???function?[h]=cost_207（Sel_TypeOfChanTfd）
????%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
????%%%%%%%%%%%%%%%?????????????COST207?CHANNEL?MODEL????%%%%%%%%%%%%%%
???%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
???%?h=channel?handle?output
???%?T=sample?period
???%?fd=maximum?doppler?frequency
???%?Sel_TypeOfChan=type?of?channel?choicethere?are?four?different?types?
???%??specified?in?Cost207?Model?including?RA（Rural?Area）（when?
???%??Sel_TypeOfChan=1）TU（Typical?Urban）（when??Sel_TypeOfChan=2）
???%??BU（Bad?Urban）（when?Sel_TypeOfChan=3）HT（Hilly?Terrian）（when
???%??Sel_TypeOfChan=4）?all?the?types?belong?to?multi-pathes?channel
???%?Project?Name:?Echo?Canceller
%?Author??????:?Chang?Liu
%?Index???????:?[Keywords?of?the?project]
%?Simulator???:?Mathworks?MATLAB?7.6（R14）?SP3
%?Date?Created:?2008-12-19
%?Last?Update?:?2008-12-19
%?Version:????:?
%?Description?:?[detailed?functional?description?of?the?module/function]
%?References??:?[The?citation?list.]
%?Dependency??:?[The?called?functions?or?scripts.]
%
%?Copyright?2008-2009?DSP?EC?R&D?Group.
%
%%?Revision?History
%?Rev.?NO.????:
%?Version?????:
%?Rev.?Date???:
%?Mender??????:
%?Description?:
%?References??:?[The?citation?list.]
%?Dependency??:?[The?called?functions?or?scripts.]
%%
%?Rev.?NO.????:
%?Version?????:
%?Rev.?Date???:
%?Mender??????:
%?Description?:
%?References??:?[The?citation?list.]
%?Dependency??:?[The?called?functions?or?scripts.]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
??%construct?tow?types?of?Bigaussian?doppler?model?in?cost207?channel?model
??TypeOfDop1_bigaussian?=?doppler.bigaussian（‘SigmaGaussian1‘?0.05?...
??????????????????????????‘SigmaGaussian2‘?0.1?...
??????????????????????????‘CenterFreqGaussian1‘?-0.8?...
??????????????????????????‘CenterFreqGaussian2‘?0.4?...
???????????????????????????‘GainGaussian1‘?1?...
???????????????????????????‘GainGaussian2‘?1/10）;
??
??TypeOfDop2_bigaussian=doppler.bigaussian（‘SigmaGaussian1‘?0.1?...
??????????????????????????‘SigmaGaussian2‘?0.15?...
??????????????????????????‘CenterFreqGaussian1‘?0.7?...
??????????????????????????‘CenterFreqGaussian2‘?-0.4?...
???????????????????????????‘GainGaussian1‘?1?...
???????????????????????????‘GainGaussian2‘?1/10^1.5）;??
????????????????
????switch?（Sel_TypeOfChan）
???????
???????case[1]??????%choose?RA?TYPE6?paths
?????????tau=[0?0.1?0.2?0.3?0.4?0.5].*1e-6;??%delay?of?the?RA?channel
?????????pdb=[0?-4?-8?-12?-16?-20];??%power?of?the?RA?channel
?????????%these?parameters?selected?from?the?article?“Performance?of?an?echo
?????????%canceller?and?channel?estimater?for?On-channel?repeaters?in
?????????%DVB_T/H?networks“?IEEE?Transaction?on?broadcasting?2007.3
?????????k=0.91/0.41;??%K?factor?in?ricianchan?of?RA
?????????h=ricianchan（Tfdktaupdb0.7*fd）;
????????????
????????case[2]?????%choose?TU?TYPE?12?pathes
???????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????5455??2009-02-28?17:12??cost_207.m

-----------?---------??----------?-----??----

?????????????????5455????????????????????1