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    • 2. 发明授权
    • Hardware efficient FSK demodulator
    • 硬件高效的FSK解调器
    • US07471737B2
    • 2008-12-30
    • US11015162
    • 2004-12-17
    • Henrik T. JensenPaul Anthony Lettieri
    • Henrik T. JensenPaul Anthony Lettieri
    • H03C3/00H04L25/03
    • H04L27/368
    • A radio frequency (RF) transmitter includes a digital radio processor and a baseband processor. A complex analog-to-digital converter (ADC) within the radio processor provides an analog interface to the baseband processor to receive an analog complex modulated baseband signal and convert the analog complex modulated baseband signal to a digital complex modulated baseband signal. A demodulator within the radio processor demodulates the digital complex modulated baseband signal to recreate the original transmit digital data as a demodulated digital signal. The demodulated digital signal is processed by a digital processor in the radio processor to mitigate the effects of various imperfections in the radio processor circuitry.
    • 射频(RF)发射机包括数字无线电处理器和基带处理器。 无线电处理器内的复数模数转换器(ADC)为基带处理器提供模拟接口,以接收模拟复调制基带信号,并将模拟复调制基带信号转换为数字复调制基带信号。 无线电处理器内的解调器解调数字复调制基带信号,以重构原始发射数字数据作为解调数字信号。 解调的数字信号由无线电处理器中的数字处理器处理以减轻无线电处理器电路中各种缺陷的影响。
    • 4. 发明授权
    • Automatic gain control adjustment of a radio receiver
    • 无线电接收机的自动增益控制调整
    • US07127222B2
    • 2006-10-24
    • US10879244
    • 2004-06-28
    • Hea Joung KimPaul Anthony LettieriBrima B. Ibrahim
    • Hea Joung KimPaul Anthony LettieriBrima B. Ibrahim
    • H04B1/16
    • H03G3/3052H04B1/1027H04B1/109H04B7/0814H04B17/318H04W52/226H04W52/245H04W52/246H04W52/52
    • A method for adjusting automatic gain control of a radio receiver begins by determining power level of a radio frequency (RF) signal received by the radio receiver to produce a determined power level. The method then continues by comparing the determined power level with a plurality of power thresholds to determine whether an automatic gain adjustment is needed. The method then continues, when the automatic gain adjustment is needed, by determining, from the comparing the determined power level with the plurality of power thresholds, a sign of the automatic gain adjustment. The method continues by determining, from the comparing the determined power level with the plurality of power thresholds, a magnitude of the automatic gain adjustment. The method continues by addressing a gain adjustment look up table for at least a portion of the radio receiver based on the magnitude to produce a gain setting. The method then continues by adjusting the automatic gain of the radio receiver based on the sign of the automatic gain adjustment and the gain setting.
    • 一种用于调整无线电接收机的自动增益控制的方法,是通过确定无线电接收机接收的射频(RF)信号的功率电平来产生确定的功率电平。 该方法然后通过将确定的功率电平与多个功率阈值进行比较来继续,以确定是否需要自动增益调整。 然后,当需要自动增益调整时,通过从确定的功率电平与多个功率阈值的比较来确定自动增益调整的符号,继续该方法。 该方法通过从所确定的功率电平与多个功率阈值的比较来确定自动增益调整的幅度来继续。 该方法通过基于幅度寻址无线电接收机的至少一部分的增益调整查找表来继续以产生增益设置。 该方法然后通过基于自动增益调整和增益设置的符号来调整无线电接收机的自动增益来继续。