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Throughput Analysis of DS/CDMA System Applying Packet Combining Scheme over Nakagami Fading Channel  

황재문 (극동정보대학 컴퓨터게임과)
박진수 (청주대학교 전자공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.7, no.1, 2003 , pp. 9-18 More about this Journal
Abstract
In this paper, we analyzed the throughput of DS/CDMA system applying packet combining scheme combined with Type- I Hybrid ARQ scheme over AWGN channel and Nakagami fading channel with RAKE receiver. As the parameter for analysis, we used number of combined packet(L), number of diversity branch$({L_c})$, fading index(m), and length of packet(N), and used CRC-12 error detection code and (2,1,3) convolutional code. As a results, we found that throughput of system over Nakagami fading channel with RAKE receiver was superior to throughput over AWGN channel, and throughput of system decreases rapidly as channel degrades when number of combined packet(L) was increased. However throughput of system with the combining scheme was achieved even at low ${E_b}/{N_o}$. Also, we found that throughput of system was increased when fading index(m) and number of diversity branch$({L_c})$ were increased, but it was decreased when number of user(K) and length of packet(N) were increased.
Keywords
DS/CDMA; Type- I Hybrid ARQ; Packet Combining; Throughput; Nakagami Fading;
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