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?and?Dennis?M.?Akos
%?Written?by?Darius?Plausinaitis?and?Dennis?M.?Akos
%?based?on?Peter?Rinder?and?Nicolaj?Bertelsen
%--------------------------------------------------------------------------
%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??02110-1301
%USA.
%--------------------------------------------------------------------------
?
%CVS?record:
%$Id:?acquisition.mv?1.1.2.12?2006/08/14?12:08:03?dpl?Exp?$
?
%%?Initialization?=========================================================
?
%?Find?number?of?samples?per?spreading?code
samplesPerCode?=?round（settings.samplingFreq?/?...
????????????????????????（settings.codeFreqBasis?/?settings.codeLength））;
?
%?Create?two?1msec?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）
numbe