参数资料
| 型号： | IP-VITERBI/SS |
| 厂商： | Altera |
| 文件页数： | 43/50页 |
| 文件大小： | 0K |
| 描述： | IP VITERBI LOW-SPEED |
| 标准包装： | 1 |
| 系列： | * |
| 类型： | MegaCore |
| 功能： | Viterbi 低速编译器 |
| 许可证： | 初始许可证 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页当前第43页第44页第45页第46页第47页第48页第49页第50页
Chapter 3: Functional Description
Signals
Table 3–10. Configuration Signals (Part 2 of 2)
Signal Name
Description
3–17
Selects the codeword—’0’ selects the first codeword, ‘1’ selects the second,
sel_code[log2(Ncodes):1]
tb_length[]
tb_type
tr_init_state[(L-1):1]
and so on. The bus size increases according to the number of codes
specified. sel_code is latched when sink_sop is asserted.
Traceback length. The maximum width of tb_length is equal to the
maximum value of parameter v . The tb_length input is latched when
sink_sop is asserted. This signal is disabled if you select the continuous
optimization and you must remove it from the testbench.
Altera recommends that you set tb_type high always for future
compatibility. In block decoding when tb_type is low, the decoder starts
from state 0; when tb_type is high, the decoder uses the state specified in
tr_init_state[(L-1):1] . For block decoding set tb_type high.
tb_type is latched when sink_eop is asserted. If you select continuous
optimization, this input is removed from the top level design and connected
to zero in the inner core.
Specifies the state to start the traceback from, when tb_type is asserted
high. tr_init_state is latched when sink_eop is asserted. If you select
continuous optimization, this input is removed from the top level design and
connected to zero in the inner core. For more information, refer to “Trellis
Termination” on page 3–8 .
Specifies the state in which to initialize with the value from the
bm_init_state[(L-1):1]
bm_init_value[(L-1):1]
(1)
(1)
bm_init_value[] bus. All other state metrics are set to zero.
bm_init_state is latched when sink_sop is asserted.
Specifies the value of the metric that initializes the start state. All other
metrics are set to 0. bm_init_value must be larger than
( L × 2 (softbits – 1) ). bm_init_value is latched when sink_sop is asserted.
Note to Table 3–10 :
(1) Hybrid architecture only.
Table 3–11 shows the status signals.
Table 3–11. Status Signals (Part 1 of 2)
Signal
normalizations[8:1]
Description
The normalizations bus indicates in real time the number of normalizations that have
occurred since sink_sop was last activated. (Refer to “State Metrics” on page 3–2 .)
The numerr bus contains the number of errors detected during a block. It is updated
each time an error is detected, so you can see the location of individual errors. It is reset
numerr[]
(1)
when source_sop asserted; it is valid two-clock cycles after source_sop . IP Toolbench
automatically sets the width of this bus. This signal is left open if you do not select a
BER block.
The best metric. The bestmet signal shows the best state metric for every trellis step as
bestmet[bmgwide:1]
it is being found by the best state finder. The state that contains this best metric is
shown in bestadd . This signal is left open, if you select continuous optimization, or if
you select none for optimization and turn off best state finder in IP Toolbench.
November 2013
Altera Corporation
Viterbi Compiler
User Guide
相关PDF资料 |
PDF描述 |
|---|---|
| IP4220CZ6,125 | IC USB DUAL ESD PROTECT 6TSOP |
| IPA-66-1-600-10.0-A-01-T | CIRC BRKR 10A 2POLE SCREW TERM |
| IPR-CSC | IP COLOR SPACE CONVERTER RENEW |
| IPR-ED8B10B | IP 8B10B ENCODER/DECODER RENEW |
| IPS-VIDEO | IP VIDEO/IMAGE PROCESSING SUITE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IPW 2819 | 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW 11INX7.5IN 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW, 11INX7.5IN 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW, 11INX7.5IN; For Use With:Front Panel Mounted Meters; Enclosure Material:-; IP Rating:(Not Available); Highest NEMA Rating:4X; External Height - Imperial:11"; External Width - Imperial:7.5"; NEMA Type:4X ;RoHS Compliant: Yes |
| IPW 2819-G | 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW 11INX7.5IN 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW, 11INX7.5IN; For Use With:Front Panel Mounted Meters; Enclosure Material:-; IP Rating:(Not Available); Highest NEMA Rating:4X; External Height - Imperial:11"; External Width - Imperial:7.5"; NEMA Type:4X ;RoHS Compliant: Yes |
| IPW 2828 | 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW 11INX11IN 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW, 11INX11IN; For Use With:Front Panel Mounted Meters; Enclosure Material:-; IP Rating:(Not Available); Highest NEMA Rating:4X; External Height - Imperial:11"; External Width - Imperial:11"; NEMA Type:4X ;RoHS Compliant: Yes |
| IPW 3819 | 制造商:FIBOX 功能描述:Inspection Window 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW, 15INX7.5IN, For Use With:Front Panel Mounted Meter 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW, 15INX7.5IN, For Use With:Front Panel Mounted Meters, Enclosure Material:-, IP Rating:-, NEMA Rating:4X, External Height - Imperial:15", External Width - Imperial:7.5", External Width - Metric:191mm , RoHS Compliant: Yes |
| IPW 3828 | 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW 15INX11IN 制造商:FIBOX 功能描述:INSTRUMENT PROTECTION WINDOW, 15INX11IN; For Use With:Front Panel Mounted Meters; Enclosure Material:-; IP Rating:(Not Available); Highest NEMA Rating:4X; External Height - Imperial:15"; External Width - Imperial:11"; NEMA Type:4X ;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。