Signal Acquisition and Tracking Loop Design for GNSS Receivers

نویسنده

  • Kewen Sun
چکیده

where • Ai is the amplitude of the i th useful signal; • τi is the code phase delay introduced by the transmission channel; • ci(t − τi) is the spreading sequence which is given by the product of several terms and it is assumed to take value in the set {−1, 1}; • di(t − τi) is the navigation message, Binary Phase Shift Keying (BPSK) modulated, containing satellite data, each binary unit is called bit;

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Novel Sampling Approach in GNSS-RO Receivers with Open Loop Tracking Method

Propagation of radio occultation (RO) signals through the lower troposphere results in high phase acceleration and low signal to noise ratio signal. The excess Doppler estimation accuracy in lower troposphere is very important in receiving RO signals which can be estimated by sliding window spectral analysis. To do this, various frequency estimation methods such as MUSIC and ESPRIT can be adopt...

متن کامل

Evaluation of Geometric and Atmospheric Doppler for GNSS-RO Payloads

To reduce the sampling rate in global navigation satellite system (GNSS)-radio occultation receivers, it is essential to establish a suitable estimation of Doppler frequency from the received signal in the satellite onboard receiver. This receiver is usually located on low earth orbit satellite and receives GNSS satellites signal in the occultation situation. The occurred Doppler on the signal ...

متن کامل

Delay Lock Loop Assisted Phase Lock Loop for GNSS Signal Tracking

—For positioning with Global Navigation Satellite System (GNSS) in urban canyon area, besides the weak signal power, the satellite signal may also be frequently sheltered and no power can be received. It is a great challenge for the GNSS receiver to keep positioning continuously. If the tracking loop in GNSS receivers can recover locking the signal soon after the signal appears again, it will ...

متن کامل

How Comb Filters can be used in GNSS Receivers

This is a non-refereed presentation that examines the use of comb filters in GNSS receivers, reviewing some of the discussion recently presented in [1]. Because the GPS L1 C/A code signal has a spectrum made up of lines regularly spaced at 1kHz intervals, the use of comb filters, which have regularly spaced passor stop-bands, would on the face of it seem a logical step. It is shown, however, th...

متن کامل

A Python Software Platform for Cooperatively Tracking Multiple GPS Receivers

Existing software platforms are not well suited to the task of processing data from a network of GNSS receivers. Because data are expected to be shared amongst networked receivers, not only must new algorithms be designed, but new software platforms upon which these algorithms can be tested must also be built. In this work a software platform for simultaneously processing data from many GNSS re...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2013