- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄377001 > DSP56600 (飛思卡爾半導(dǎo)體(中國(guó))有限公司) Implementing Viterbi Decoders Using the VSL Instruction on DSP Families PDF資料下載
參數(shù)資料
| 型號(hào)： | DSP56600 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國(guó))有限公司 |
| 英文描述： | Implementing Viterbi Decoders Using the VSL Instruction on DSP Families |
| 中文描述： | 維特比解碼器實(shí)現(xiàn)上使用DSP的家庭教學(xué)的VSL |
| 文件頁(yè)數(shù)： | 87/108頁(yè) |
| 文件大小： | 726K |
| 代理商： | DSP56600 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)當(dāng)前第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)
Extended Algorithm Program Listing
Viterbi Decoder Implementation
For More Information On This Product,
Go to: www.freescale.com
B-9
;***********************TRACEBACK OUTPUT PATH MACRO*******************
;
FUNCTION: To output the correct data, we begin at the end. We take
;
the output path of the survivor state (0), and place its
;
associated output path in memory as the last output data
;
byte. Then we use bits 3-7 of that data as an offset pointer
;
to the correct traceback data of the next previous path data
;
memory. We continue this until we have traced the data back
;
to the begining.
;
INPUTS:
;
n0 should point to memory where the path bits are to be stored
;
r5 should point to the latest path metric for state 0
;
OUTPUTS:
;
Decoder output data in Y memory
;
REGISTERS USED:
;
a,b,y,r0,n0,r2,r5
;
;*********************************************************************
;
Store off path data in bytes to avoid overflow in path reg's
TRACEBACK macro
;
move
N0,R0
move
#0,n0
move
#DECOUT+(NUMINPUTS/8/2),r2 ;point to end of output buffer
move
y:(r5),b
move
#-1,m2
move
b1,x:(r0)
move
#$513,y0
;
;*****************BEGIN TRACEBACK*****************************
IF (EVEN==0)
move
x:(r0+n0),a
extractu y0,a,b
lua
(r0-NUMSTATES),r0
lsl
#8,a
move
b0,n0
move
a1,y:(r2)-
ENDIF
;
do
#NUMINPUTS/8/2,TRCBK
move
x:(r0+n0),a
extractu y0,a,b
lua
(r0-NUMSTATES),r0
move
b0,n0
move
a1,y1
move
x:(r0+n0),a
extractu y0,a,b
lua
(r0-NUMSTATES),r0
move
b0,n0
lsl
#8,a
or
y1,a
move
a1,y:(r2)-
TRCBK
endm
;path ptr to r0
;prep for traceback
;recall last path
;r2 now linear
;save off last path data
;control word for extract
;recall last path
;bits 3-7 of a1 point to next data
;dec r0 to next earlier path set
;move to upper byte
;load as offset for traceback
;save off
;once for each byte pair
;recall last path
;get ptr to next earlier path
;point r0 to next earlier states
;save ptr as offset
;save out byte in x1
;do it all again!
;move to upper byte
;or in last byte to get 16 bit word
;store result
Example B-1
Extended Algorithm Program Listing (Continued)
F
Freescale Semiconductor, Inc.
n
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DSP56852E | 16-bit Digital Signal Controllers |
| DSP56852VFE | 16-bit Digital Signal Controllers |
| DSP56853E | 16-bit Digital Signal Controllers |
| DSP56853FG120 | 16-bit Digital Signal Controllers |
| DSP56853FGE | 16-bit Digital Signal Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DSP56600AD | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:INTERGRATED CELLULAR BASEBAND PROCESSOR DEVELOPMENT IC |
| DSP56600FM | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:16-BIT DIGITAL SIGNAL PROCESSOR |
| DSP56602 | 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:16-Bit Digital Signal Processor User manual |
| DSP56602AD | 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:16-Bit Digital Signal Processor User manual |
| DSP56602DS | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:DSP56602 16-Bit Digital Signal Processor Datasheet |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。