Joint Adaptive Combining and Variable Tap-Length Multiuser Detector for Underwater Acoustic Cooperative Communication

• Zhiyong Liu,
• Yinghua Wang,
• Lizhong Song,
• Yinyin Wang,
• Fusheng Dai,

Vol. 12, No. 1, January 30, 2018
10.3837/tiis.2018.01.016, Download Paper (Free):

• underwater acoustic cooperative communication
• interleave-division multiple access
• adaptive combining
• variable tap-length
• multiuser detector

Abstract

In this paper, we propose a joint adaptive combining and variable tap-length multiuser detector (MUD) for amplify-and-forward (AF) underwater acoustic cooperative interleave-division multiple access (IDMA) communication system. The proposed MUD jointly realizes tap-length adjustment, adaptive combining, and multiuser detection. In contrast to the existing methods, the proposed detector can adaptively combine the received signals from different nodes at destination, and does not need the assumption that full and perfect channel state information (CSI) of all the links at the receiver is known. Moreover, the proposed detector can adaptively adjust the tap coefficient vector and tap-length of each branch according to the specific channel profile of each branch. Simulation results validate the feasibility and show the advantages of the proposed detector against existing counterparts.

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