Low power digital receiver
    11.
    发明授权
    Low power digital receiver 失效
    低功率数字接收机

    公开(公告)号:US4910752A

    公开(公告)日:1990-03-20

    申请号:US161950

    申请日:1988-02-29

    IPC分类号: H03J5/02 H04B1/16

    摘要: A low power digital receiver (10) is provided that contemporaneously selects the lowest possible sampling signal frequency (34) (from a plurality of available sampling signals), and received signal level (28) to properly digitize (32) and recover a desired signal. Digitization is performed after the first IF using broadband stages (28, 30, and 32) that are temporarily enabled (44) to rapidly digitize the first IF signal. This, together with the low sampling rate, minimizes the power consumption of the receiver (10) thereby permitting portable and mobile digital receiver embodiments.

    摘要翻译: 提供了同时选择最低可能采样信号频率(34)(从多个可用采样信号)和接收信号电平(28)适当数字化(32)并恢复期望信号的低功率数字接收机(10) 。 在第一IF使用临时使能宽带级(28,30和32)(44)以快速数字化第一IF信号之后进行数字化。 这与低采样率一起使接收机(10)的功耗最小化,从而允许便携式和移动数字接收机实施例。

    Integrated multi-mode bandpass sigma-delta receiver subsystem with
interference mitigation and method of using the same
    12.
    发明授权
    Integrated multi-mode bandpass sigma-delta receiver subsystem with interference mitigation and method of using the same 有权
    具有干扰抑制的集成多模带通Σ-Δ接收机子系统及其使用方法

    公开(公告)号:US6160859A

    公开(公告)日:2000-12-12

    申请号:US174628

    申请日:1998-10-19

    IPC分类号: H04B1/00 H04B1/28 H04L27/08

    CPC分类号: H04B1/005 H04B1/00 H04B1/28

    摘要: An integrated multi-mode bandpass sigma-delta radio frequency receiver subsystem with interference mitigation includes a first intermediate frequency amplifier. At least one mixer for mixing the output of the first amplifier and an oscillator signal. A second IF amplifier for amplifying and filtering the output of the at least one mixer. A multi mode multi bandwidth sigma delta analog digital converter for providing digital output signals with high dynamic range. A digital mixer providing I and Q signals a decimation network providing I and Q signals at reduced programmable data and clock frequencies and a formatting network for arranging the I and Q signals into a predetermined format for use with a digital signal processor.

    摘要翻译: 具有干扰抑制的集成多模式带通Σ-Δ射频接收器子系统包括第一中频放大器。 用于混合第一放大器的输出和振荡器信号的至少一个混频器。 用于放大和滤波至少一个混频器的输出的第二IF放大器。 一种多模式多带宽Σ-Δ模拟数字转换器,用于提供高动态范围的数字输出信号。 提供I和Q的数字混合器发信号通过减少的可编程数据和时钟频率提供I和Q信号的抽取网络和用于将I和Q信号布置成用于数字信号处理器的预定格式的格式化网络。

    Method and apparatus for enhancing an operating characteristic of a
radio transmitter
    14.
    发明授权
    Method and apparatus for enhancing an operating characteristic of a radio transmitter 失效
    用于增强无线电发射机的操作特性的方法和装置

    公开(公告)号:US5564086A

    公开(公告)日:1996-10-08

    申请号:US158551

    申请日:1993-11-29

    IPC分类号: H04B1/04

    CPC分类号: H04B1/0458

    摘要: In a radio transmitter (100) that includes a power amplifier (104) and an antenna (106), a method for enhancing an operating characteristic of the radio transmitter (100) can be accomplished in the following manner. The power amplifier (104) provides a signal (113) to a variable matching network (111), wherein the signal (113) comprises energy to be radiated by the antenna (106). The variable matching network (111) couples the signal (113) to a sampler (112) that is operably coupled to an output of the variable matching network (111 ) and the antenna (106). The sampler (112) samples a forward component (114) and a reflected component (115) of the signal (113). The radio transmitter (100) processes the sampled forward and reflected components (116, 118) to produce a feedback control signal (120). The feedback control signal (120) is used to adjust the variable matching network (111 ), such that an operating characteristic of the radio transmitter (100) is enhanced.

    摘要翻译: 在包括功率放大器(104)和天线(106)的无线电发射机(100)中,可以以下列方式实现增强无线电发射机(100)的工作特性的方法。 功率放大器(104)向可变匹配网络(111)提供信号(113),其中信号(113)包括由天线(106)辐射的能量。 可变匹配网络(111)将信号(113)耦合到可操作地耦合到可变匹配网络(111)和天线(106)的输出的采样器(112)。 采样器(112)对信号(113)的正向分量(114)和反射分量(115)进行采样。 无线电发射机(100)处理采样的正向和反射分量(116,118)以产生反馈控制信号(120)。 反馈控制信号(120)用于调整可变匹配网络(111),使得无线电发射机(100)的工作特性得到增强。

    Low power digital receiver
    15.
    发明授权
    Low power digital receiver 失效
    低功率数字接收机

    公开(公告)号:US4811362A

    公开(公告)日:1989-03-07

    申请号:US62816

    申请日:1987-06-15

    IPC分类号: H03J5/02 H04B1/16 H04L27/06

    摘要: A low power digital receiver (10) is provided that contemporaneously selects the lowest possible sampling signal frequency (34) (from a plurality of available sampling signals), and received signal level (28) to properly digitize (32) and recover a desired signal. Digitization is performed after the first IF using broadband stages (28, 30, and 32) that are temporarily enabled (44) to rapidly digitize the first IF signal. This, together with the low sampling rate, minimizes the power consumption of the receiver (10) thereby permitting portable and mobile digital receiver embodiments.

    摘要翻译: 提供了同时选择最低可能采样信号频率(34)(从多个可用采样信号)和接收信号电平(28)适当数字化(32)并恢复期望信号的低功率数字接收机(10) 。 在第一IF使用临时使能宽带级(28,30和32)(44)以快速数字化第一IF信号之后进行数字化。 这与低采样率一起使接收机(10)的功耗最小化,从而允许便携式和移动数字接收机实施例。

    Method and apparatus for linear amplification of a radio frequency signal
    16.
    发明授权
    Method and apparatus for linear amplification of a radio frequency signal 有权
    用于线性放大射频信号的方法和装置

    公开(公告)号:US06449465B1

    公开(公告)日:2002-09-10

    申请号:US09468025

    申请日:1999-12-20

    IPC分类号: H01Q1112

    摘要: A method and apparatus is provided that amplitude modulates a modulated radio frequency (RF) signal (411) by modulating the supply voltage of a power amplifier (410). The method and apparatus further provides an impedance modulator (412) that reduces output signal (415) errors in response to an error signal generated by a feedback circuit (416) that includes a quadrature modulator (506), a limiter (520), a comparator (502), and a quadrature downconverter (510). Intermodulation distortion generated in the feedback circuit (416) by delay mismatches between amplitude and phase feedback paths, and non-linear effects of AM/PM conversion in a limiter (520), are suppressed by placing limiter (520) and quadrature downconverter (510) in a forward path of the overall amplifier loop.

    摘要翻译: 提供了一种通过调制功率放大器(410)的电源电压来对调制的射频(RF)信号(411)进行幅度调制的方法和装置。 该方法和装置还提供了一种阻抗调制器(412),其响应由包括正交调制器(506),限幅器(520),反馈电路(406),反馈电路 比较器(502)和正交下变频器(510)。 通过放大限幅器(520)和正交下变频器(510)来抑制在反馈电路(416)中通过幅度和相位反馈路径之间的延迟失配以及限幅器(520)中的AM / PM转换的非线性效应产生的互调失真 )在整个放大器环路的正向通路中。

    Integrated multi-mode bandpass sigma-delta receiver subsystem with interference mitigation and method of using same
    17.
    发明授权
    Integrated multi-mode bandpass sigma-delta receiver subsystem with interference mitigation and method of using same 有权
    具有干扰抑制的集成多模带通Σ-Δ接收机子系统及其使用方法

    公开(公告)号:US06356603B1

    公开(公告)日:2002-03-12

    申请号:US09642491

    申请日:2000-08-18

    IPC分类号: H04L2708

    CPC分类号: H04B1/005 H04B1/00 H04B1/28

    摘要: An integrated sigma-delta radio frequency (RF) receiver subsystem (200) and method utilizes a multi-mode sigma-delta analog-to-digital converter (215) for providing a single and multi-bit output. A programmable decimation network (221) for reducing the frequency of the in-phase and quadrature bit stream and a programmable formatting network (223) are also used for organizing the in-phase and quadrature components from the decimation network (221) for subsequent signal processing. The invention offers a highly integrated digital/analog RF receiver back-end which incorporates integrated filtering and a smart gain control that is compatible for use with other receiver systems and offering superior performance characteristics.

    摘要翻译: 集成的Σ-Δ射频(RF)接收机子系统(200)和方法利用多模式Σ-Δ模数转换器(215)来提供单位和多位输出。 用于降低同相和正交比特流的频率的可编程抽取网络(221)和可编程格式化网络(223)也用于从抽取网络(221)组织用于后续信号的同相和正交分量 处理。 本发明提供高度集成的数字/模拟RF接收机后端,其包括集成滤波和智能增益控制,其与其他接收机系统兼容并且提供优异的性能特性。

    Amplifier level-setting apparatus
    18.
    发明授权
    Amplifier level-setting apparatus 失效
    放大器电平设定装置

    公开(公告)号:US5239693A

    公开(公告)日:1993-08-24

    申请号:US606679

    申请日:1990-10-31

    IPC分类号: H03F1/30 H04B1/04

    CPC分类号: H03F1/303 H04B2001/0416

    摘要: An amplifier level-setting apparatus is provided for obtaining the maximum power output and highest efficiency allowable for a predetermined level of distortion. According to the invention, a training signal is applied to the input of the amplifier prior to the desired signal. The training signal level is increased while the output distortion is measured. When the output distortion level reaches a predetermined limit, the corresponding training signal input level is saved. The input signal level is then adjusted to this saved level value, thereby resulting in the maximum amplifier output level possible that is still within the distortion limit.

    摘要翻译: 提供放大器电平设定装置,用于获得最大功率输出和最大的可用于预定失真水平的效率。 根据本发明,在所需信号之前将训练信号施加到放大器的输入端。 在测量输出失真时训练信号电平增加。 当输出失真电平达到预定极限时,保存对应的训练信号输入电平。 然后将输入信号电平调整到该保存的电平值,从而导致可能的最大放大器输出电平,仍然在失真极限内。

    Power amplifier load controller and method for controlling a power amplifier load
    19.
    发明授权
    Power amplifier load controller and method for controlling a power amplifier load 有权
    功率放大器负载控制器和控制功率放大器负载的方法

    公开(公告)号:US06252456B1

    公开(公告)日:2001-06-26

    申请号:US09364226

    申请日:1999-07-29

    IPC分类号: H03F2100

    CPC分类号: H01Q11/12

    摘要: The present invention addresses the need for an apparatus and method for controlling the load of a PA, to improve PA efficiency in linear transmitters with isolator elimination (IE) circuitry, that does not require the use of high frequency RF circuitry. The present invention provides a PA load controller (130, 131) that improves the efficiency of a PA (116) by adjusting the PA load using an AGC signal (134), a level set adjustment signal (132), and a signal strength indicator (135), these three signals are readily obtained from continuous gain and phase adjustment circuitry (e.g., 102). The load controller determines a phase of the PA load that minimizes the AGC signal and a phase of the PA load that maximizes the level set adjustment signal. From these determinations, the PA load controller determines a phase of the PA load that improves the efficiency of the PA and adjusts the PA load phase accordingly.

    摘要翻译: 本发明解决了对用于控制PA的负载的装置和方法的需求,以提高不需要使用高频RF电路的隔离器消除(IE)电路的线性发射机中的PA效率。 本发明提供一种通过使用AGC信号(134),电平设定调整信号(132)和信号强度指示器(132)来调节PA负载来提高PA(116)的效率的PA负载控制器(130,131) (135),这三个信号很容易从连续增益和相位调整电路(例如102)获得。 负载控制器确定最大化AGC信号的PA负载的相位和使电平设置调整信号最大化的PA负载的相位。 从这些确定中,PA负载控制器确定PA负载的相位,从而提高PA的效率并相应地调节PA负载相位。

    Digital radio frequency receiver
    20.
    发明授权
    Digital radio frequency receiver 失效
    数字射频接收机

    公开(公告)号:US4893316A

    公开(公告)日:1990-01-09

    申请号:US890804

    申请日:1986-07-24

    摘要: A digital radio receiver is described. The digital receiver of the present invention contemplates a digital radio receiver which operates on a received analog signal which has been converted to a digital form after preselection at the output of the antenna. The digital receiver of the present invention comprises a preselector, a high-speed analog-to-digital (A/D) converter, a digitally implemented intermediate-frequency (IF) selectivity section having an output signal at substantially baseband frequencies, and digital signal processor (DSP) circuit performing demodulation and audio filtering. The radio architecture of the present invention is programmably adaptable to virtually every known modulation scheme and is particularly suitable for implementation on integrated circuits.

    摘要翻译: 描述数字无线电接收机。 本发明的数字接收机设想一种数字无线电接收机,其对接收到的模拟信号进行操作,该接收的模拟信号在天线的输出处被预选之后被转换成数字形式。 本发明的数字接收机包括预选器,高速模数(A / D)转换器,具有基本基带频率的输出信号的数字实现的中频(IF)选择部分,以及数字信号 处理器(DSP)电路执行解调和音频滤波。 本发明的无线电架构可编程地适应于几乎每个已知的调制方案,并且特别适用于集成电路上的实现。