Description: A. 产生一个长为1000的二进制随机序列，“0”的概率为0.8，”1”的概率为0.2；B. 对上述数据进行归零AMI编码，脉冲宽度为符号宽度的50%，波形采样率为符号率的8倍，画出前20个符号对应的波形（同时给出前20位信源序列）；C. 改用HDB3码，画出前20个符号对应的波形；D. 改用密勒码，画出前20个符号对应的波形；E. 分别对上述1000个符号的波形进行功率谱估计，画出功率谱；F. 改变信源“0”的概率，观察AMI码的功率谱变化情况；-have a length of 1,000 random binary sequence, "0" with a probability of 0.8, "a" with a probability of 0.2; B. above zero AMI data coding, and pulse width of symbols width of 50%, waveform sampling rate Symbol rate for the eight times that he painted before the 20 symbols corresponding waveforms (also given before 20 Source sequence); C. HDB3 code switch to depict the former 20 symbols corresponding waveform; D. Miller to switch codes to depict the former 20 symbols corresponding waveform; E. respectively above 1,000 symbols for the power spectrum waveform estimated to depict the power spectrum; F. Change source "0" the probability to observe AMI code changes in the power spectrum; Platform: |
Size: 59392 |
Author:郭慧勤 |
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Description: 一个GPS课程的全部代码，含有数据！很实用-MATLAB GPS SCRIPTS-- Charles Meertens and Doug Miller, U. Utah 3Jan95
These scripts were developed for/during a class in GPS and Active Tectonics
Department of Geology and Geophysics, U. Utah, Spring, 1994
EXAMPLE RINEX Files (the only ones guaranteed to work this release)
CUR10911.94N
CUR10911.94O
PAR10910.94N
PAR10910.94O
Main Program scripts:
gpshora.m -- function to calculate Modified Julian Day, Homework#1
HW2.m -- Homework#2 read RINEX observation file and plot C/A code vrs. time
HW3_plt.m-- Homework#3 read RINEX navigation file, plot satellite positions
HW3_3dplt.m-- Same as HW3_plt.m, but 3d position plots
HW4.m-- Homework#4 calculate and plot station position as function of time
Functions called:
calc_nav.m-- calculate satellite position
calc_pos1.m-- calculate station position
constants.m-- GPS constants
coords.m-- convert x,y,z coordinates to lat, long, height
date2j.m-- calculate MDJ
eccenr.m-- calculate "E" anomally
read_nav.m-- Read RINEX Nav file
r Platform: |
Size: 816128 |
Author:王楠 |
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