KR970055628A - Viterbi decoding method in multi-stage demodulation mobile communication system - Google Patents
Viterbi decoding method in multi-stage demodulation mobile communication system Download PDFInfo
- Publication number
- KR970055628A KR970055628A KR1019950054522A KR19950054522A KR970055628A KR 970055628 A KR970055628 A KR 970055628A KR 1019950054522 A KR1019950054522 A KR 1019950054522A KR 19950054522 A KR19950054522 A KR 19950054522A KR 970055628 A KR970055628 A KR 970055628A
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- South Korea
- Prior art keywords
- metric
- phases
- communication system
- mobile communication
- decoding method
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract 4
- 238000010295 mobile communication Methods 0.000 title claims 3
- 238000005562 fading Methods 0.000 abstract 2
- 230000007704 transition Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
본 발명은 다단변복조 방식을 이용한 TCM을 실제로 적용하기 위해서는 많은 수의 트렐리스(Trellis)의 상에 대한 계산으로 인해 비터비 복호기의 병목현상이 발생하는데 이를 극복하기 위해 계산량을 줄인 비터비 복호방법에 관한 것으로 각 상에 천이되는 메트릭중에서 선택된 유력한 메트릭의 값들을 각 상에 대해 모두 비교하여 가장 작은 메트릭을 보유한 상의 메트릭만을 다음 실벌주기동안에 천이될수있는 메트릭으로 사용하여 수행되는 것을 특징으로 하며 선택되는 상의 갯수는 비터비 복호기의 메트릭값을 계산할 때 가중치로도 사용되는 채널상태 정보를 이용하여 페이딩을 깊게 탄열악한 구간에서는 선택되는 상의 수를 늘리고 페이딩의 구간에 서 벗어난 비교적 안정된 구간에서는 상의 수를 작게 선택한다.In the present invention, in order to actually apply the TCM using a multi-stage demodulation method, a bottleneck of the Viterbi decoder occurs due to the calculation of a large number of trellis phases. And compare the values of the strongest metric selected from each of the metric transitions to each phase, using only the metric that has the smallest metric as the metric that can be transitioned during the next penalty period. The number of phases is increased by using the channel state information, which is also used as weight when calculating the metric value of the Viterbi decoder, to increase the number of phases selected in the deeper section of fading, and to reduce the number of phases in a relatively stable section outside of the fading section. Choose.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명이 적용되는 시스템 구조도.1 is a system structural diagram to which the present invention is applied.
제2도는 계통적 길쌈부호기의 구조도.2 is a structural diagram of a systematic weaving encoder.
제4도는 채널상태 정보 크기의 누적비율을 도시한 그래프4 is a graph showing the cumulative ratio of the size of channel state information.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950054522A KR970055628A (en) | 1995-12-22 | 1995-12-22 | Viterbi decoding method in multi-stage demodulation mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950054522A KR970055628A (en) | 1995-12-22 | 1995-12-22 | Viterbi decoding method in multi-stage demodulation mobile communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR970055628A true KR970055628A (en) | 1997-07-31 |
Family
ID=66616828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950054522A KR970055628A (en) | 1995-12-22 | 1995-12-22 | Viterbi decoding method in multi-stage demodulation mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970055628A (en) |
-
1995
- 1995-12-22 KR KR1019950054522A patent/KR970055628A/en not_active Application Discontinuation
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Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19951222 |
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Patent event code: PA02012R01D Patent event date: 19951222 Comment text: Request for Examination of Application |
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Patent event date: 19981030 Comment text: Decision to Refuse Application Patent event code: PE06012S01D Patent event date: 19980709 Comment text: Notification of reason for refusal Patent event code: PE06011S01I |