Improvement of adaptive modulation system with optimal turbo coded V-BLAST technique

Authors:
Kyunghwan Lee;Kwangwook Choi;Sangjin Ryoo;Kyoungwon Lee;Mingoo Kang;Intae Hwang;Taejin Jung;Daejin Kim;Cheolsung Kim
Affiliations:
Dept. of Computer Engineering, Chonnam National University, Buk-gu, Gwangju, Korea;Dept. of Computer Engineering, Chonnam National University, Buk-gu, Gwangju, Korea;Dept. of Electronics Engineering, Chonnam National University, Buk-gu, Gwangju, Korea;Dept. of Electronics Engineering, Chonnam National University, Buk-gu, Gwangju, Korea;Dept. of Information Science & Telecommunication, Hanshin University, Osan, Kyongggi-do, Korea;Dept. of Electronics & Computer Engineering, Chonnam National University, Buk-gu, Gwangju, Korea;Dept. of Electronics & Computer Engineering, Chonnam National University, Buk-gu, Gwangju, Korea;Dept. of Electronics & Computer Engineering, Chonnam National University, Buk-gu, Gwangju, Korea;Dept. of Electronics & Computer Engineering, Chonnam National University, Buk-gu, Gwangju, Korea
Venue:
ICHIT'06 Proceedings of the 1st international conference on Advances in hybrid information technology
Year:
2006

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Abstract

In this paper, we propose and analyze the Adaptive Modulation System with optimal Turbo Coded V-BLAST (Vertical-Bell-lab Layered Space-Time) technique that adopts the extrinsic information from MAP (Maximum A Posteriori) Decoder with Iterative Decoding as a priori probability in two decoding procedures of a V-BLAST scheme; the ordering and the slicing. Also, comparing with the Adaptive Modulation System using conventional Turbo Coded V-BLAST technique that is simply combined a V-BLAST scheme with a Turbo Coding scheme, we observe how much throughput performance can be improved. As a result of a simulation, it has been proved that the proposed system achieves a higher throughput performance than the conventional system in the whole SNR (Signal to Noise Ratio) range. Specifically, the result shows that the maximum throughput improvement is about 350 kbps.