公开(公告)号：US06842498B2

公开(公告)日：2005-01-11

申请号：US10294227

申请日：2002-11-14

申请人： Johann Heinzl ,  Gary Jacobsen ,  Jining Yang ,  Kishan Shenoi

发明人： Johann Heinzl ,  Gary Jacobsen ,  Jining Yang ,  Kishan Shenoi

IPC分类号： G01S1/00 ,  H03J1/00 ,  H03J3/08 ,  H04B1/10

CPC分类号： G01S19/37 ,  G01S19/21 ,  H03J1/0008 ,  H03J3/08 ,  H04B1/7102

摘要： Systems and methods are described for a GPS receiver capable of functioning in the presence of interference. A method includes detecting an interfering signal including: tuning a band pass filter over a frequency range; and at each of a plurality of incremental frequencies: computing a set of band pass filter coefficients; sending the set of band pass filter coefficients to a digital filter; repeatedly transforming an analog-to-digital converter output having a quantization level in excess of 2 bits into a band pass filter output with the digital filter to obtain a plurality of samples; computing an average of the plurality of samples; and comparing the average to a threshold to detect peaks that exceed a threshold. An apparatus includes: an analog radio frequency circuit; an analog-to-digital converter coupled to the analog radio frequency circuit, the analog-to-digital converter providing a quantization level in excess of 2 bits; a digital filter coupled to the analog-to-digital converter; and a digital circuit coupled to the digital filter.

摘要翻译： 为能够在存在干扰的情况下起作用的GPS接收机描述系统和方法。 一种方法包括检测干扰信号，包括：在频率范围上调谐带通滤波器; 并且在多个增量频率中的每一个处：计算一组带通滤波器系数; 将一组带通滤波器系数发送到数字滤波器; 将具有超过2位的量化级的模数转换器输出反复变换为与数字滤波器一起输出的带通滤波器，以获得多个采样; 计算所述多个样本的平均值; 并将平均值与阈值进行比较以检测超过阈值的峰值。 一种装置包括：模拟射频电路; 耦合到所述模拟射频电路的模数转换器，所述模数转换器提供超过2位的量化级; 耦合到所述模数转换器的数字滤波器; 以及耦合到数字滤波器的数字电路。

公开(公告)号：US06512803B2

公开(公告)日：2003-01-28

申请号：US09802484

申请日：2001-03-09

申请人： Johann Heinzl ,  Gary Jacobsen ,  Jining Yang ,  Kishan Shenoi

发明人： Johann Heinzl ,  Gary Jacobsen ,  Jining Yang ,  Kishan Shenoi

IPC分类号： H04B110

CPC分类号： G01S19/37 ,  G01S19/21 ,  H03J1/0008 ,  H03J3/08 ,  H04B1/7102

摘要： Systems and methods are described for a GPS receiver capable of functioning in the presence of interference. A method includes detecting an interfering signal including: tuning a band pass filter over a frequency range; and at each of a plurality of incremental frequencies: computing a set of band pass filter coefficients; sending the set of band pass filter coefficients to a digital filter; repeatedly transforming an analog-to-digital converter output having a quantization level in excess of 2 bits into a band pass filter output with the digital filter to obtain a plurality of samples; computing an average of the plurality of samples; and comparing the average to a threshold to detect peaks that exceed a threshold. An apparatus, comprising: an analog radio frequency circuit; an analog-to-digital converter coupled to the analog radio frequency circuit, the analog-to-digital converter providing a quantization level in excess of 2 bits; a digital filter coupled to the analog-to-digital converter; and a digital circuit coupled to the digital filter.