经典GNSS卫星导航程序.rar

【MATLAB实现】经典GNSS卫星导航程序 Matlab源代码 包括：捕获、跟踪、解算定位

function acqResults = acquisition（longSignal settings）
% Function performs cold start acquisition on the collected “data“.
% It searches for GPS signals of all satellites which are listed in field “acqSatelliteList“ in the settings structure.
% Function saves code phase and frequency of the detected signals in the “acqResults“ structure.
%
% acqResults = acquisition（longSignal settings）
%
%   Inputs:
%       longSignal   - 11 ms of raw signal from the front-end 
%       settings       - Receiver settings.
%                            Provides information about sampling and intermediate frequencies and other parameters
%                            including the list of the satellites to be acquired.              
%   Outputs:
%       acqResults   - Function saves code phases and frequencies of the detected signals in the “acqResults“ structure.
%                            The field “carrFreq“ is set to 0 if the signal is not detected for the given PRN number.            
 
%--------------------------------------------------------------------------
%                           SoftGNSS v3.0
% 
% Copyright （C） Darius Plausinaitis
% Written by Darius Plausinaitis Dennis M. Akos
% Some ideas by Dennis M. Akos
%--------------------------------------------------------------------------
%This program is free software; 
%you can redistribute it and/or modify it under the terms of the GNU General Public License
%as published by the Free Software Foundation;
%either version 2 of the License or （at your option） any later version.
%
%This program is distributed in the hope that it will be useful
%but WITHOUT ANY WARRANTY; without even the implied warranty of
%MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
%See the GNU General Public License for more details.
%
%You should have received a copy of the GNU General Public License along with this program;
% if not write to the Free Software Foundation Inc.
% 51 Franklin Street Fifth Floor Boston MA  02110-1301USA.
%--------------------------------------------------------------------------

%CVS record: acquisition.mv 1.1.2.12 2006/08/14 12:08:03 dpl Exp $

%% Initialization ==================================================
% Find number of samples per spreading code
samplesPerCode = round（settings.samplingFreq / （settings.codeFreqBasis / settings.codeLength））;

% Create two 1 ms vectors of data to correlate with and one with zero DC
signal1 = longSignal（1 : samplesPerCode）;
signal2 = longSignal（samplesPerCode+1 : 2*samplesPerCode）;

signal0DC = longSignal - mean（longSignal）;

% Find sampling period
ts = 1 / settings.samplingFreq;

% Find phase points of the local carrier wave
phasePoints = （0 : （samplesPerCode-1）） * 2 * pi * ts;

% Number of the frequency bins for the given acquisition band （500Hz steps）
numberOfFrqBins = round（settings.acqSearchBand * 2） + 1;

% Generate all C/A codes and sample them according to the sampling freq.
c

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       8532  2014-02-19 13:32  GNSS_SoftReceiver_MATLAB_work yuanshi\acquisition.m

     文件       3046  2014-02-23 21:59  GNSS_SoftReceiver_MATLAB_work yuanshi\calculatePseudoranges.m

     文件        866  2014-02-23 12:06  GNSS_SoftReceiver_MATLAB_work yuanshi\exp.m

     文件       6237  2014-02-20 10:05  GNSS_SoftReceiver_MATLAB_work yuanshi\findPreambles.m

     文件       1720  2010-06-23 11:26  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\cart2geo.m

     文件       5055  2010-06-23 11:26  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\cart2utm.m

     文件        672  2014-02-19 17:25  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\check_t.m

     文件        945  2010-06-23 11:26  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\clksin.m

     文件        619  2010-06-23 11:27  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\clsin.m

     文件       1026  2009-02-24 11:03  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\deg2dms.m

     文件       1193  2009-02-24 11:03  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\dms2mat.m

     文件       1135  2014-02-20 15:15  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\e_r_corr.m

     文件       2650  2010-06-23 11:27  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\findUtmZone.m

     文件       1543  2010-06-23 11:27  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\geo2cart.m

     文件       4077  2014-02-21 20:25  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\leastSquarePos.m

     文件       4832  2014-02-20 11:14  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\satpos.m

     文件       2892  2010-06-23 11:27  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\togeod.m

     文件       1418  2010-06-23 11:27  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\topocent.m

     文件       2900  2010-06-23 11:27  GNSS_SoftReceiver_MATLAB_work yuanshi\geoFunctions\tropo.m

     文件       1736  2014-02-17 21:01  GNSS_SoftReceiver_MATLAB_work yuanshi\include\calcLoopCoef.m

     文件       1861  2014-02-19 16:26  GNSS_SoftReceiver_MATLAB_work yuanshi\include\checkPhase.m

     文件       6946  2014-02-19 22:25  GNSS_SoftReceiver_MATLAB_work yuanshi\include\ephemeris.m

     文件       3481  2014-02-18 18:56  GNSS_SoftReceiver_MATLAB_work yuanshi\include\generateCAcode.m

     文件       1424  2010-06-23 11:26  GNSS_SoftReceiver_MATLAB_work yuanshi\include\invert.m

     文件       3040  2014-02-18 17:14  GNSS_SoftReceiver_MATLAB_work yuanshi\include\makeCaTable.m

     文件       4653  2009-02-24 11:03  GNSS_SoftReceiver_MATLAB_work yuanshi\include\navPartyChk.m

     文件       3329  2014-02-18 19:07  GNSS_SoftReceiver_MATLAB_work yuanshi\include\preRun.m

     文件       2739  2014-02-23 14:14  GNSS_SoftReceiver_MATLAB_work yuanshi\include\showChannelStatus.m

     文件       5851  2014-02-17 22:00  GNSS_SoftReceiver_MATLAB_work yuanshi\include\skyPlot.m

     文件       1749  2014-02-20 10:40  GNSS_SoftReceiver_MATLAB_work yuanshi\include\twosComp2dec.m

............此处省略24个文件信息