Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 1998.10a
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- Pages.183-186
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- 1998
Improving the Performance of Convolutional Decoder for a COFDM Receiver using the Subchannel Information
부채널 종보를 이용한 COFDM 수신기에서의 콘볼류셔널 디코더 성능향상 기법
Abstract
In this article, an algorithm for improving the performance of the convolutional decoder for a COFDM receiver using the subchannel information is introduced. The proposed algorithm defines the average amplitude of the received signal at each subchannel as a certainty of the received signal at that subchannel. If the certainty of a subchannel is low, then the received signal of that subchannel is mitigated, and the brach matric of the convolutional decoder is affected by that signal in a relatively small degree. However if the certainty of a subchannel is high, then the signal is enlarged and the branch matric is affected in a relatively large degree. simulations will show the improved BER performance of a COFDM system when the proposed method has been applied.
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