가우시안 이진 대칭 채널에서 쇄상부호의 최적 내·외 부호율에관한 연구

In this paper, we address a problem of finding the optimum inner and outer code rates for a concatenated code in Gaussianbinary symmetric channels. Clearly, as the inner code rate decreases, the error detection capability of the inner codeincreases. However, decreasing the inner code rate implies a decrease in error-correction capability of the outer code whenoverall code rate is fixed. With this notion in mind, we examine the optimum distribution of redundancy on the outer andinner codes to achieve a maximum performance gain in the concatenated coding scheme. Our analysis shows that themaximum coding gain can be obtained when the inner code rate is maximized and the outer code rate is minimized underthe constraint of total code rate is fixed.