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    • 4. 发明授权
    • Radio receiver and gain control method
    • 无线电接收机和增益控制方法
    • US07593705B2
    • 2009-09-22
    • US11287787
    • 2005-11-28
    • Tadahiro SatoAkifumi Adachi
    • Tadahiro SatoAkifumi Adachi
    • H04B1/06H04Q7/20
    • H03G3/3052H03G3/005H03G3/3078H03G3/3089H03G2201/103H03G2201/202H03G2201/305H04B1/707H04B2201/70701H04B2201/70706
    • A radio receiver includes a branching unit, a first gain-control system, a second-gain control system, and a signal processing unit. The branching unit branches a radio signal received by the radio receiver into two signals. The first-gain control system performs a gain control of a pilot signal in one of branched signals, and the second gain control system performs a gain control of a data signal in another of the branched signals. The signal processing unit synchronizes frames in the received radio signal. The signal processing unit outputs a gain signal to each of the first gain-control system and the second gain-control system. The first gain-control system and the second gain-control system perform the gain controls based on the gain signal.
    • 无线电接收机包括分支单元,第一增益控制系统,第二增益控制系统和信号处理单元。 分支单元将由无线电接收机接收的无线电信号分成两个信号。 第一增益控制系统以分支信号之一对导频信号进行增益控制,第二增益控制系统对分支信号中的另一个进行数据信号的增益控制。 信号处理单元同步所接收的无线电信号中的帧。 信号处理单元向第一增益控制系统和第二增益控制系统中的每一个输出增益信号。 第一增益控制系统和第二增益控制系统基于增益信号执行增益控制。
    • 7. 发明授权
    • Adaptive gain controller
    • 自适应增益控制器
    • US5727031A
    • 1998-03-10
    • US497228
    • 1995-06-30
    • Torkel C.J. SolveAntoni Fertner
    • Torkel C.J. SolveAntoni Fertner
    • H03G3/00H03G3/20H04B3/04H04B3/10H04B7/005H04L25/03H04M3/00H04M3/40H04L27/08H04L1/38
    • H03G3/3089H03G3/005H04B3/10H04M3/40H04M3/002H04W52/36
    • The present invention provides accurate, unbiased adaptive gain control in high speed digital communications systems. The probability of receiving each of a plurality of symbols to be transmitted over a data communications channel is determined for the predetermined communications protocol used over that data communications channel. Based on the probability determined for each symbol, an adaptive gain control adjustment factor is established for each symbol. During active communications, symbols transmitted over the data communications channel are detected, and the adaptive gain control value is selectively adjusted using an adjustment factor established for the detected symbol. Accordingly, adaptive gain control updating in accordance with one embodiment of the invention employs different step sizes for incrementing and decrementing the adaptive gain control value depending on the magnitude of the symbol received.
    • 本发明在高速数字通信系统中提供精确的,无偏置的自适应增益控制。 为通过数据通信信道使用的预定通信协议确定接收通过数据通信信道发送的多个符号中的每一个的概率。 基于为每个符号确定的概率,为每个符号建立自适应增益控制调节因子。 在活动通信期间,检测通过数据通信信道发送的符号,并且使用为检测到的符号建立的调整因子来选择性地调整自适应增益控制值。 因此,根据本发明的一个实施例的自适应增益控制更新采用不同的步长来根据所接收的符号的大小递增和递减自适应增益控制值。
    • 8. 发明授权
    • Linear-modulation type radio transmitter
    • 线性调制型无线电发射机
    • US5113525A
    • 1992-05-12
    • US600379
    • 1990-10-19
    • Akira Andoh
    • Akira Andoh
    • H03C1/02H03G3/00H03G3/20H04B1/04H04B7/005
    • H04W52/52H03C1/02H03G3/005H03G3/3042H04B2001/0416
    • The present invention relates to a radio transmitter which transmits from an antenna a carrier wave linearly modulated based on a signal to be transmitted. Since a monitor wave with the predetermined level applied to a transmission power amplifier is amplified and the level of the amplified monitor wave is thereafter detected, followed by adjustment of the gain of the transmission power amplifier based on its level detected, or since the comparison between the level of an envelope component of a signal prior to modulation and that of an amplified signal is made and the gain of the transmission power amplifier is adjusted based on the result of its comparison, mean transmission power is maintained at a predetermined value.
    • 无线发射机技术领域本发明涉及一种从天线发送基于要发射的信号线性调制的载波的无线发射机。 由于对发送功率放大器施加了预定电平的监视波被放大,此后检测到放大的监视波的电平,接着根据检测到的电平调整发送功率放大器的增益,或者由于 进行调制之前的信号的包络分量的电平和放大信号的信号分量的电平,并且基于其比较的结果调整发送功率放大器的增益,将平均发送功率维持在预定值。
    • 9. 发明授权
    • Varying operational frequency control circuit apparatus with noise
minimizing feature
    • 具有噪声最小化特性的变化的工作频率控制电路设备
    • US5017880A
    • 1991-05-21
    • US469647
    • 1990-01-24
    • John M. DuganGordon W. Ries
    • John M. DuganGordon W. Ries
    • H01S5/0683H03G3/00
    • H01S5/0683H03G3/005
    • Many prior control circuits inject a small amplitude control tone into the prime signal path where the distortion added to the prime or main signal by the control tone does not present a significant corruption of the prime signal. This control tone is detected and, based on the detected parameters, the prime signal is adjusted as to one of its parameters such as amplitude. If there are variable frequency spurious signals that may produce products within the bandwidth of the control system, the operation of the control circuit can be completely disrupted. The present invention overcomes the prior art problem by continuously sweeping the frequency of the control tone whereby the detection of the spurious signals in the operation of the control circuit occurs such a small percentage of the time that the control circuit can maintain reliable control operation.
    • 许多先前的控制电路将小幅度控制音调注入素数信号路径,其中通过控制音调添加到主信号或主信号的失真不会导致主信号的显着损坏。 检测该控制音,并且基于检测到的参数,调整素数信号与其参数之一如振幅。 如果存在可能在控制系统的带宽内产生产品的可变频率杂散信号,则控制电路的操作可能完全中断。 本发明通过连续扫频控制音频的频率来克服现有技术的问题,从而在控制电路的操作中检测到​​杂散信号的出现发生在控制电路可以保持可靠控制操作的时间的一小部分。