... the
degradation of the signal-to-noise ratio. Spilker
(11)
indicated that a 1-bit ADC
degrades the signal-to-noise ratio by
1. 96 dB and a 2-bit ADC degrades the
signal-to-noise by
0.55 dB. Many commercial ... preferred approach, in
actual laboratory experiments Figure
6. 5b is used because of the availability of
amplifiers.
In Figure
6. 5b, the M
/
A COM ANP-C-11 4-5 antenna...
... Jr., Global Positioning System: Theory and Applications, vols.
1 and
2, American Institute of Aeronautics and Astronautics, 370 L’Enfant Promenade,
SW, Washington, DC,
19 96.
3. Kay, S. M., Fundamentals ... expressed in distance.
The position dilution of precision is defined as
PDOP
1
j
j
2
x
+ j
2
y
+ j
2
z
(2.59)
Fundamentals of Global Positioning System Receivers: A...
... health indication of
the transmitting satellite. The MSB (bit
77) indicates a summary of the
health of the navigation data, where bit
77 equals:
0 All navigation data are OK.
1 Some or all navigation ... Global Positioning System: Theory and Applications, vols.
1 and 2, Ameri-
can Institute of Aeronautics and Astronautics,
370 L’Enfant Promenade, SW, Wash-
ington, DC,
19 96.
8...
... 0
x(n)e
j2pnk
/
N
(8.40)
Fundamentals of Global Positioning System Receivers: A Software Approach
James Bao-Yen Tsui
Copyright
2000 John Wiley & Sons, Inc.
Print ISBN
0-4 7 1-3 815 4-3 Electronic ISBN 0-4 7 1-2 005 4-9
165
CHAPTER ... to track
20 ms of data without a navigation data phase transition,
one must find a phase transition in the data. Th...
... History of GPS Development 1
1
.3 A Basic GPS Receiver 2
1
.4 Approaches of Presentation 3
1
.5 Software Approach 3
1
.6 Potential Advantages of the Software Approach 4
1
.7 Organization of the ... tracking are per-
formed by hardware. From the navigation data phase transition the subframes
and navigation data can be obtained. Ephemeris data and pseudoranges can be
FIGURE...
... maximum
Fundamentals of Global Positioning System Receivers: A Software Approach
James Bao-Yen Tsui
Copyright
2000 John Wiley & Sons, Inc.
Print ISBN
0-4 7 1-3 815 4-3 Electronic ISBN 0-4 7 1-2 005 4-9
32
CHAPTER ... efficiency of the antenna and the accuracy of the
solid angle of the antenna because the power cannot be cut off sharply at a
desire...
... 19 96.
Fundamentals of Global Positioning System Receivers: A Software Approach
James Bao-Yen Tsui
Copyright
2000 John Wiley & Sons, Inc.
Print ISBN
0-4 7 1-3 815 4-3 Electronic ISBN 0-4 7 1-2 005 4-9
54
CHAPTER ... direction shifts
westward about
50 ( 360 × 60 × 60
/
260 00) arc-seconds per year and this is a
very small value. Therefore, the verna...
... resolution.
148 ACQUISITION OF GPS C
/
A CODE SIGNALS
FIGURE 7 .6 Effect of phase transition on the delay and multiplication method.
search for 1 ms of data to acquire a satellite. Longer data are needed ... CONVOLUTION AND CIRCULAR CORRELATION
(1)
This section provides the basic mathematics to understand a simpler way to per-
form correlation. If an input signal passes through...
... navigation data in subframe
3
into
ephermeris data
clear angmat navd rymkmat
load d:
/
gps
/
big data
/
srvy
8310
;
angmat
ang;
ptnumat
transpt;
rymkmat
fintime;
[st navd]
navdat(angmat);
∗
find naviga ... data bit. The signs of these navigation data are arbitrarily chosen.
The navigation data are designated as +
1 and 1. The parity check process can
put the navigation data in the correct pol...
... formats. Some content that appears in
print, however, may not be available in electronic format.
Library of Congress Cataloging-in-Publication Data
Tsui, James Bao-yen.
Fundamentals of global positioning ... From the navigation data phase transition the subframes
and navigation data can be obtained. Ephemeris data and pseudoranges can be
obtained from the navigation data. The epheme...