Abstract:
Underwater acoustic (UWA) communication is a major tool for underwater wireless data transmission. In this paper, cross-subband rateless encoding for filtered multitone (...Show MoreMetadata
Abstract:
Underwater acoustic (UWA) communication is a major tool for underwater wireless data transmission. In this paper, cross-subband rateless encoding for filtered multitone (FMT) in UWA communications is proposed. Rateless codes are a class of erasure correcting codes that the source data can be recovered from a minimum number of received symbols. For FMT modulation, there are fewer taps in the equivalent channel for each subband in time domain, and different subbands can be treated with different frequency-selective fadings. Therefore, recursive least square (RLS) decision feedback equalization (DFE) with less filter length can be used for symbol-recovery in each subband, and the recovered symbols from severer frequency fading subbands can be abandoned. Mean square error (MSE) values are calculated as the criteria for determining the candidate subbands, i.e. recovered symbols from those subbands with less MSE values will be adopted for rateless decoding. Cross-subbands rateless encoding is adopted for source bit encoding, and two rateless encoding schemes are adopted, which are windowed random matrices based LT code and Raptor code that takes Reed-Solomon (RS) outer correcting code together with the former LT code. The proposed method was verified by experimental results.
Published in: 2018 10th International Conference on Wireless Communications and Signal Processing (WCSP)
Date of Conference: 18-20 October 2018
Date Added to IEEE Xplore: 02 December 2018
ISBN Information: