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公开(公告)号：US20210018632A1
公开(公告)日：2021-01-21
申请号：US17028729
申请日：2020-09-22
Applicant: Texas Instruments Incorporated
Inventor： Jasbir Singh Nayyar , Sreenath Narayanan Potty , Sunil Chomal
IPC: G01S19/30 , H04B1/7075
Abstract: A personal navigation device includes a correlator for processing GNSS signals from a constellation of satellites A signal is received from a navigation beacon containing a repeating code word, in which the code word includes a number N of samples corresponding to N phases, and in which reception of each code word occurs within a defined time period T. The sequence of N code samples is correlated with a known code word to determine a maximum value of correlation for a particular phase of the received signal. The correlation is performed using a correlator of size M, in which M is less than N, such that N/M=P complete correlations for a partial code phase are performed such that each correlation of a partial code phase is performed within a time period of approximately T/P. All P correlations of partial code phases are completed within time T.
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公开(公告)号：US09184762B2
公开(公告)日：2015-11-10
申请号：US14656205
申请日：2015-03-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sthanunathan Ramakrishnan , Sashidharan Venkatraman , Sreenath Narayanan Potty , Sunil Chomal , Nagarajan Viswanathan , Jawaharlal Tangudu
CPC classification number: H03M1/368 , H03M1/06 , H03M1/0836 , H03M1/1038 , H03M1/1085 , H03M1/121 , H03M1/1215
Abstract: A system can include a signal image correlator receives a discrete frequency domain representation of a signal tone in an interleaved analog-to-digital (IADC) signal and an image of the signal tone in the discrete frequency domain representation of the IADC signal and determines a correlation between the signal tone and the image of the signal tone, a power of the signal tone and a power of the image of the signal tone. The system can also include a frequency domain estimator that determines an instantaneous frequency domain mismatch profile estimate based on the correlation between the signal tone and the image of the signal tone. The system can further include an averaging filter that averages the instantaneous frequency domain mismatch profile estimate over time to provide a frequency domain mismatch profile estimate.
Abstract translation: 系统可以包括信号图像相关器接收交织的模数（IADC）信号中的信号音的离散频域表示和IADC信号的离散频域表示中的信号音的图像，并且确定 信号音和信号音的图像之间的相关性，信号音的功率和信号音的图像的功率。 该系统还可以包括频域估计器，其基于信号音和信号音的图像之间的相关性来确定瞬时频域失配曲线估计。 该系统还可以包括平均滤波器，其对瞬时频域失配曲线估计进行平均以提供频域不匹配曲线估计。
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公开(公告)号：US20150263753A1
公开(公告)日：2015-09-17
申请号：US14656205
申请日：2015-03-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： STHANUNATHAN RAMAKRISHNAN , Sashidharan Venkatraman , Sreenath Narayanan Potty , Sunil Chomal , Nagarajan Viswanathan , Jawaharlal Tangudu
CPC classification number: H03M1/368 , H03M1/06 , H03M1/0836 , H03M1/1038 , H03M1/1085 , H03M1/121 , H03M1/1215
Abstract: A system can include a signal image correlator receives a discrete frequency domain representation of a signal tone in an interleaved analog-to-digital (IADC) signal and an image of the signal tone in the discrete frequency domain representation of the IADC signal and determines a correlation between the signal tone and the image of the signal tone, a power of the signal tone and a power of the image of the signal tone. The system can also include a frequency domain estimator that determines an instantaneous frequency domain mismatch profile estimate based on the correlation between the signal tone and the image of the signal tone. The system can further include an averaging filter that averages the instantaneous frequency domain mismatch profile estimate over time to provide a frequency domain mismatch profile estimate.
Abstract translation: 系统可以包括信号图像相关器接收交织的模数（IADC）信号中的信号音的离散频域表示和IADC信号的离散频域表示中的信号音的图像，并且确定 信号音和信号音的图像之间的相关性，信号音的功率和信号音的图像的功率。 该系统还可以包括频域估计器，其基于信号音和信号音的图像之间的相关性来确定瞬时频域失配曲线估计。 该系统还可以包括平均滤波器，其对瞬时频域失配曲线估计进行平均以提供频域不匹配曲线估计。
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