VES1993 데이터 시트보기 (PDF) - Philips Electronics

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VES1993

Single Chip Satellite Channel Receiver

Philips Electronics 

Philips Semiconductors

Single Chip Satellite Channel Receiver

Product specification

VES1993

TABLE 5. PUNCTURING AND MAPPING

Rate

½

2/3

¾

4/5

5/6

6/7

7/8

8/9

R

Inhibition Flags

000 inh[0] = 1

inh[1] = 1

001 inh[0] = 10 10

inh[1] = 11 11

010 inh[0] = 101

inh[1] = 110

011 inh[0] = 1000 1000

inh[1] = 1111 1111

100 inh[0] = 10101

inh[1] = 11010

101 inh[0] = 100101 100101

inh[1] = 111010 111010

110 inh[0] = 1000101

inh[1] = 1111010

111 inh[0] = 10001011 10001011

inh[1] = 11110100 11110100

Mapping

I = X1

Q = Y1

I = X1Y2Y3

Q = Y1X3Y4

I = X1Y2

Q = Y1X3

I = X1Y2Y4Y5Y7

Q = Y1Y3X5Y6Y8

I = X1Y2Y4

Q = Y1X3X5

I = X1Y2X4X6Y7Y9Y11

Q = Y1Y3Y5X7Y8X10 X12

I = X1Y2X4Y6

Q = Y1Y3X5X7

I = X1Y2Y4Y6X8Y9Y11X13X15

Q = Y1Y3X5X7X9Y10Y12Y14X16

Notes :

1.Polynomial X is G1=171 inhibited with inh[0]

2.Polynomial Y is G2=133 inhibited with inh[1]

3.In DVB and RAUTO modes, the only Viterbi rates that the internal state machine will look for synchronization are :

1/2, 2/3, 3/4, 5/6 and 7/8.

4.In DSS and RAUTO modes, the only Viterbi rates that the internal state machine will look for synchronization are :

2/3 and 6/7.

1999 Jan 01

12

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