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    • 12. 发明授权
    • 지엠에스케이신호복조방법 및 그 장치
    • GM SKY信号解调方法和装置
    • KR1019950003666B1
    • 1995-04-17
    • KR1019900022760
    • 1990-12-31
    • 삼성전자주식회사
    • 임무길
    • H04L23/02
    • H03D3/009H03D3/006H03D3/008H03D7/165H03D2200/005H04L27/2332H04L2027/003H04L2027/0046
    • The method involves a frequency converting step of shifting a received GMSK signal into a baseband and separating the shifted signal into I and Q component signals. An A/D converting step quantifies the I and Q component signals and encodes the quanfied I and Q component signals received to generate I and Q component data. An offset error detecting step checks the correlation between the I and Q component data and the standard waveform data to detect a slot selects the I and Q component slot data by the slot interval inform. and offset error amount and compensates the offset error of the selected I and Q component slot data. A software decision step integrates a predetermined number of data among the I and Q component slot data and determines the I and Q component demodulation data according to the result of the integration.
    • 该方法涉及将接收的GMSK信号转换为基带并将移位的信号分离为I和Q分量信号的频率转换步骤。 A / D转换步骤对I和Q分量信号进行量化,并对所接收的量化的I和Q分量信号进行编码以产生I和Q分量数据。 偏移误差检测步骤检查I和Q分量数据与标准波形数据之间的相关性,以检测时隙通过时隙间隔通知选择I和Q分量时隙数据。 和偏移误差量,并补偿所选I和Q分量槽数据的偏移误差。 软件判定步骤在I和Q分量时隙数据之间集合预定数量的数据,并根据积分的结果确定I分量解调数据和Q分量解调数据。
    • 18. 发明公开
    • 수신기에서 DC 오프셋 검출 및 제거
    • 直流偏移检测和接收器中的取消
    • KR1020080007626A
    • 2008-01-22
    • KR1020077027313
    • 2006-04-21
    • 스카이워크스 솔루션즈 인코포레이티드
    • 베미시노만제이
    • H03D1/04H04B1/06
    • H04B1/30H03D3/008
    • A DC offset detection and cancellation system for a receiver is disclosed. The DC offset detection and cancellation system comprises a downconverter configured to downconvert a received signal to a baseband level signal, the downconverted signal having a first sampling rate, a filter system configured to filter the downconverted received signal at the first sampling rate, and estimator logic configured to sample the downconverted received signal at the first sampling rate to develop a DC estimate signal representative of any direct current (DC) component present on the downconverted received signal, the filter system configured to develop a second sampling rate, where the first sampling rate is significantly higher than the second sampling rate.
    • 公开了一种用于接收机的DC偏移检测和消除系统。 DC偏移检测和消除系统包括下变频器,其被配置为将接收的信号下变频为基带电平信号,下变频信号具有第一采样率,被配置为以第一采样率对下变频的接收信号进行滤波的滤波器系统以及估计器逻辑 被配置为以所述第一采样率对所述经下变频的接收信号进行采样,以形成表示所述下变频接收信号上存在的任何直流(DC)分量的DC估计信号,所述滤波器系统被配置为开发第二采样率,其中所述第一采样率 明显高于第二次采样率。
    • 19. 发明公开
    • 기저대역 이득 제어를 갖는 수신기용 DC 오프셋 정정시스템
    • 具有基带增益控制的接收器的DC偏移校正系统
    • KR1020080002806A
    • 2008-01-04
    • KR1020077022679
    • 2006-02-28
    • 엔엑스피 유에스에이, 인코포레이티드
    • 라흐만,마히버샤흐,매니시엔.소브착,찰리스엘.
    • H03D1/04H04B1/06H04B1/10
    • H04L25/061H03D3/008H03G3/3068H04B1/30
    • A method and apparatus are provided for providing improved radio frequency (RF) receiver signal correction. For RF receiver circuitry (106) having receive path and a warmup period associated therewith and including at least one analog baseband gain control stage (218) having a gain associated therewith, the method includes the step of performing a DC correction calculation operation during the warmup period to derive a DC correction value having a first component and a second component for each of the at least one gain control stage (218). The DC correction calculation step includes the steps of performing a first closed loop correction (460) of a baseband path to derive the first component of the DC correction value and performing a second closed loop correction (462) of the receive path as a function of the (218) gain during the warmup period to derive the second component of the DC correction value. During operation after the warmup period (464, 466), an open loop correction is performed for instantaneous DC correction as function of the PMA (218) gain and the DC correction value.
    • 提供了一种用于提供改进的射频(RF)接收机信号校正的方法和装置。 对于具有接收路径和与其相关联的预热时段的RF接收器电路(106),并且包括具有与其相关联的增益的至少一个模拟基带增益控制级(218),该方法包括在预热期间执行DC校正计算操作的步骤 以产生具有用于所述至少一个增益控制级(218)中的每一个的第一分量和第二分量的DC校正值。 DC校正计算步骤包括以下步骤:执行基带路径的第一闭环校正(460)以导出DC校正值的第一分量,并且执行作为接收路径的函数的接收路径的第二闭环校正(462) (218)在预热期间获得增益,以导出DC校正值的第二分量。 在预热时段(464,466)之后的操作期间,作为PMA(218)增益和DC校正值的函数,执行用于瞬时DC校正的开环校正。
    • 20. 发明公开
    • DC 오프셋 수정 수신기
    • 接收器DC偏移校正
    • KR1020070110441A
    • 2007-11-16
    • KR1020077023269
    • 2006-03-13
    • 퀄컴 인코포레이티드
    • 라마숩라마니안난가발리크리시나모르티라구라만무카빌리크리시나키란
    • H03D1/04
    • H04L25/06H03D3/006H03D3/008H04B1/30H04L27/38
    • A system and method are provided for correcting direct current (dc) offset in a wireless communications receiver. The method disconnects the mixer signal input from a received communication signal in an initialization state. An analog signal is accepted from the mixer output and converted into digital signal. A fine correction value is generated and subtracted from the digital signal. Thus, the digital signal amplitude is minimized in response to the initial fine correction value. In a communication state, the communication signals are received at the mixer signal input. The fine correction value is subtracted from a converted digital communication signal, so that the digital communication signal is supplied with a fine corrected dc offset. The method may also generate a coarse correction value to adjust mixer current in the initialization state, and a tracking correction value in the communication state.
    • 提供了用于校正无线通信接收机中的直流(dc)偏移的系统和方法。 该方法在初始化状态下断开来自接收到的通信信号的混频信号输入。 模拟信号从混频器输出接受并转换为数字信号。 产生精细校正值并从数字信号中减去。 因此,响应于初始精细校正值,数字信号幅度被最小化。 在通信状态下,在混频器信号输入端接收通信信号。 从转换的数字通信信号中减去精细校正值,从而向数字通信信号提供精细校正的直流偏移。 该方法还可以产生粗调校正值以调整初始化状态下的混频器电流,以及通信状态下的跟踪校正值。