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    • 7. 发明授权
    • Efficient header acquisition
    • 高效头部采集
    • US07660372B2
    • 2010-02-09
    • US11054652
    • 2005-02-09
    • Jind-Yeh LeeTommy YuAlan Kwentus
    • Jind-Yeh LeeTommy YuAlan Kwentus
    • H03D3/24
    • H04L7/042
    • In an integrated satellite receiver, improved header acquisition techniques are described for quickly locating a header symbol sequence in a data stream substantially implemented on a single CMOS integrated circuit. To identify the location of a header symbol sequence in a data stream, a selected header acquisition technique employs a real time correlator followed by an accumulator. Once accumulation over a predetermined number of frames is finished, the largest or maximum value among the accumulated correlator values is identified. If the maximum value exceeds a threshold, it will be declared as a peak and the address associated is the peak timing.
    • 在集成卫星接收机中,描述了改进的报头获取技术,用于将标题符号序列快速定位在基本上在单个CMOS集成电路上实现的数据流中。 为了识别数据流中标题符号序列的位置,所选择的报头获取技术采用实时相关器,后跟累加器。 一旦累积超过预定数量的帧,则识别所累积的相关器值中的最大值或最大值。 如果最大值超过阈值,它将被声明为峰值,并且相关的地址是峰值时序。
    • 9. 发明申请
    • Integrated burst FSK receiver
    • 集成突发FSK接收机
    • US20050249307A1
    • 2005-11-10
    • US10952171
    • 2004-09-29
    • Tommy YuSteve KrafftSteven JaffeAlan Kwentus
    • Tommy YuSteve KrafftSteven JaffeAlan Kwentus
    • H03D3/00H03D7/16H04L27/00H04L27/10H04L27/233
    • H04L27/2334H03D3/004H03D3/007H03D7/165
    • An integrated burst FSK receiver is provided to receive and interpret an RF signal using FSK modulation. The integrated burst FSK receiver uses a programmable RF local oscillator to mix a received signal down to an IF range or baseband, where it is filtered and sampled for subsequent digital processing. Digital filtering and detection are employed to improve overall bit error rate performance and receiver sensitivity. A programmable digital low-pass or band-pass filter can also be used to suppress interference. A matched filter correlator can be used for detection and symbol timing adjustment in one mode, while an adaptive frequency comparator can be used in another mode. Circuits are provided that estimate carrier offset, frequency deviation and signal strength. These measurements can then be used to optimize the receiver performance. A method for receiving and interpreting an RF signal using FSK modulation is also provided.
    • 提供集成突发FSK接收机,以使用FSK调制来接收和解释RF信号。 集成突发FSK接收机使用可编程RF本地振荡器将接收到的信号混合到IF范围或基带,在其中对其进行滤波和采样以用于随后的数字处理。 采用数字滤波和检测来提高总体误码率性能和接收机灵敏度。 也可以使用可编程数字低通滤波器或带通滤波器来抑制干扰。 匹配滤波器相关器可用于一种模式下的检测和符号定时调整,而自适应频率比较器可用于另一种模式。 提供了估计载波偏移,频率偏差和信号强度的电路。 然后可以使用这些测量来优化接收机性能。 还提供了一种使用FSK调制来接收和解释RF信号的方法。