字输出与所述数字RF输入信号之间的差。
6.如权利要求4所述的数字RF输入信号合成器，其中所述数字流被施加到模拟复原滤波器，并且所述模拟复原滤波器的输出包括与所述数字RF输入信号近似的模拟RF信号。
7. 如权利要求4所述的数字RF输入信号合成器，其中所述数字流与所述输入数字RF信号基本上相等。
8. 一种用于数字RF输入信号合成的系统，包括
存储器；以及
耦合到所述存储器的至少一个硬件设备，可操作为：
对所述数字RF输入信号执行最大似然序列估计以产生数字流，使得在通过原型滤波器滤波后产生的数字流产生基本上最小的误差，其中所述最大似然序列估计包括M算法，并且其中所述原型滤波器包括无限冲激响应（IIR）滤波器。
9.如权利要求8所述的系统，其中所述基本上最小的误差包括所述原型滤波器的数字输出与所述数字RF输入信号之间的差。
10.如权利要求8所述的系统，其中所述数字流被施加到模拟复原滤波器，并且所述模拟复原滤波器的输出包括与所述数字RF输入信号近似的模拟RF信号。
CN201280060981.8A 2011-10-27 2012-10-26 使用最大似然比特流编码的信号的直接数字合成 Active CN103999416B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201161552242P 2011-10-27 2011-10-27
US61/552,242 2011-10-27
PCT/US2012/062175 WO2013063434A1 (en) 2011-10-27 2012-10-26 Direct digital synthesis of signals using maximum likelihood bit-stream encoding

Publications (2)

Publication Number Publication Date
CN103999416A CN103999416A (zh) 2014-08-20
CN103999416B true CN103999416B (zh) 2017-03-08

Family

ID=48168570

Family Applications (8)

Application Number Title Priority Date Filing Date
CN201280060788.4A Expired - Fee Related CN103999417B (zh) 2011-10-27 2012-10-26 软件数字前端信号处理
CN201710321171.8A Active CN107276936B (zh) 2011-10-27 2012-10-26 基于块的波峰因子降低（cfr）
CN201280060980.3A Expired - Fee Related CN103999078B (zh) 2011-10-27 2012-10-26 具有包含用于fir滤波的矢量卷积函数的指令集的矢量处理器
CN201280060978.6A Active CN103988473B (zh) 2011-10-27 2012-10-26 基于块的波峰因子降低(cfr)
CN201280060981.8A Active CN103999416B (zh) 2011-10-27 2012-10-26 使用最大似然比特流编码的信号的直接数字合成
CN201810754065.3A Pending CN109144570A (zh) 2011-10-27 2012-10-26 具有带有复数指数非线性函数的指令集的数字处理器
CN201280060773.8A Pending CN103975564A (zh) 2011-10-27 2012-10-26 具有拥有由用户定义的用于数字预失真(dpd)以及其它非线性应用的非线性函数的指令集的处理器
CN201280060979.0A Expired - Fee Related CN103999039B (zh) 2011-10-27 2012-10-26 具有带有复数指数非线性函数的指令集的数字处理器

Family Applications Before (4)

Application Number Title Priority Date Filing Date
CN201280060788.4A Expired - Fee Related CN103999417B (zh) 2011-10-27 2012-10-26 软件数字前端信号处理
CN201710321171.8A Active CN107276936B (zh) 2011-10-27 2012-10-26 基于块的波峰因子降低（cfr）
CN201280060980.3A Expired - Fee Related CN103999078B (zh) 2011-10-27 2012-10-26 具有包含用于fir滤波的矢量卷积函数的指令集的矢量处理器
CN201280060978.6A Active CN103988473B (zh) 2011-10-27 2012-10-26 基于块的波峰因子降低(cfr)

Family Applications After (3)

Application Number Title Priority Date Filing Date
CN201810754065.3A Pending CN109144570A (zh) 2011-10-27 2012-10-26 具有带有复数指数非线性函数的指令集的数字处理器
CN201280060773.8A Pending CN103975564A (zh) 2011-10-27 2012-10-26 具有拥有由用户定义的用于数字预失真(dpd)以及其它非线性应用的非线性函数的指令集的处理器
CN201280060979.0A Expired - Fee Related CN103999039B (zh) 2011-10-27 2012-10-26 具有带有复数指数非线性函数的指令集的数字处理器

Country Status (6)

Country Link
US (14) US9280315B2 (zh)
EP (6) EP2772033A4 (zh)
JP (7) JP6189848B2 (zh)
KR (7) KR102015680B1 (zh)
CN (8) CN103999417B (zh)
WO (6) WO2013066756A2 (zh)

Families Citing this family (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9363068B2 (en) 2010-08-03 2016-06-07 Intel Corporation Vector processor having instruction set with sliding window non-linear convolutional function
RU2012102842A (ru) 2012-01-27 2013-08-10 ЭлЭсАй Корпорейшн Инкрементное обнаружение преамбулы
US9280315B2 (en) 2011-10-27 2016-03-08 Intel Corporation Vector processor having instruction set with vector convolution function for fir filtering
KR20130080939A (ko) * 2012-01-06 2013-07-16 삼성전자주식회사 입력 신호의 피크 제거 방법 및 장치
US9100253B2 (en) * 2012-08-07 2015-08-04 Freescale Semiconductor, Inc. Block-based crest factor reduction
WO2014085976A1 (en) * 2012-12-04 2014-06-12 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for crest factor reduction
US9118512B2 (en) 2013-03-06 2015-08-25 Qualcomm Incorporated Combined imbalance compensation and equalization of a signal
US9319916B2 (en) 2013-03-15 2016-04-19 Isco International, Llc Method and appartus for signal interference processing
US9923595B2 (en) 2013-04-17 2018-03-20 Intel Corporation Digital predistortion for dual-band power amplifiers
GB2514595B (en) * 2013-05-30 2017-10-18 Imp Innovations Ltd Method and apparatus for estimating frequency domain representation of signals
EP3042478B1 (en) * 2013-09-03 2018-08-22 Telefonaktiebolaget LM Ericsson (publ) Method and apparatus for application of distortion shaping when using peak-to-average ratio reduction
US9619227B2 (en) * 2013-11-15 2017-04-11 Qualcomm Incorporated Vector processing engines (VPEs) employing tapped-delay line(s) for providing precision correlation / covariance vector processing operations with reduced sample re-fetching and power consumption, and related vector processor systems and methods
MX359006B (es) 2013-11-26 2018-09-12 Plusn Llc Sistema y método para agregación de portadoras de radiofrecuencia.
US9331725B2 (en) 2014-01-03 2016-05-03 Maxlinear, Inc. Method and system for crest factor reduction
US9794888B2 (en) 2014-05-05 2017-10-17 Isco International, Llc Method and apparatus for increasing performance of a communication link of a communication node
US9628119B2 (en) * 2014-06-27 2017-04-18 Nxp Usa, Inc. Adaptive high-order nonlinear function approximation using time-domain volterra series to provide flexible high performance digital pre-distortion
KR101567229B1 (ko) 2014-07-07 2015-11-09 현대자동차주식회사 요소수 오버플로우 방지타입 요소수 필러 넥 및 요소수 탱크, 실외형 필러넥을 갖춘 요소수 후처리 시스템
US20160034421A1 (en) * 2014-08-01 2016-02-04 Infineon Technologies Ag Digital pre-distortion and post-distortion based on segmentwise piecewise polynomial approximation
US10261939B2 (en) * 2014-08-20 2019-04-16 Nxp Usa, Inc. Performing lookup table operations on a single-instruction multiple data processor
GB2531532B (en) * 2014-10-20 2020-12-30 Cambridge Consultants Radio frequency amplifier
EP3223438B1 (en) 2014-11-21 2020-03-25 Huawei Technologies Co. Ltd. Method, apparatus and device for determining modulation and coding scheme
JP2016115952A (ja) * 2014-12-10 2016-06-23 富士通株式会社 歪補償装置及び歪補償方法
WO2016108651A1 (ko) 2014-12-30 2016-07-07 주식회사 쏠리드 분산 안테나 시스템에서의 cfr 배치 방법
US10693527B2 (en) 2014-12-30 2020-06-23 Solid, Inc. Distributed antenna system including crest factor reduction module disposed at optimum position
KR102226249B1 (ko) 2014-12-30 2021-03-10 주식회사 쏠리드 분산 안테나 시스템에서의 순방향 디지털 신호 합산 방법
US9979421B2 (en) * 2015-03-02 2018-05-22 Eta Devices, Inc. Digital pre-distortion (DPD) training and calibration system and related techniques
EP3651386B1 (en) 2015-05-04 2023-08-23 ISCO International, LLC Method and apparatus for increasing the performance of communication paths for communication nodes
US9898286B2 (en) * 2015-05-05 2018-02-20 Intel Corporation Packed finite impulse response (FIR) filter processors, methods, systems, and instructions
CN105024960B (zh) * 2015-06-23 2018-11-09 大唐移动通信设备有限公司 一种dpd系统
CN106341355A (zh) * 2015-07-09 2017-01-18 深圳市中兴微电子技术有限公司 数字中频处理系统检测方法及装置
EP3362804B1 (en) * 2015-10-14 2024-01-17 WiTricity Corporation Phase and amplitude detection in wireless energy transfer systems
US9590668B1 (en) * 2015-11-30 2017-03-07 NanoSemi Technologies Digital compensator
JP7083311B2 (ja) * 2015-12-29 2022-06-10 ブルー ダニューブ システムズ， インク． マルチビームクレストファクタ低減
US20170322906A1 (en) * 2016-05-04 2017-11-09 Chengdu Haicun Ip Technology Llc Processor with In-Package Look-Up Table
US9749161B1 (en) * 2016-02-23 2017-08-29 Nxp Usa, Inc. Fixed-point conjugate gradient digital pre-distortion (DPD) adaptation
US10033413B2 (en) * 2016-05-19 2018-07-24 Analog Devices Global Mixed-mode digital predistortion
BR112016024655B1 (pt) * 2016-05-24 2024-01-09 Ericsson Telecomunicações S.A Método para administrar um fluxo de bits, codificador,decodificador, e, meio de armazenamento legível por computador
CA3024175A1 (en) 2016-06-01 2017-12-07 Isco International, Llc Method and apparatus for performing signal conditioning to mitigate interference detected in a communication system
US9787336B1 (en) * 2016-09-29 2017-10-10 Intel IP Corporation Device and method of pre-distortion of power amplifier input signals
EP3523856A4 (en) 2016-10-07 2020-06-24 NanoSemi, Inc. DIGITAL BEAM ORIENTATION PREDISTORSION
EP3586439A4 (en) 2017-02-25 2021-01-06 NanoSemi, Inc. MULTI-BAND DIGITAL PRE-STORAGE DEVICE
US10298279B2 (en) 2017-04-05 2019-05-21 Isco International, Llc Method and apparatus for increasing performance of communication paths for communication nodes
US10141961B1 (en) 2017-05-18 2018-11-27 Nanosemi, Inc. Passive intermodulation cancellation
US10931318B2 (en) 2017-06-09 2021-02-23 Nanosemi, Inc. Subsampled linearization system
US11115067B2 (en) 2017-06-09 2021-09-07 Nanosemi, Inc. Multi-band linearization system
US11323188B2 (en) 2017-07-12 2022-05-03 Nanosemi, Inc. Monitoring systems and methods for radios implemented with digital predistortion
CN107395294A (zh) * 2017-07-12 2017-11-24 电子科技大学 一种发射机射频非理想特性矫正方法
CN107359864B (zh) * 2017-07-25 2020-08-21 中国工程物理研究院电子工程研究所 频率捷变功率放大器的自适应捷变数字预失真方法
US10284313B2 (en) 2017-08-09 2019-05-07 Isco International, Llc Method and apparatus for monitoring, detecting, testing, diagnosing and/or mitigating interference in a communication system
US11803377B2 (en) 2017-09-08 2023-10-31 Oracle International Corporation Efficient direct convolution using SIMD instructions
US11303251B2 (en) 2017-10-02 2022-04-12 Nanosemi, Inc. Digital predistortion adjustment based on determination of load condition characteristics
US10949766B2 (en) * 2017-10-15 2021-03-16 Gsi Technology Inc. Precise exponent and exact softmax computation
EP3704798B1 (en) * 2017-11-02 2023-07-26 B.G. Negev Technologies and Applications Ltd., at Ben-Gurion University Digital resolution enhancement for high speed digital-to-analog converters
TW201924294A (zh) * 2017-11-16 2019-06-16 財團法人資訊工業策進會 基於正交分頻多工的基頻處理裝置與基頻處理方法
KR102402248B1 (ko) * 2018-04-26 2022-05-26 엘지전자 주식회사 전력 제어를 수행하는 전자 기기
US10644657B1 (en) 2018-05-11 2020-05-05 Nanosemi, Inc. Multi-band digital compensator for a non-linear system
US10432240B1 (en) 2018-05-22 2019-10-01 Micron Technology, Inc. Wireless devices and systems including examples of compensating power amplifier noise
US11863210B2 (en) 2018-05-25 2024-01-02 Nanosemi, Inc. Linearization with level tracking
US10931238B2 (en) 2018-05-25 2021-02-23 Nanosemi, Inc. Linearization with envelope tracking or average power tracking
CN112640299A (zh) 2018-05-25 2021-04-09 纳诺塞米有限公司 变化操作条件下的数字预失真
US10594530B2 (en) * 2018-05-29 2020-03-17 Qualcomm Incorporated Techniques for successive peak reduction crest factor reduction
CN108733349B (zh) * 2018-07-27 2023-05-05 珠海一微半导体股份有限公司 一种基于定点数的三角函数运算电路
KR102040120B1 (ko) * 2018-07-27 2019-11-05 주식회사 크립토랩 근사 암호화된 암호문에 대한 연산을 수행하는 장치 및 방법
US10623222B2 (en) * 2018-08-30 2020-04-14 Xilinx, Inc. Vectorized peak detection for signal processing
US10819540B2 (en) * 2018-09-11 2020-10-27 Hughes Network Systems, Llc Radio frequency impairments compensator for broadband quadrature-conversion architectures
CN111260536B (zh) * 2018-12-03 2022-03-08 中国科学院沈阳自动化研究所 可变参数的数字图像多尺度卷积处理器及其实现方法
WO2020113946A1 (en) * 2018-12-07 2020-06-11 Huawei Technologies Co., Ltd. I/q imbalance compensation
KR20200082617A (ko) 2018-12-31 2020-07-08 삼성전자주식회사 메모리 장치를 이용한 계산 방법 및 이를 수행하는 메모리 장치
US10985951B2 (en) 2019-03-15 2021-04-20 The Research Foundation for the State University Integrating Volterra series model and deep neural networks to equalize nonlinear power amplifiers
US11327754B2 (en) * 2019-03-27 2022-05-10 Intel Corporation Method and apparatus for approximation using polynomials
US10763905B1 (en) 2019-06-07 2020-09-01 Micron Technology, Inc. Wireless devices and systems including examples of mismatch correction scheme
KR20210012235A (ko) * 2019-07-24 2021-02-03 삼성전자주식회사 전자 장치 및 전자 장치의 무선 통신 시스템
EP3772837A1 (en) * 2019-08-05 2021-02-10 Rohde & Schwarz GmbH & Co. KG Transmitter module, data transmission system and data transmission method
EP4052371A4 (en) * 2019-10-29 2023-08-09 Telefonaktiebolaget Lm Ericsson (Publ) RECURSIVE LINEARIZATION OF A NONLINEAR MODEL FOR AN ELECTRONIC DEVICE
FR3104859B1 (fr) * 2019-12-12 2021-11-19 Thales Sa Procede de decouplage de signaux dans des systemes d’emission/reception
US11012273B1 (en) 2019-12-31 2021-05-18 Hughes Network Systems, Llc Compensating for frequency-dependent I-Q phase imbalance
US10972139B1 (en) 2020-04-15 2021-04-06 Micron Technology, Inc. Wireless devices and systems including examples of compensating power amplifier noise with neural networks or recurrent neural networks
US10992326B1 (en) 2020-05-19 2021-04-27 Nanosemi, Inc. Buffer management for adaptive digital predistortion
CN111814107B (zh) * 2020-07-10 2021-03-12 上海擎昆信息科技有限公司 一种高精度实现平方根倒数的计算系统及其计算方法
US11496341B2 (en) 2020-08-13 2022-11-08 Micron Technology, Inc. Wireless devices and systems including examples of compensating I/Q imbalance with neural networks or recurrent neural networks
CN113517865B (zh) * 2021-04-20 2022-11-22 重庆邮电大学 一种基于记忆多项式的功放模型及其硬件实现方法
KR20230000189A (ko) * 2021-06-24 2023-01-02 주식회사 쏠리드 통신 장치 및 그 cfr 처리 방법
US20220413853A1 (en) * 2021-06-25 2022-12-29 Intel Corporation Apparatuses, methods, and systems for a packed data convolution instruction with shift control and width control
CN115022400B (zh) * 2021-06-28 2023-12-01 南京巅峰数据服务有限公司 一种软件数字前端信号处理系统
CN115603815A (zh) * 2021-07-07 2023-01-13 富士通株式会社（Jp） 失真器系数更新装置、方法和数字预失真装置
US11770284B1 (en) 2022-05-23 2023-09-26 Meta Platforms, Inc. Per carrier scaling of a cancellation pulse of a multi-carrier signal

Family Cites Families (217)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3506918A (en) * 1966-12-27 1970-04-14 Xerox Corp Data channel equalization detector
US3946214A (en) * 1972-07-05 1976-03-23 Rixon, Incorporated Multi-level digital filter
NL8304210A (nl) 1983-12-07 1985-07-01 Hollandse Signaalapparaten Bv Digitaal impulscompressiefilter.
NL8402318A (nl) * 1984-07-23 1986-02-17 Philips Nv Inrichting voor het genereren van een hoekgemoduleerd draaggolfsignaal van constante amplitude in responsie op datasignalen.
EP0365226A3 (en) * 1988-10-17 1991-02-20 Raytheon Company Cordic apparatus and method for approximating the magnitude and phase of a complex number
US5031195A (en) * 1989-06-05 1991-07-09 International Business Machines Corporation Fully adaptive modem receiver using whitening matched filtering
SE467087B (sv) 1989-06-05 1992-05-25 Hoernell Elektrooptik Ab Svetshjaelm foersedd med ett s k snabbfilter
JPH04249429A (ja) * 1991-02-06 1992-09-04 Fujitsu Ltd ディジタルデータ伝送装置
JP3053921B2 (ja) * 1991-09-11 2000-06-19 株式会社東芝 宇宙航行体の運動制御装置
JP3042182B2 (ja) * 1992-05-29 2000-05-15 日本電気株式会社 再生データ検出方式
US5276633A (en) * 1992-08-14 1994-01-04 Harris Corporation Sine/cosine generator and method
US5550683A (en) * 1992-12-11 1996-08-27 Eastman Kodak Company Magnetic recording channel employing a non-ideal d.c.-free equalizer and a d.c.-free modulation code
WO1994019892A1 (en) * 1993-02-17 1994-09-01 Motorola Inc. Multiple-modulation communication system
US5416845A (en) * 1993-04-27 1995-05-16 Noise Cancellation Technologies, Inc. Single and multiple channel block adaptive methods and apparatus for active sound and vibration control
US5381357A (en) * 1993-05-28 1995-01-10 Grumman Corporation Complex adaptive fir filter
US5442353A (en) * 1993-10-25 1995-08-15 Motorola, Inc. Bandpass sigma-delta analog-to-digital converter (ADC), method therefor, and receiver using same
US5563864A (en) * 1993-12-24 1996-10-08 Seiko Epson Corporation Information recording and reproducing apparatus
US5450083A (en) * 1994-03-09 1995-09-12 Analog Devices, Inc. Two-stage decimation filter
SE502868C2 (sv) 1994-04-26 1996-02-05 Hoernell Elektrooptik Ab Svetssnabbfilter med förbättrade vinkelegenskaper
US5530661A (en) * 1994-10-05 1996-06-25 Winnov Data bit-slicing apparatus and method for computing convolutions
US5646950A (en) * 1994-11-18 1997-07-08 Seagate Technology, Inc. Matched spectral null codes for partial response channels
US5706314A (en) * 1995-01-04 1998-01-06 Hughes Electronics Joint maximum likelihood channel and timing error estimation
US5953241A (en) * 1995-08-16 1999-09-14 Microunity Engeering Systems, Inc. Multiplier array processing system with enhanced utilization at lower precision for group multiply and sum instruction
US7483935B2 (en) * 1995-08-16 2009-01-27 Microunity Systems Engineering, Inc. System and method to implement a matrix multiply unit of a broadband processor
SE509569C2 (sv) 1995-10-26 1999-02-08 Hoernell International Ab Vätskekristallslutarkonstruktion
US5864689A (en) 1995-12-05 1999-01-26 Advanced Micro Devices, Inc. Microprocessor configured to selectively invoke a microcode DSP function or a program subroutine in response to a target address value of branch instruction
JPH09245435A (ja) * 1996-03-05 1997-09-19 Sony Corp データ再生装置
US7046694B2 (en) * 1996-06-19 2006-05-16 Digital Radio Express, Inc. In-band on-channel digital broadcasting method and system
US6275543B1 (en) * 1996-10-11 2001-08-14 Arraycomm, Inc. Method for reference signal generation in the presence of frequency offsets in a communications station with spatial processing
US5893066A (en) * 1996-10-15 1999-04-06 Samsung Electronics Co. Ltd. Fast requantization apparatus and method for MPEG audio decoding
JP3790307B2 (ja) * 1996-10-16 2006-06-28 株式会社ルネサステクノロジ データプロセッサ及びデータ処理システム
US5966416A (en) 1996-11-21 1999-10-12 Dsp Group, Inc. Verification of PN synchronization in a spread-spectrum communications receiver
FR2758926B1 (fr) * 1997-01-24 1999-04-30 France Telecom Procede d'egalisation multicapteurs dans un recepteur radioelectrique comportant un nombre determine de voies de reception et recepteur correspondant
US5926406A (en) 1997-04-30 1999-07-20 Hewlett-Packard, Co. System and method for calculating floating point exponential values in a geometry accelerator
DE69723477T2 (de) * 1997-05-15 2004-05-27 International Business Machines Corp. Anordnung und verfahren zur rauschvorhersagenden maximal-wahrscheinlichkeitsdetektion
US5949831A (en) * 1997-05-21 1999-09-07 International Business Machines Corporation Method and apparatus for data detection for PRML data channels
US5990894A (en) 1997-06-16 1999-11-23 Sun Microsystems, Inc. Method for implementing the power function DP and computer graphics system employing the same
US6151682A (en) * 1997-09-08 2000-11-21 Sarnoff Corporation Digital signal processing circuitry having integrated timing information
US6446193B1 (en) * 1997-09-08 2002-09-03 Agere Systems Guardian Corp. Method and apparatus for single cycle processing of data associated with separate accumulators in a dual multiply-accumulate architecture
JP3369448B2 (ja) 1997-09-29 2003-01-20 シャープ株式会社 ディジタルスイッチングアンプ
JP3884172B2 (ja) * 1997-10-02 2007-02-21 株式会社東芝 可変長復号化装置および復号化方法
US5864703A (en) * 1997-10-09 1999-01-26 Mips Technologies, Inc. Method for providing extended precision in SIMD vector arithmetic operations
US20010040930A1 (en) * 1997-12-19 2001-11-15 Duane L. Abbey Multi-band direct sampling receiver
US6163788A (en) * 1998-06-25 2000-12-19 Industrial Technology Research Institute Programmable finite impulse response processor with scalable dynamic data range
US6128638A (en) 1998-07-23 2000-10-03 Silicon Graphics, Inc. Method and apparatus for calculating X to the Exponent of Y
JP3514978B2 (ja) * 1998-07-31 2004-04-05 シャープ株式会社 ディジタルスイッチングアンプ
US6150976A (en) 1998-08-12 2000-11-21 Aai Corporation Synthesis of overlapping chirp waveforms
US6158027A (en) * 1998-08-31 2000-12-05 International Business Machines Corporation Enhanced noise-predictive maximum likelihood (NPML) data detection method and apparatus for direct access storage device (DASD)
US6137643A (en) * 1998-10-06 2000-10-24 International Business Machines Corporation Thermal asperity detection with long magnet rejection for direct access storage device (DASD)
GB9823145D0 (en) * 1998-10-23 1998-12-16 Philips Electronics Nv Radio communication system
DE19850642C2 (de) * 1998-11-03 2003-08-07 Infineon Technologies Ag Verfahren zur Reduzierung des Crest-Faktors eines Signals
US6477200B1 (en) * 1998-11-09 2002-11-05 Broadcom Corporation Multi-pair gigabit ethernet transceiver
JP4057729B2 (ja) 1998-12-29 2008-03-05 株式会社日立製作所 フーリエ変換方法およびプログラム記録媒体
JP3699602B2 (ja) * 1999-01-07 2005-09-28 富士通株式会社 プリディストーション装置及びその方法
GB2348755B (en) * 1999-04-01 2001-03-07 Wireless Systems Int Ltd Signal processing
US6597745B1 (en) * 1999-04-06 2003-07-22 Eric M. Dowling Reduced complexity multicarrier precoder
WO2000065791A1 (en) * 1999-04-22 2000-11-02 Broadcom Corporation Gigabit ethernet with timing offsets between the twisted pairs
US6643814B1 (en) * 1999-07-12 2003-11-04 International Business Machines Corporation Maximum transition run encoding and decoding systems
US6356146B1 (en) * 1999-07-13 2002-03-12 Pmc-Sierra, Inc. Amplifier measurement and modeling processes for use in generating predistortion parameters
US6798843B1 (en) * 1999-07-13 2004-09-28 Pmc-Sierra, Inc. Wideband digital predistortion linearizer for nonlinear amplifiers
US6529992B1 (en) 1999-07-26 2003-03-04 Iomega Corporation Self-contained application disk for automatically launching application software or starting devices and peripherals
JP4239314B2 (ja) * 1999-09-06 2009-03-18 ソニー株式会社 符号化装置および方法、復号装置および方法、および記録媒体
US6580768B1 (en) * 1999-11-09 2003-06-17 International Business Machines Corporation Adaptive maximum likelihood detection
US6844880B1 (en) 1999-12-06 2005-01-18 Nvidia Corporation System, method and computer program product for an improved programmable vertex processing model with instruction set
US7200180B2 (en) * 1999-12-30 2007-04-03 Tioga Technologies, Inc. Data transceiver with filtering and precoding
CA2293953A1 (en) 2000-01-05 2001-07-05 Ipros Corporation A method and system for implementing a coprocessor
US6690739B1 (en) * 2000-01-14 2004-02-10 Shou Yee Mui Method for intersymbol interference compensation
US6973138B1 (en) * 2000-01-26 2005-12-06 Pmc-Sierra, Inc. Advanced adaptive pre-distortion in a radio frequency transmitter
JP2001244848A (ja) * 2000-02-28 2001-09-07 Kawasaki Steel Corp スペクトラム拡散通信受信装置
FI20000820A (fi) * 2000-04-06 2001-10-07 Nokia Networks Oy Kanavakorjaimen optimointi
US6741662B1 (en) 2000-04-17 2004-05-25 Intel Corporation Transmitter linearization using fast predistortion
US7584234B2 (en) 2002-05-23 2009-09-01 Qsigma, Inc. Method and apparatus for narrow to very wide instruction generation for arithmetic circuitry
US7284027B2 (en) 2000-05-15 2007-10-16 Qsigma, Inc. Method and apparatus for high speed calculation of non-linear functions and networks using non-linear function calculations for digital signal processing
US7617268B2 (en) 2000-05-15 2009-11-10 Qsigma, Inc. Method and apparatus supporting non-additive calculations in graphics accelerators and digital signal processors
US7061991B2 (en) * 2000-07-21 2006-06-13 Pmc - Sierra Inc. Systems and methods for the reduction of peak to average signal levels of multi-bearer single-carrier and multi-carrier waveforms
KR100819623B1 (ko) * 2000-08-09 2008-04-04 소니 가부시끼 가이샤 음성 데이터의 처리 장치 및 처리 방법
JP3634250B2 (ja) * 2000-08-23 2005-03-30 日本電信電話株式会社 ソフトウェア無線装置
DE10044227A1 (de) * 2000-09-07 2002-04-04 Nanotron Ges Fuer Mikrotechnik Verfahren zum Codieren und Decodieren eines Informationssymbols
FI113514B (fi) * 2000-11-15 2004-04-30 Elektrobit Oy Menetelmä radiokanavan simuloimiseksi ja kanavasimulaattori
US7082220B2 (en) * 2001-01-25 2006-07-25 Sony Corporation Data processing apparatus
US7752419B1 (en) 2001-03-22 2010-07-06 Qst Holdings, Llc Method and system for managing hardware resources to implement system functions using an adaptive computing architecture
SE0101175D0 (sv) * 2001-04-02 2001-04-02 Coding Technologies Sweden Ab Aliasing reduction using complex-exponential-modulated filterbanks
ES2323856T3 (es) 2001-06-29 2009-07-27 Nokia Corporation Desequilibrio de la fase iq.
GB2377596B (en) 2001-07-11 2004-09-01 Cambridge Broadband Ltd Communications protocol
US6976043B2 (en) * 2001-07-30 2005-12-13 Ati Technologies Inc. Technique for approximating functions based on lagrange polynomials
US7158567B2 (en) * 2001-09-11 2007-01-02 Vitesse Semiconductor Corporation Method and apparatus for improved high-speed FEC adaptive equalization
JP4016207B2 (ja) * 2001-10-03 2007-12-05 ソニー株式会社 符号化方法および復号方法
US6961395B2 (en) * 2001-11-16 2005-11-01 Nortel Networks Limited Time variant filter implementation
US7107304B2 (en) * 2001-11-30 2006-09-12 Apple Computer, Inc. Single-channel convolution in a vector processing computer system
US7167513B2 (en) 2001-12-31 2007-01-23 Intel Corporation IQ imbalance correction
JP4118584B2 (ja) * 2002-04-02 2008-07-16 三菱電機株式会社 マルチキャリア送信装置
US6801086B1 (en) * 2002-04-03 2004-10-05 Andrew Corporation Adaptive digital pre-distortion using amplifier model that incorporates frequency-dependent non-linearities
EP1414036A4 (en) * 2002-05-28 2008-01-16 Sony Corp SIGNAL PROCESSING APPARATUS AND METHOD, AND REPRODUCTION DEVICE FOR DIGITAL DATA
US20030231726A1 (en) * 2002-06-12 2003-12-18 Andreas Schuchert Arrangement and method for frequency domain compensation of OFDM signals with IQ imbalance
US7212584B2 (en) * 2002-08-05 2007-05-01 Hitachi Kokusai Electric Inc. Distortion compensator
US7697591B2 (en) * 2002-08-26 2010-04-13 Texas Instruments Incorporated Crest factor reduction processor for wireless communications
JP4091047B2 (ja) * 2002-10-31 2008-05-28 深▲川▼市中▲興▼通▲訊▼股▲分▼有限公司 広帯域プリディストーション線形化の方法およびシステム
TW571754U (en) 2002-12-20 2004-01-11 Taroko Internat Co Ltd Protective mask with side window
US20040160860A1 (en) * 2003-02-18 2004-08-19 Hongwei Song Magneto-optical recording/reproducing method and apparatus
JP3837742B2 (ja) * 2003-02-21 2006-10-25 ソニー株式会社 復号装置および復号方法、記録再生装置、プログラム格納媒体、並びに、プログラム
JP3769753B2 (ja) * 2003-03-24 2006-04-26 ソニー株式会社 符号化装置および符号化方法、記録媒体、並びにプログラム
US6987953B2 (en) * 2003-03-31 2006-01-17 Nortel Networks Limited Digital transmitter and method
JP4134797B2 (ja) * 2003-04-14 2008-08-20 株式会社デンソー ノッキング検出装置
US7110477B2 (en) * 2003-04-29 2006-09-19 Texas Instruments Incorporated Gaussian frequency shift keying digital demodulator
US7388904B2 (en) * 2003-06-03 2008-06-17 Vativ Technologies, Inc. Near-end, far-end and echo cancellers in a multi-channel transceiver system
US7133644B2 (en) * 2003-06-06 2006-11-07 Interdigital Technology Corporation Digital baseband system and process for compensating for analog radio transmitter impairments
CN100444525C (zh) * 2003-06-06 2008-12-17 美商内数位科技公司 补偿模拟无线传送器损害的数字基带系统
US6975167B2 (en) 2003-07-03 2005-12-13 Icefyre Semiconductor Corporation Adaptive predistortion for a transmit system with gain, phase and delay adjustments
JP4356384B2 (ja) 2003-07-09 2009-11-04 日本電気株式会社 非線形補償回路と送信装置並びに非線形補償方法
JP4638695B2 (ja) * 2003-07-31 2011-02-23 パナソニック株式会社 信号処理装置及びその方法
US20050036575A1 (en) * 2003-08-15 2005-02-17 Nokia Corporation Method and apparatus providing low complexity equalization and interference suppression for SAIC GSM/EDGE receiver
TW595111B (en) * 2003-09-03 2004-06-21 Mediatek Inc Fast data recovery digital data slicer
US7461116B2 (en) 2003-09-17 2008-12-02 Agility Design Solutions Inc. Emulation of a fixed point operation using a corresponding floating point operation
JP4396233B2 (ja) * 2003-11-13 2010-01-13 パナソニック株式会社 複素指数変調フィルタバンクの信号分析方法、信号合成方法、そのプログラム及びその記録媒体
US6864818B1 (en) * 2003-12-09 2005-03-08 Texas Instruments Incorporated Programmable bandpass analog to digital converter based on error feedback architecture
KR20050064485A (ko) * 2003-12-23 2005-06-29 삼성전자주식회사 전력 증폭기의 비선형 왜곡 특성을 보상하는 전치보상장치 및 방법
US7656931B2 (en) * 2003-12-31 2010-02-02 Ut-Battelle, Llc Hybrid spread spectrum radio system
US7441105B1 (en) * 2004-01-02 2008-10-21 Altera Corporation Reducing multiplexer circuitry for operand select logic associated with a processor
US6998910B2 (en) * 2004-01-22 2006-02-14 Texas Instruments Incorporated Amplifier using delta-sigma modulation
US20080253011A1 (en) * 2004-01-23 2008-10-16 Matusuhita Electric Industrial Co., Ltd. Signal Processing Device and Signal Processing Method
US6933865B1 (en) * 2004-01-29 2005-08-23 Seagate Technology Llc Method and apparatus for coded symbol stuffing in recording systems
US20050177605A1 (en) 2004-02-10 2005-08-11 Intel Corporation Computation of logarithmic and exponential functions
DE602004011577T2 (de) * 2004-02-19 2009-01-29 Thomson Licensing Verfahren und vorrichtung zur trägerrückgewinnung in einem kommunikationssystem
US7376689B2 (en) * 2004-03-12 2008-05-20 Infineon Technologies Ag Method and apparatus for reducing the crest factor of a signal
ITMI20040600A1 (it) * 2004-03-26 2004-06-26 Atmel Corp Sistema dsp su chip a doppio processore a virgola mobile nel dominio complesso
US20050281361A1 (en) * 2004-06-16 2005-12-22 Broadcom Corporation Interference cancellation of STBC with multiple streams in OFDM for wlan
KR20060012825A (ko) * 2004-08-04 2006-02-09 삼성전자주식회사 다중입출력 시스템의 수신기
US20060039498A1 (en) * 2004-08-19 2006-02-23 De Figueiredo Rui J P Pre-distorter for orthogonal frequency division multiplexing systems and method of operating the same
US7715656B2 (en) 2004-09-28 2010-05-11 Qualcomm Incorporated Magnification and pinching of two-dimensional images
US7606322B2 (en) * 2004-10-07 2009-10-20 Microelectronics Technology Inc. Digital pre-distortion technique using nonlinear filters
JP4823013B2 (ja) * 2006-10-18 2011-11-24 株式会社日立製作所 ピークファクタ低減装置およびベースバンド信号処理装置
US7801248B2 (en) 2004-11-19 2010-09-21 Qualcomm Incorporated Interference suppression with virtual antennas
US7486738B2 (en) * 2005-02-10 2009-02-03 Samsung Electronics Co., Ltd. Apparatus and method for reducing the crest factor of single carrier or multi-carrier signals
US7477634B1 (en) * 2005-02-10 2009-01-13 Advanced Receiver Technologies, Llc Method and apparatus for a chip-level no-decision feedback equalizer for CDMA wireless systems
US8135088B2 (en) * 2005-03-07 2012-03-13 Q1UALCOMM Incorporated Pilot transmission and channel estimation for a communication system utilizing frequency division multiplexing
US7477330B2 (en) 2005-03-09 2009-01-13 3M Innovative Properties Company Automatic darkening filter with offset polarizers
JP2006279780A (ja) 2005-03-30 2006-10-12 Matsushita Electric Ind Co Ltd 歪み補償装置及び歪み補償方法
US7313373B1 (en) * 2005-04-21 2007-12-25 Xilinx, Inc. Crest factor reduction for use in a multiband transmitter
US7302192B2 (en) * 2005-04-28 2007-11-27 Menara Networks Methods of spread-pulse modulation and nonlinear time domain equalization for fiber optic communication channels
US7415595B2 (en) * 2005-05-24 2008-08-19 Coresonic Ab Data processing without processor core intervention by chain of accelerators selectively coupled by programmable interconnect network and to memory
US7321325B2 (en) * 2005-07-07 2008-01-22 Realtek Semiconductor Corp. Background calibration of continuous-time delta-sigma modulator
US7978799B2 (en) 2005-07-15 2011-07-12 Nec Corporation Adaptive digital filter, FM receiver, signal processing method, and program
CN100502378C (zh) * 2005-07-15 2009-06-17 北京大学深圳研究生院 正交频分复用系统中抑制峰平比的电路和方法
US7613228B2 (en) * 2005-08-10 2009-11-03 Bae Systems Information And Electronic Systems Integration Inc. M-Algorithm multiuser detector with correlation based pruning
US20070060155A1 (en) 2005-08-31 2007-03-15 Emanuel Kahana System and method to dynamically adapt a CCA threshold
US7652532B2 (en) * 2005-09-06 2010-01-26 The Regents Of The University Of California Correlation method for monitoring power amplifier
US7539717B2 (en) * 2005-09-09 2009-05-26 Via Technologies, Inc. Logarithm processing systems and methods
US20070087770A1 (en) * 2005-10-14 2007-04-19 Hong Gan Methods and apparatuses for transmission power control in a wireless communication system
US7746970B2 (en) * 2005-11-15 2010-06-29 Qualcomm Incorporated Method and apparatus for filtering noisy estimates to reduce estimation errors
US7634527B2 (en) 2005-11-17 2009-12-15 International Business Machines Corporation Reciprocal estimate computation methods and apparatus
US7583583B2 (en) 2005-12-15 2009-09-01 Nortel Networks Limited System and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing signals using reserved spectrum
US7602838B2 (en) * 2005-12-22 2009-10-13 Telefonaktiebolaget Lm Ericsson (Publ) Linear turbo equalization using despread values
US7619546B2 (en) * 2006-01-18 2009-11-17 Dolby Laboratories Licensing Corporation Asynchronous sample rate conversion using a digital simulation of an analog filter
US7564912B2 (en) * 2006-02-15 2009-07-21 Mediatek Inc. Method and apparatus for channel state information generation in a DVB-T receiver
CN101411155A (zh) * 2006-03-28 2009-04-15 Nxp股份有限公司 具有延迟失配补偿的发射机
CN1984110B (zh) * 2006-04-24 2011-04-20 华为技术有限公司 降低峰均比的方法和具有低峰均比的正交频分复用系统
US7783260B2 (en) * 2006-04-27 2010-08-24 Crestcom, Inc. Method and apparatus for adaptively controlling signals
US20070286122A1 (en) 2006-06-12 2007-12-13 Motorola, Inc. Clear channel assessment threshold adaptation in a wireless network
CN100594491C (zh) * 2006-07-14 2010-03-17 中国电子科技集团公司第三十八研究所 可重构数字信号处理器
US20080056403A1 (en) * 2006-09-01 2008-03-06 On Demand Microelectronics Method and apparatus for timing recovery of pam signals
US7593492B1 (en) * 2006-09-15 2009-09-22 Bae Systems Information And Electronic Systems Integration Inc. Combinational hybrid turbo-MUD
US7443337B2 (en) 2006-09-25 2008-10-28 Aai Corporation Synthesizing arbitrary waveforms using convolution processors
KR20090080541A (ko) 2006-11-06 2009-07-24 노키아 코포레이션 자기간섭 제거를 위한 아날로그 신호 경로 모델링
US7995975B2 (en) * 2006-12-21 2011-08-09 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for signal peak-to-average ratio reduction
US7504976B1 (en) * 2007-01-31 2009-03-17 Lockheed Martin Corporation Direct radio frequency generation using power digital-to-analog conversion
US7864875B2 (en) 2007-02-02 2011-01-04 Research In Motion Limited Apparatus, and associated method, for communicating a data block in a multi carrier modulation communication scheme together with an identification sequence superimposed thereon
GB0702627D0 (en) 2007-02-09 2007-03-21 Texas Instruments Ltd Transmitter including pre-distortion
US7839951B2 (en) * 2007-04-05 2010-11-23 Microelectronics Technology Inc. Dynamic crest factor reduction system
CA2681362C (en) * 2007-04-25 2014-02-04 Telekom Malaysia Berhad Transceiver front end for software radio systems
US7538704B2 (en) 2007-06-19 2009-05-26 Telefonaktiebolaget Lm Ericsson (Publ) Direct RF D-to-A conversion
FR2918236A1 (fr) * 2007-06-26 2009-01-02 France Telecom Procede et dispositif de generation numerique de frequence.
US8270457B2 (en) * 2007-06-27 2012-09-18 Qualcomm Atheros, Inc. High sensitivity GPS receiver
WO2009004862A1 (ja) * 2007-06-29 2009-01-08 Nec Corporation 送信信号生成装置、方法、およびプログラム
US8369809B2 (en) * 2007-07-27 2013-02-05 Netlogic Microsystems, Inc. Crest factor reduction
US7912883B2 (en) 2007-08-02 2011-03-22 Via Technologies, Inc. Exponent processing systems and methods
JP5010399B2 (ja) * 2007-08-29 2012-08-29 株式会社日立国際電気 直交多重信号のピーク抑圧方法、ピーク抑圧回路、及び送信装置
DE102007053828B4 (de) * 2007-11-12 2009-06-18 Infineon Technologies Ag Übertragung kodierter Daten
US7825724B2 (en) * 2007-12-18 2010-11-02 Motorola Mobility, Inc. Method and apparatus for direct digital to radio frequency conversion
TWI345876B (en) * 2007-12-19 2011-07-21 Sunplus Mmobile Inc Method for calculating coefficients of filter and method for filtering
AU2009215558B2 (en) * 2008-02-19 2014-03-06 Elbit Systems Of America, Llc MIMO Slotted Aloha (MSA) system
US8345793B2 (en) * 2008-03-10 2013-01-01 Telefonaktiebolaget Lm Ericsson (Publ) Compensation of diagonal ISI in OFDM signals
US8229009B2 (en) 2008-04-01 2012-07-24 Harris Corporation System and method for communicating data using efficient fast fourier transform (FFT) for orthogonal frequency division multiplexing (OFDM) modulation
US7990185B2 (en) * 2008-05-12 2011-08-02 Menara Networks Analog finite impulse response filter
WO2010042885A1 (en) * 2008-10-10 2010-04-15 Powerwave Technologies, Inc. Crest factor reduction for ofdm communications systems by transmitting phase shifted resource blocks
US8030997B2 (en) * 2008-11-11 2011-10-04 Philip Brown Resource efficient adaptive digital pre-distortion system
US8260279B2 (en) * 2008-11-15 2012-09-04 Board Of Regents, The University Of Texas System System, method and apparatus for providing communications that conform to a cellular communication standard and a non-cellular communication standard
US9176735B2 (en) * 2008-11-28 2015-11-03 Intel Corporation Digital signal processor having instruction set with one or more non-linear complex functions
US8300749B2 (en) * 2008-12-19 2012-10-30 Alcatel Lucent Method, apparatus and system for frequency synchronization between devices communicating over a packet network
US9207910B2 (en) * 2009-01-30 2015-12-08 Intel Corporation Digital signal processor having instruction set with an xK function using reduced look-up table
US9128790B2 (en) * 2009-01-30 2015-09-08 Intel Corporation Digital signal processor having instruction set with an exponential function using reduced look-up table
TWI597939B (zh) * 2009-02-18 2017-09-01 杜比國際公司 具相位偏移之複數值合成濾波器組
US8351542B2 (en) * 2009-03-30 2013-01-08 Texas Instruments Incorporated Method and system for crest factor reduction
CN102379088B (zh) 2009-03-31 2015-04-29 艾格瑞系统有限责任公司 通过使用△-∑调制器直接合成rf信号的方法和装置
US8300739B2 (en) * 2009-04-21 2012-10-30 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for generating soft bit values in reduced-state equalizers
ATE539491T1 (de) * 2009-05-28 2012-01-15 Univ Duisburg Essen Digitaler empfänger, digitaler sender, verfahren zur bedienung eines digitalen empfängers oder eines digitalen senders und computerprogramm
EP2440356A4 (en) * 2009-06-09 2017-05-24 Lean Tool Systems, LLC Gauge system for workpiece processing
TWI392296B (zh) * 2009-06-15 2013-04-01 Realtek Semiconductor Corp 通訊信號接收器及其訊號處理方法
US8611406B2 (en) * 2009-06-30 2013-12-17 Lsi Corporation System optimization using soft receiver masking technique
US8737636B2 (en) * 2009-07-10 2014-05-27 Qualcomm Incorporated Systems, methods, apparatus, and computer-readable media for adaptive active noise cancellation
DE102010038482B4 (de) * 2009-07-31 2014-07-24 Intel Mobile Communications GmbH Digitale Vorverzerrung und Kompensation einer Betriebsbedingungsauswirkung
US20110055445A1 (en) 2009-09-03 2011-03-03 Azuray Technologies, Inc. Digital Signal Processing Systems
US20110083058A1 (en) * 2009-10-01 2011-04-07 Stmicroelectronics, Inc. Trapping set based ldpc code design and related circuits, systems, and methods
GB2474901B (en) * 2009-10-30 2015-01-07 Advanced Risc Mach Ltd Apparatus and method for performing multiply-accumulate operations
WO2011058843A1 (ja) * 2009-11-10 2011-05-19 日本電気株式会社 増幅装置、歪み補償回路および歪み補償方法
US9276602B1 (en) * 2009-12-16 2016-03-01 Syntropy Systems, Llc Conversion of a discrete-time quantized signal into a continuous-time, continuously variable signal
KR101420898B1 (ko) * 2009-12-23 2014-07-16 한국전자통신연구원 다중 모드 광대역 무선통신 장치 및 방법
EP2362550B1 (en) * 2010-02-18 2012-08-29 Imec Digital front-end circuit and method for using the same
CN102195912B (zh) * 2010-03-16 2015-03-04 富士通株式会社 数字预失真处理设备和方法
US8212942B2 (en) * 2010-04-14 2012-07-03 Newport Media, Inc. All digital front-end architecture for television with sigma-delta ADC input
KR20120037134A (ko) * 2010-10-11 2012-04-19 삼성전자주식회사 이동통신 시스템의 하향링크 수신 장치 및 방법
US8599961B2 (en) * 2010-10-14 2013-12-03 KATREIN-Werke KG Crest factor reduction method and circuit for a multi-carrier signal
US8644428B2 (en) * 2010-10-29 2014-02-04 Texas Instruments Incorporated System and method for channel interpolation
US8630362B1 (en) * 2011-05-02 2014-01-14 Urbain A. von der Embse QLM co-state MAP trellis
US8949302B2 (en) * 2011-06-30 2015-02-03 Silicon Laboratories Inc. Digital front end for oversampled low-IF or zero-IF multimode receivers
US8917705B2 (en) 2011-09-29 2014-12-23 Qualcomm Incorporated Collision reduction mechanisms for wireless communication networks
US9280315B2 (en) 2011-10-27 2016-03-08 Intel Corporation Vector processor having instruction set with vector convolution function for fir filtering
EP3236698A1 (en) 2012-11-02 2017-10-25 Interdigital Patent Holdings, Inc. Power control methods and procedures for wireless local area networks

Also Published As

Publication number Publication date
US8897388B2 (en) 2014-11-25
CN103999078A (zh) 2014-08-20
CN107276936B (zh) 2020-12-11
US20140086361A1 (en) 2014-03-27
US20130117342A1 (en) 2013-05-09
JP6662815B2 (ja) 2020-03-11
CN103975564A (zh) 2014-08-06
KR102001570B1 (ko) 2019-07-18
EP2758896A4 (en) 2015-07-01
WO2013066756A2 (en) 2013-05-10
EP2783492A4 (en) 2015-08-12
KR20140085556A (ko) 2014-07-07
US9280315B2 (en) 2016-03-08
KR102015680B1 (ko) 2019-08-28
US20130114761A1 (en) 2013-05-09
EP2758867A4 (en) 2015-07-08
JP2015504622A (ja) 2015-02-12
EP2772033A4 (en) 2015-07-22
KR20140084292A (ko) 2014-07-04
EP2783492B1 (en) 2020-05-27
KR20140084290A (ko) 2014-07-04
JP2014533017A (ja) 2014-12-08
JP2014532926A (ja) 2014-12-08
JP2014535214A (ja) 2014-12-25
US9529567B2 (en) 2016-12-27
US20140064417A1 (en) 2014-03-06
KR102207599B1 (ko) 2021-01-26
WO2013063447A3 (en) 2013-06-20
EP2772031A4 (en) 2015-07-29
US20140072073A1 (en) 2014-03-13
KR102063140B1 (ko) 2020-02-11
EP2772032A4 (en) 2015-07-01
US8982992B2 (en) 2015-03-17
US9372663B2 (en) 2016-06-21
EP2758867A2 (en) 2014-07-30
WO2013063447A2 (en) 2013-05-02
US20130114652A1 (en) 2013-05-09
JP6037318B2 (ja) 2016-12-07
CN103999416A (zh) 2014-08-20
CN109144570A (zh) 2019-01-04
KR20140092852A (ko) 2014-07-24
US20170293485A1 (en) 2017-10-12
WO2013063443A1 (en) 2013-05-02
CN107276936A (zh) 2017-10-20
US9612794B2 (en) 2017-04-04
US9201628B2 (en) 2015-12-01
CN103988473B (zh) 2017-06-06
EP2772033A2 (en) 2014-09-03
JP6010823B2 (ja) 2016-10-19
US20140086356A1 (en) 2014-03-27
US20160072647A1 (en) 2016-03-10
JP6526415B2 (ja) 2019-06-05
WO2013063450A1 (en) 2013-05-02
US9632750B2 (en) 2017-04-25
EP2783492A1 (en) 2014-10-01
CN103999039B (zh) 2018-08-10
KR20200031084A (ko) 2020-03-23
CN103999078B (zh) 2017-03-22
US20130114762A1 (en) 2013-05-09
US20160365950A1 (en) 2016-12-15
WO2013063440A1 (en) 2013-05-02
CN103999039A (zh) 2014-08-20
EP2772032A1 (en) 2014-09-03
KR20140084294A (ko) 2014-07-04
EP2772031A1 (en) 2014-09-03
US9778902B2 (en) 2017-10-03
US20140108477A1 (en) 2014-04-17
US9292255B2 (en) 2016-03-22
US8831133B2 (en) 2014-09-09
CN103988473A (zh) 2014-08-13
JP2015504261A (ja) 2015-02-05
US20140075162A1 (en) 2014-03-13
CN103999417A (zh) 2014-08-20
US20140086367A1 (en) 2014-03-27
EP2758896A1 (en) 2014-07-30
JP2015502597A (ja) 2015-01-22
JP2017216720A (ja) 2017-12-07
KR20140084295A (ko) 2014-07-04
CN103999417B (zh) 2018-11-13
WO2013063434A1 (en) 2013-05-02
JP6189848B2 (ja) 2017-08-30
WO2013066756A3 (en) 2013-08-15
US10209987B2 (en) 2019-02-19
US9760338B2 (en) 2017-09-12

Similar Documents

Publication Publication Date Title
CN103999416B (zh) 使用最大似然比特流编码的信号的直接数字合成
US8165549B2 (en) Method for notch filtering a digital signal, and corresponding electronic device
Li et al. A 21-GS/s single-bit second-order delta–sigma modulator for FPGAs
CN110574294B (zh) 射频（rf）发射机和减噪装置
Cordeiro et al. Gigasample time-interleaved delta-sigma modulator for FPGA-based all-digital transmitters
CN109660302B (zh) 一种基于数字延时线单元的射频脉宽调制器及调制方法
US20110007836A1 (en) Sample rate conversion in delta-sigma modulators
CN102379088B (zh) 通过使用△-∑调制器直接合成rf信号的方法和装置
CN103346810B (zh) 全数字直接上变频电路
JP2007528151A (ja) 異種のフォーマットを有するデジタル信号のバージョンのための方法およびデバイス、ならびにオーディオ信号のデジタル増幅へのそのような方法およびデバイスの適用
CN111937299A (zh) 噪声消除器和数字发送机
US7026970B2 (en) Method and system for a multi-rate analog finite impulse response filter
Venkataraman et al. An all-digital transmitter with a 1-bit DAC
Huang et al. On design a high speed sigma delta DAC modulator for a digital communication transceiver on chip
US9385837B2 (en) Cascaded viterbi bitstream generator
US10848176B1 (en) Digital delta-sigma modulator with non-recursive computation of residues
O'Brien et al. High order mismatch noise shaping for bandpass DACs
Rahmatollahi et al. A simple pre-filtering for spectral smoothing in a radio frequency digital to analog converter
Venkataraman A practical design methodology for an all-digital transmitter architecture via binary sequence search and a look-up table approach to modulation
Schinkel Data Converter
Li et al. A 21-GS/s Single-Bit Second-Order∆ Σ Modulator for FPGAs

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20161202

Address after: California, USA

Applicant after: INTEL Corp.

Address before: California, USA

Applicant before: LSI Corp.

C14 Grant of patent or utility model
GR01 Patent grant