公开(公告)号：US06392480B1

公开(公告)日：2002-05-21

申请号：US09378009

申请日：1999-08-19

申请人： Reza Ghanadan ,  Robert Evan Myer

发明人： Reza Ghanadan ,  Robert Evan Myer

IPC分类号： H03F126

CPC分类号： H03F1/3235 ,  H03F2201/3212

摘要： A gain and phase control system performs a gain (or phase) adjustment based on the results of a previous gain (or phase) adjustment after an intervening phase (or gain) adjustment. A gain adjustment is based on the results of a previous gain adjustment rather than on the results of an intervening phase adjustment. A phase adjustment is based on the results of a previous phase adjustment rather than the results of an intervening gain adjustment. As such, the above-mentioned increase in error signal does not occur because a gain adjustment is based on the results of the previous gain adjustment, and a phase adjustment is based on the results of the previous phase adjustments. In accordance with another aspect of the present invention, the gain and phase control system makes a gain (or phase) adjustment in parallel with detecting the results from a previous phase (or gain) adjustment, thereby taking advantage of the delay between adjustment and detection of the resulting error signal to improve the convergence rate. For example, the gain and phase control system can perform single alternating gain and phase adjustments and make a gain (or phase) adjustment while detecting the error signal resulting from a preceding phase (or gain) adjustment. When the error signal resulting from the gain (or phase) adjustment is being detected, the gain and phase control system makes a phase (or gain) adjustment using the results detected from the preceding phase (or gain) adjustment.

摘要翻译： 增益和相位控制系统在中间相位（或增益）调整之后基于先前增益（或相位）调整的结果执行增益（或相位）调整。 增益调整基于先前增益调整的结果，而不是中间相位调整的结果。 相位调整基于先前相位调整的结果，而不是中间增益调整的结果。 因此，由于增益调整是基于先前的增益调整的结果而不会发生上述误差信号的增加，并且相位调整基于先前的相位调整的结果。 根据本发明的另一方面，增益和相位控制系统与检测前一相位（或增益）调整的结果并行地进行增益（或相位）调整，从而利用调节和检测之间的延迟 产生的误差信号提高收敛速度。 例如，增益和相位控制系统可以执行单次交变增益和相位调整，并在检测由前一相位（或增益）调整产生的误差信号的同时进行增益（或相位）调整。 当检测到增益（或相位）调整产生的误差信号时，增益和相位控制系统使用从前一相位（或增益）调整检测到的结果进行相位（或增益）调整。

公开(公告)号：US06259319B1

公开(公告)日：2001-07-10

申请号：US09377387

申请日：1999-08-19

申请人： Reza Ghanadan ,  Robert Evan Myer

发明人： Reza Ghanadan ,  Robert Evan Myer

IPC分类号： H03F126

CPC分类号： H03F1/3235

摘要： An adaptive gain and/or phase control system adapts the gain and/or phase adjustment resolution to provide improved performance. For example, the adaptive gain and/or phase control system can dynamically adjust the adjustment resolution for gain and/or phase adjustments as a function of the error signal(s). In response to a large error signal(s) (far from the null), the adaptive gain/or phase control system decreases the adjustment resolution, resulting in a faster convergence rate. In a feed forward distortion reduction system, decreasing the adjustment resolution improves the transient response of the amplifier (for example, given any set of operating conditions, how quickly the amplifier responds to a changing input). As phase or gain adjustments are made to approach the null, the error signal reduces, and the adaptive distortion reduction system increases the adjustment resolution. By increasing the adjustment resolution as the error signal approaches the null, finer phase or gain adjustments can be made which further reduce the error signal. For example, in a feed forward distortion reduction system, such a scheme prevents the error signal from repeatedly jumping over the null due to limited resolution without sacrificing the transient response of the amplifier.

摘要翻译： 自适应增益和/或相位控制系统适应增益和/或相位调整分辨率以提供改进的性能。 例如，自适应增益和/或相位控制系统可以根据误差信号动态地调节用于增益和/或相位调整的调整分辨率。 响应于大的误差信号（远离零点），自适应增益或相位控制系统降低了调整分辨率，导致更快的收敛速度。 在前馈失真减小系统中，降低调整分辨率可以改善放大器的瞬态响应（例如，给定任何一组工作条件，放大器对变化的输入的响应速度）。 当进行相位或增益调整以接近零时，误差信号减小，自适应失真降低系统增加调整分辨率。 通过随着误差信号接近零而增加调整分辨率，可以进行更精细的相位或增益调整，进一步减小误差信号。 例如，在前馈失真减小系统中，这种方案防止误差信号由于有限的分辨率而重复地跳过零点而不会牺牲放大器的瞬态响应。

公开(公告)号：US5847603A

公开(公告)日：1998-12-08

申请号：US903931

申请日：1997-07-31

申请人： Robert Evan Myer

发明人： Robert Evan Myer

IPC分类号： H03F1/32 ,  H03F3/66 ,  H03F1/26

CPC分类号： H03F1/3235 ,  H03F2201/3212

摘要： An automatic control system for reducing distortion produced by electrical circuit where a pilot signal pulse is applied to the electrical circuit for a period of time during which the system determines the adjustments to be made to its circuitry to reduce the distortion.

摘要翻译： 一种用于减少由电路产生的失真的自动控制系统，其中导频信号脉冲施加到电路一段时间，在此期间系统确定要对其电路进行调整以减小失真。

公开(公告)号：US5835848A

公开(公告)日：1998-11-10

申请号：US774546

申请日：1996-12-30

申请人： Qi Bi ,  Robert Evan Myer

发明人： Qi Bi ,  Robert Evan Myer

IPC分类号： H04B7/01 ,  H04B7/15 ,  H04B7/155 ,  H04B7/26 ,  H04B7/14

CPC分类号： H04B7/15578 ,  H04B1/525

摘要： The invention is a repeater for a telecommunications transmission system such as a CDMA wireless system. The repeater reduces leakage by using a feedback signal whose amplitude and phase are adjusted in response to the amplitude and phase of a sampled input signal when a switch turns off the normal output of the repeater for a short period of time. In one embodiment, a pilot signal is transmitted during this time period so that the sampled input is the leakage signal. In another embodiment, the sampled input is the normal transmission signal received during the time period.

摘要翻译： 本发明是用于诸如CDMA无线系统的电信传输系统的中继器。 中继器通过使用反馈信号来减少泄漏，该反馈信号的幅度和相位根据采样的输入信号的幅度和相位被调整，当开关在短时间内关断中继器的正常输出时。 在一个实施例中，在该时间段期间发送导频信号，使得采样的输入是泄漏信号。 在另一个实施例中，采样输入是在该时间段期间接收的正常发送信号。

公开(公告)号：US5745846A

公开(公告)日：1998-04-28

申请号：US512003

申请日：1995-08-07

申请人： Robert Evan Myer ,  Jack Chi-Chieh Wen

发明人： Robert Evan Myer ,  Jack Chi-Chieh Wen

IPC分类号： H04J1/00 ,  H03G9/00 ,  H04B1/28 ,  H04B1/16

CPC分类号： H04B1/28 ,  H03G3/3042

摘要： Disclosed is a channelized multi-carrier signal processor capable of equalizing power levels of individual carriers of a multi-carrier signal to within a predetermined dynamic range. In one embodiment, the signal processor includes a power splitter for splitting a multi-carrier input signal into a plurality of electrical paths. In each electrical path there resides a signal modifier that is operable to isolate signal energy associated with a given carrier of the multi-carrier signal. Each signal modifier includes an automatic gain control (AGC) circuit to control the power level of the carrier isolated therein to within a predetermined power level window so that the isolated carriers of each signal modifier are equalized in power. A power combiner then combines the equalized carriers to produce a multi-carrier output signal, which can be applied to a limited dynamic range device such as an A/D converter. Preferably, the carriers are isolated with the use of a tunable frequency synthesizer and a down-converting mixer within each signal modifier. This arrangement provides flexibility as to the frequencies which can be used for the modulated carriers of the multi-carrier input signal.

摘要翻译： 公开了一种信道化多载波信号处理器，其能够将多载波信号的各个载波的功率电平均衡到预定动态范围内。 在一个实施例中，信号处理器包括功率分配器，用于将多载波输入信号分离成多个电路径。 在每个电路中，存在信号调节器，其可操作以隔离与多载波信号的给定载波相关联的信号能量。 每个信号修正器包括一个自动增益控制（AGC）电路，用于控制在预定功率电平窗内隔离的载波的功率电平，使得每个信号修正器的隔离载波在功率上均衡。 功率组合器然后组合均衡载波以产生多载波输出信号，其可以应用于诸如A / D转换器的有限动态范围装置。 优选地，使用可调频率合成器和每个信号调节器内的下变频混频器隔离载波。 这种布置提供了可用于多载波输入信号的调制载波的频率的灵活性。

公开(公告)号：US6127889A

公开(公告)日：2000-10-03

申请号：US195754

申请日：1998-11-18

申请人： Robert Evan Myer

发明人： Robert Evan Myer

IPC分类号： H03F1/32 ,  H03F1/26

CPC分类号： H03F1/3235

摘要： A nested feed forward distortion reduction system, which reduces the distortion from a main amplifier on a main signal path, uses a nested feed forward arrangement for the correction amplifier to reduce the distortion produced from the correction amplifier. In reducing the distortion from the correction amplifier(s) and using progressively higher quality correction amplifier(s), the nested feed forward arrangement produces an improved, more stable representation of the distortion from the main amplifier, thereby alleviating the need for variable gain and/or phase control in producing amplified signal with reduced distortion.

摘要翻译： 一种降低主信号路径上的主放大器的失真的嵌套前馈失真减少系统使用用于校正放大器的嵌套前馈布置来减少由校正放大器产生的失真。 在减少来自校正放大器的失真并且使用逐渐更高质量的校正放大器的情况下，嵌套的前馈布置从主放大器产生失真的改进的，更稳定的表示，从而减轻对可变增益的需要， /或产生放大信号的相位控制，具有减小的失真。

公开(公告)号：US5994957A

公开(公告)日：1999-11-30

申请号：US994830

申请日：1997-12-19

申请人： Robert Evan Myer

发明人： Robert Evan Myer

IPC分类号： H03F1/32

CPC分类号： H03F1/3229 ,  H03F1/3241

摘要： The present invention is a feed forward circuit and method for reducing distortion added to an output signal of the feed forward by its amplifiers without increasing the time delay in the main circuit path of the feed forward circuit. This is accomplished using a pre-distortion circuit to introduce a pre-distortion signal to the input signal of a correction amplifier. The pre-distortion signal is being used to cancel a distortion signal that will be introduced by the correction amplifier. The pre-distortion signal has approximately the same frequency and amplitude as the distortion signal. The pre-distortion signal, however, has a phase difference of approximately 180.degree. with respect to the distortion signal such that the pre-distortion signal and the distortion signal cancel each other when combined.

摘要翻译： 本发明是一种用于在不增加前馈电路的主电路路径中的时间延迟的情况下减小由放大器向前馈的输出信号增加的失真的前馈电路和方法。 这是使用预失真电路来实现的，以将预失真信号引入校正放大器的输入信号。 预失真信号用于消除由校正放大器引入的失真信号。 预失真信号具有与失真信号大致相同的频率和振幅。 然而，预失真信号相对于失真信号具有大约180°的相位差，使得当组合时，预失真信号和失真信号彼此抵消。

公开(公告)号：US5986499A

公开(公告)日：1999-11-16

申请号：US217637

申请日：1998-12-21

申请人： Robert Evan Myer

发明人： Robert Evan Myer

IPC分类号： H03F1/32 ,  H03F3/66 ,  H03F1/00

CPC分类号： H03F1/3229

摘要： A pilot signal detection system uses a band reject filter to reject the frequency band of at least one carrier signal to improve pilot signal detection. For example, in a feed forward distortion reduction system, the carrier signal(s) is on a main signal path along with a pilot signal which is injected into the main signal path at a frequency adjacent to the frequency band of the carrier signal(s). The carrier signal(s) and the pilot signal are amplified on the main signal path, resulting in distortion on the main signal path. To reduce the distortion from the main signal path, the feed forward distortion reduction system detects and reduces the pilot signal. To improve detection of the pilot signal, the pilot signal detection system provides a signal representative of the carrier signal(s) and the pilot signal with distortion from the main signal path onto a pilot detection path. A band reject filter on the pilot detection path rejects the frequency band of the carrier signal(s) while allowing the frequency of the pilot signal to pass through to pilot detect circuitry. Without the presence of the carrier signal(s), the pilot detect circuitry can more accurately detect the pilot signal on the pilot detection path. In response to the detected pilot signal, the pilot detect circuitry can provide control signal(s) to improve the reduction of the pilot signal by changing the relative phase and/or gain between the signals on the main signal path and the feed forward path. Thus, by improving the detection of the pilot signal, the pilot detection system improves the reduction of the pilot signal and thereby of the distortion.

摘要翻译： 导频信号检测系统使用带阻滤波器来拒绝至少一个载波信号的频带，以改善导频信号检测。 例如，在前馈失真减小系统中，载波信号与导频信号一起在主信号路径上，该导频信号以与载波信号的频带相邻的频率被注入主信号路径 ）。 载波信号和导频信号在主信号路径上放大，导致主信号路径失真。 为了减少主信号路径的失真，前馈失真减少系统检测并降低导频信号。 为了提高导频信号的检测，导频信号检测系统提供表示载波信号和导频信号的信号，该信号具有从主信号路径到导频检测路径的失真。 导频检测路径上的带阻滤波器拒绝载波信号的频带，同时允许导频信号的频率通过导频检测电路。 在没有载波信号的情况下，导频检测电路可以更精确地检测导频检测路径上的导频信号。 响应于检测到的导频信号，导频检测电路可以通过改变主信号路径和前馈路径上的信号之间的相对相位和/或增益来提供控制信号以改善导频信号的减小。 因此，通过改善导频信号的检测，导频检测系统改善导频信号的减少，从而改善失真。

公开(公告)号：US5694036A

公开(公告)日：1997-12-02

申请号：US512005

申请日：1995-08-07

申请人： Robert Evan Myer

发明人： Robert Evan Myer

IPC分类号： G06F11/22 ,  G01R29/02 ,  H03L7/085 ,  G01R1/30

CPC分类号： G01R29/02

摘要： A direction sensor is provided in an automatic control circuit which is incorporated into a distortion reduction circuit. The direction sensor is comprised of a test switch, first and second storage devices, a comparison device, a normalization device and a sampling control device. The direction sensor conducts a series of consecutive test cycles, comprised of even numbered test cycles and odd numbered test cycles, and during each test cycle a sample of the test signal is taken. During the even numbered test cycles the sampling control device causes the test switch to transfer an even numbered sample of the test signal to the first storage device and thereafter to the first input of the comparison device, where the even numbered sample is compared with an earlier in time odd numbered sample at the second input of the comparison device. The comparison device produces a first comparison signal indicative of the relative value of the samples. During odd numbered test cycles, the sampling control device is adapted to cause the test switch to transfer an odd numbered sample of the test signal to the second storage device and thereafter to the second input of the comparison device, where the odd numbered sample is compared with an earlier in time even numbered sample at the first input of the comparison device. The comparison device produces a second comparison signal indicative of the relative value of the samples. A normalization signal from the sampling control device and the comparison signal from the comparison device are combined to produce a direction signal.

摘要翻译： 在自动控制电路中设置方向传感器，该自动控制电路并入失真减少电路中。 方向传感器由测试开关，第一和第二存储设备，比较设备，归一化设备和采样控制设备组成。 方向传感器进行一系列连续的测试周期，包括偶数测试周期和奇数测试周期，并且在每个测试周期期间，采集测试信号的采样。 在偶数测试周期期间，采样控制装置使得测试开关将测试信号的偶数样本传送到第一存储设备，然后传送到比较设备的第一输入，其中偶数样本与较早的 在比较装置的第二输入处的奇数样本。 比较装置产生指示样品的相对值的第一比较信号。 在奇数编号的测试周期中，采样控制装置适于使测试开关将测试信号的奇数样本传送到第二存储装置，然后传送到比较装置的第二输入，其中比较奇数样本 在比较设备的第一个输入处，较早的时间偶数编号的样本。 比较装置产生指示样品的相对值的第二比较信号。 来自采样控制装置的归一化信号和来自比较装置的比较信号被组合以产生方向信号。

公开(公告)号：US06363120B1

公开(公告)日：2002-03-26

申请号：US09098784

申请日：1998-06-17

申请人： Robert Evan Myer ,  Mohan Patel ,  Jack Chi-Chieh Wen

发明人： Robert Evan Myer ,  Mohan Patel ,  Jack Chi-Chieh Wen

IPC分类号： H03B1404

CPC分类号： H03F1/3229 ,  H03D7/165

摘要： A frequency mixing system provides an expanded dynamic range when compared to the dynamic range(s) of an individual mixer(s) that make up the arrangement. The frequency mixing system uses a feed-forward arrangement to reduce the distortion emanating from a single mixer due to a signal power level which would result in a frequency converted signal outside the dynamic range of the mixer. For example, the frequency mixing system splits an input signal onto a first path and a second path. On the first path, a first mixer frequency mixes the signal to produce a frequency converted signal with distortion, such as intermodulation distortion. On the second path, the amplitude of the signal is attenuated then frequency mixed by a second mixer to produce a frequency converted signal with a low and/or insignificant level of distortion. The first mixer element produces a frequency converted signal with distortion because the signal on the first path enters the first mixer at a power level resulting in a frequency converted signal outside the dynamic range of the first mixer. As such, the higher power level of the signal into the first mixer creates distortion that emanates from the first mixer along with the frequency converted signal. Since the attenuated signal on the second path enters the second mixer at a lower power level resulting in a frequency converted signal within the dynamic range of the second mixer, the second mixer produces the frequency converted signal with the low and/or insignificant level of distortion. After the signals on the first and second paths are frequency converted, the frequency converted signal and distortion are coupled from the first path and combined with the frequency converted signal on the second path, producing the distortion as the prominent signal on the second path. The distortion on the second path is then combined with the frequency converted signal and distortion on the first path to cancel the distortion on the first path and produce the desired frequency converted signal with reduced distortion as compared to the distortion produced if the original input signal would be frequency converted using only the first mixer.