%?************************beginning?of?file*****************************
%Demodulator.m
function?[SD]?=?Demodulator（RxIn?PN?MF?Walsh）;?
%?
%?此函數是實現基于RAKE接收機的IS-95前向信鏈路系統的數據包的解調
?
%+++++++++++++++++++++++variables++++++++++++++++++++++++++++
%?RxIn????????????輸入信號
%?PN??????????????PN碼序列（用于解擴）?
%?MF??????????????匹配濾波器參數
%?Walsh???????????用于解調的walsh碼?
%?SD??????????????RAKE接收機的軟判決輸出
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++???????????

global?R??
N?=?length（RxIn）/R;?
?
L?=?length（MF）;?
L_2?=?floor（L/2）;?
rr?=?conv（flipud（conj（MF））?RxIn）;?
rr?=?rr（L_2+1:?end?-?L_2）;?

Rx?=?sign（real（rr（1:R:end）））?+?j*sign（imag（rr（1:R:end）））;???

Rx?=?reshape（Rx?64?N/64）;?	

Walsh?=?ones（N/64?1）*sign（Walsh‘-1/2）;
PN?=?reshape（PN?64?N/64）‘;
PN?=?PN.*Walsh;				
?
%?輸入速率?=?1.2288?Mpbs?輸出速率?=?19.2?KBps?
SD=?PN*Rx;??	?
SD=?real（diag（SD））;??
%?***********************end?of?file***********************************
?

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

?????文件???????1035??2009-03-22?17:21??IS95前向鏈路系統\Demodulator.m

?????文件??????93184??2009-03-22?18:54??IS95前向鏈路系統\IS-95?仿真源程序.doc

?????文件???????5613??2009-03-22?18:27??IS95前向鏈路系統\main_IS95_forward.m

?????文件???????1804??2009-03-22?18:37??IS95前向鏈路系統\Modulator.m

?????文件???????1106??2009-03-22?18:35??IS95前向鏈路系統\PacketBuilder.m

?????文件????????791??2009-03-22?17:03??IS95前向鏈路系統\PNGen.m

?????文件????????893??2009-03-22?17:45??IS95前向鏈路系統\ReceiverHD.m

?????文件????????922??2009-03-22?18:53??IS95前向鏈路系統\ReceiverSD.m

?????文件???????2109??2009-03-22?16:42??IS95前向鏈路系統\SoftVitDec.m

?????文件???????2107??2009-03-22?18:54??IS95前向鏈路系統\VitDec.m

?????文件????????578??2009-03-22?03:48??IS95前向鏈路系統\VitEnc.m

?????目錄??????????0??2010-04-05?14:07??IS95前向鏈路系統

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

???????????????110142????????????????????12