Download A Software-Defined GPS and Galileo Receiver: A by Kai Borre, Dennis M. Akos, Nicolaj Bertelsen, Peter Rinder, PDF

By Kai Borre, Dennis M. Akos, Nicolaj Bertelsen, Peter Rinder, Søren Holdt Jensen

This booklet discover using new applied sciences within the zone of satellite tv for pc navigation receivers. so as to construct a reconfigurable receiver with quite a lot of purposes, the authors speak about receiver structure in response to software-defined radio strategies. The presentation unfolds in a straightforward variety and is going from the fundamentals to state-of-the-art examine. The ebook is aimed toward utilized mathematicians, electric engineers, geodesists, and graduate scholars. it can be used as a textbook in a variety of GPS expertise and sign processing classes, or as a self-study reference for someone operating with satellite tv for pc navigation receivers.

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Extra resources for A Software-Defined GPS and Galileo Receiver: A Single-Frequency Approach

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15). 4) where ∗ denotes convolution. 5) m=0 for m = ±1, ±2, ±3, . . ; see Kaplan & Hegarty (2006), page 119. 5. The C/A code generator contains two shift registers known as G 1 and G 2 . These shift registers each 22 2. 4. Stem plot of an ACF for a Gold sequence. The left stem has correlation value 63 , −1 , or −65 . Only the first 50 lags out r p (0) = 1; all other correlation values are 1023 1023 1023 of 1023 are shown. have 10 cells generating sequences of length 1023. The two resulting 1023 chiplong sequences are modulo-2 added to generate a 1023 chip-long C/A code, only if the polynomial is able to generate code of maximum length.

The X 1 and X 2 codes can be combined with 37 different delays on the X 2 code to produce 37 different one-week segments of the P code. Each of the first 32 segments is associated with a different satellite. 4 Correlation Properties The Gold codes are selected as spreading sequences for the GPS signals because of their characteristics. The most important characteristics of the C/A codes are their correlation properties. These properties are described now. The two important correlation properties of the C/A codes can be stated as follows: Nearly no cross correlation All the C/A codes are nearly uncorrelated with each other.

Outside the correlation interval the ACF of p(t) is −1/N. 4. 15). 4) where ∗ denotes convolution. 5) m=0 for m = ±1, ±2, ±3, . . ; see Kaplan & Hegarty (2006), page 119. 5. The C/A code generator contains two shift registers known as G 1 and G 2 . These shift registers each 22 2. 4. Stem plot of an ACF for a Gold sequence. The left stem has correlation value 63 , −1 , or −65 . Only the first 50 lags out r p (0) = 1; all other correlation values are 1023 1023 1023 of 1023 are shown. have 10 cells generating sequences of length 1023.

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