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1. 发明申请

WO2002089336A3 ANALOGUE AND DIGITAL SIGNAL PROCESSING 审中-公开
公开(公告)号：WO2002089336A3
公开(公告)日：2002-11-07
申请号：PCT/GB2002/001974
申请日：2002-04-30
申请人： ANDREW CORPORATION , KENINGTON, Peter , COPE, Mark , KNIGHTS, Philip , FARQUHAR, Graham
发明人： KENINGTON, Peter , COPE, Mark , KNIGHTS, Philip , FARQUHAR, Graham
IPC分类号： H03D7/16
摘要： A power amplifier (PA) in linearised by predistorting its input signal using a digital card. The output of the digital card is upconverted to RF and supplied to the amplifier. In order to be predistorted, the amplifier input signal is downconverted if it is provided at RF. The local oscillator signals used in the frequency conversion of the amplifier input signal and the clock signals used in the digital card are derived from the same master oscillator so that they are coherent. This coherency is beneficial in that, for example, it reduces the number and spread of spurious mixing products created in the frequency conversion process(es).

2. 发明申请

WO2002089336A2 ANALOGUE AND DIGITAL SIGNAL PROCESSING 审中-公开
标题翻译：模拟和数字信号处理
公开(公告)号：WO2002089336A2
公开(公告)日：2002-11-07
申请号：PCT/GB2002/001974
申请日：2002-04-30
申请人： WIRELESS SYSTEMS INTERNATIONAL LIMITED , KENINGTON, Peter , COPE, Mark , KNIGHTS, Philip , FARQUHAR, Graham
发明人： KENINGTON, Peter , COPE, Mark , KNIGHTS, Philip , FARQUHAR, Graham
IPC分类号： H04B
CPC分类号： H03F1/3247 , H03F1/3241 , H04B1/0475 , H04B1/28 , H04B2001/0425
摘要： A power amplifier (PA) in linearised by predistorting its input signal using a digital card. The output of the digital card is upconverted to RF and supplied to the amplifier. In order to be predistorted, the amplifier input signal is downconverted if it is provided at RF. The local oscillator signals used in the frequency conversion of the amplifier input signal and the clock signals used in the digital card are derived from the same master oscillator so that they are coherent. This coherency is beneficial in that, for example, it reduces the number and spread of spurious mixing products created in the frequency conversion process(es).
摘要翻译：功率放大器（PA），通过使用数字卡预失真其输入信号进行线性化。数字卡的输出上变频到RF并提供给放大器。为了进行预失真，放大器输入信号如果在RF处被提供则被下变频。在放大器输入信号的频率转换中使用的本地振荡器信号和数字卡中使用的时钟信号来自相同的主振荡器，使得它们是相干的。这种一致性是有益的，因为例如，它减少了在变频过程中产生的混合产物的数量和扩展。

3. 发明申请

WO2002103892A3 METHODS AND APPARATUS FOR SIGNAL DISTORTION CORRECTION 审中-公开
公开(公告)号：WO2002103892A3
公开(公告)日：2002-12-27
申请号：PCT/GB2002/002767
申请日：2002-06-12
申请人： ANDREW CORPORATION , COPE, Mark , KENINGTON, Peter , MEADE, Steven, Anthony
发明人： COPE, Mark , KENINGTON, Peter , MEADE, Steven, Anthony
IPC分类号： H03F1/32
摘要： The digital predistorter multiplies the input signal with coefficients obtained from look-up tables. To reduce the amount of storage required, the coefficients are stored in partial form and are either reconstituted by addition of a constant (44) prior to application to the input signal or the retrieved coefficients are applied directly to the input signal and the resulting modified signal is then combined with the original input signal (34).

4. 发明申请

WO2002103892A2 METHODS AND APPARATUS FOR SIGNAL DISTORTION CORRECTION 审中-公开
标题翻译：信号失真校正的方法和装置
公开(公告)号：WO2002103892A2
公开(公告)日：2002-12-27
申请号：PCT/GB2002/002767
申请日：2002-06-12
申请人： WIRELESS SYSTEMS INTERNATIONAL LIMITED , COPE, Mark , KENINGTON, Peter , MEADE, Steven, Anthony
发明人： COPE, Mark , KENINGTON, Peter , MEADE, Steven, Anthony
IPC分类号： H03F1/00
CPC分类号： H03F1/3247 , H03F1/3294 , H03F2201/3224
摘要： The digital predistorter multiplies the input signal with coefficients obtained from look-up tables. To reduce the amount of storage required, the coefficients are stored in partial form and are either reconstituted by addition of a constant (44, Figure 3b) prior to application to the input signal or the retrieved coefficients are applied directly to the input signal and the resulting modified signal is then combined with the original input signal (34, Figure 2a).
摘要翻译：数字预失真器将输入信号与从查找表获得的系数相乘。为了减少所需的存储量，系数以部分形式存储，并且在应用于输入信号之前通过添加常数（44，图3b）来重构，或者将检索到的系数直接应用于输入信号，并且然后将所产生的经修改的信号与原始输入信号（图2a中的34）组合。

5. 发明申请

WO2002089313A2 FREQUENCY CONVERSION OF SIGNALS 审中-公开
标题翻译：信号频率转换
公开(公告)号：WO2002089313A2
公开(公告)日：2002-11-07
申请号：PCT/GB2002/001973
申请日：2002-04-30
申请人： WIRELESS SYSTEMS INTERNATIONAL LIMITED , KENINGTON, Peter , COPE, Mark , MEADE, Steven , ROBERTSON, Mark
发明人： KENINGTON, Peter , COPE, Mark , MEADE, Steven , ROBERTSON, Mark
IPC分类号： H03D7/00
CPC分类号： H03D7/161
摘要： When using a DSP to digitally predistort the RF input to a power amplifier, it is necessary to downconvert the frequency the of the input signal to enable it to be processed by the DSP. The predistored amplifier input signal produced by the DSP is then upconverted to its original frequency and supplied to the power amplifier. The downconverter and the upconverter processes each comprise a number of mixers that operate in series upon the amplifier input signal. Each of the mixers mixes a respective reference signal into the amplifier input signal to change the latter's frequency. All of the reference signals are derived from the same reference oscillator. If the total number of mixers that perform high-sided mixing is constrained to be even, then frequency errors associated with the downconversion and subsequent upconversion are eliminated.
摘要翻译：当使用DSP对功率放大器的RF输入进行数字预失真时，需要对输入信号的频率进行下变频，以使其能够被DSP处理。然后由DSP产生的预先放大的输入信号上变频到其原始频率并提供给功率放大器。下变频器和上变频器过程各自包括多个混合器，其在放大器输入信号上串联操作。每个混频器将相应的参考信号混合到放大器输入信号中以改变其频率。所有的参考信号都是从相同的参考振荡器得到的。如果执行高侧混合的混合器的总数被限制为均匀，则与下转换和随后的上转换相关的频率误差被消除。

6. 发明申请

WO2006052377A2 SYSTEM AND METHOD FOR FORWARD PATH GAIN CONTROL IN A DIGITAL PREDISTORTION LINEARIZED TRANSMITTER 审中-公开
标题翻译：数字预测线性发射机前进路径增益控制系统及方法
公开(公告)号：WO2006052377A2
公开(公告)日：2006-05-18
申请号：PCT/US2005/036735
申请日：2005-10-12
申请人： POWERWAVE TECHNOLOGIES, INC. , LUKE, Christian, G. , JOHNSON, Ian , COPE, Mark , MANSELL, Adrian , WOOD, Steven, A.
发明人： LUKE, Christian, G. , JOHNSON, Ian , COPE, Mark , MANSELL, Adrian , WOOD, Steven, A.
IPC分类号： H04L25/49
CPC分类号： H04L27/3809
摘要： A system and method for controlling the gain in the forward signal path (102) of a digital predistortion linearizer is disclosed. The loop gain of the predistortion system is driven to unity, where a separately controlled constant-gain observation path (104) allows accurate gain control of the forward path (102). This is divided into digital gain from the predistortion function and analog gain from a Voltage Variable Attenuator (WA) (130) in the transmitter. The invention balances the distribution between these two domains in order to maximize dynamic range and minimize noise in the forward signal path (102). In order to distribute the forward path gain accurately, the characteristic of the WA (130) must be well known. Since these devices tend to be non-linear, with variable characteristic over temperature and batch, the invention compensates for this non-linear behavior by tracking the varying transfer characteristic of the WA (130), giving a predictable local characteristic. Another aspect of the disclosed invention is the ability to operate with very low transmit power and loop gain levels, allowing accurate gain control during such scenarios as cell initialization, that require operation over a wide dynamic range.
摘要翻译：公开了一种用于控制数字预失真线性化电路的正向信号路径（102）中的增益的系统和方法。预失真系统的环路增益被驱动为单位，其中单独控制的恒定增益观测路径（104）允许正向路径（102）的精确增益控制。这将分配为来自预失真功能的数字增益和发射机中的电压可变衰减器（WA）（130）的模拟增益。本发明平衡了这两个域之间的分布，以便最大化动态范围并最小化正向信号路径（102）中的噪声。为了准确地分配正向路径增益，WA（130）的特性必须是众所周知的。由于这些装置倾向于非线性，具有温度和批次可变特性，本发明通过跟踪WA（130）的变化传递特性来补偿该非线性行为，从而给出可预测的局部特性。所公开的发明的另一方面是以非常低的发射功率和环路增益水平进行操作的能力，从而允许在需要在宽动态范围上操作的诸如小区初始化的情况下的精确增益控制。

7. 发明申请

WO2006017126A1 SYSTEM AND METHOD FOR DIGITAL TIMING ERROR CORRECTION IN A COMMUNICATIONS SYSTEM UTILIZING ADAPTIVE PREDISTORTION 审中-公开
标题翻译：一种利用自适应预测的通信系统中数字时序误差校正的系统与方法
公开(公告)号：WO2006017126A1
公开(公告)日：2006-02-16
申请号：PCT/US2005/024132
申请日：2005-07-08
申请人： POWERWAVE TECHNOLOGIES, INC. , WOOD, Steven, A. , JOHNSON, Ian , LUKE, Christian, G. , MANSELL, Adian , COPE, Mark
发明人： WOOD, Steven, A. , JOHNSON, Ian , LUKE, Christian, G. , MANSELL, Adian , COPE, Mark
IPC分类号： H04K1/02
CPC分类号： H04L7/007 , H03F1/3241 , H04L7/0029 , H04L7/0062
摘要： A system and method for rapidly correcting the time difference between two signals is disclosed. In particular, a system and method for very rapidly correcting timing errors to the very high degree of accuracy required for digital predistortion adaptation is disclosed. The method is a signal processing technique, which can be performed in either hardware or software, which employs a correlation computation. The correlation results are processed in a manner that enables very rapid and accurate estimation of the time difference between the two signals.
摘要翻译：公开了一种用于快速校正两个信号之间的时间差的系统和方法。特别地，公开了一种用于非常快速地校正定时误差的数字预失真适应所需的非常高的准确度的系统和方法。该方法是信号处理技术，其可以在采用相关计算的硬件或软件中执行。相关结果以能够非常快速且准确地估计两个信号之间的时间差的方式进行处理。

8. 发明申请

WO2002103891A2 CONTROL SCHEME FOR SIGNAL PROCESSING ARRANGEMENT 审中-公开
标题翻译：信号处理装置的控制方案
公开(公告)号：WO2002103891A2
公开(公告)日：2002-12-27
申请号：PCT/GB2002/002661
申请日：2002-06-12
申请人： WIRELESS SYSTEMS INTERNATIONAL LIMITED , BISHOP, John , SMITHSON, Antony, James , MEADE, Steven, Anthony , COPE, Mark
发明人： BISHOP, John , SMITHSON, Antony, James , MEADE, Steven, Anthony , COPE, Mark
IPC分类号： H03F1/00
CPC分类号： H03F1/3294 , H03F1/3223 , H03F1/3247
摘要： The control scheme uses the input and output signals of an amplifier (10) to control a lineariser (24) operating on the amplifier (10). The input and output signals are sensed and used to develop assay signals that have ideal inter-relationships when the amplifier is operating as desired. The control scheme modifies the operation of the lineariser to account for any departures observed in the relationships.
摘要翻译：控制方案使用放大器（10）的输入和输出信号来控制在放大器（10）上操作的线性化器（24）。当放大器根据需要进行操作时，感测输入和输出信号并用于开发具有理想相互关系的测定信号。控制方案修改了线性关系器的操作，以解释在关系中观察到的任何偏差。

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