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Adaptive Multicarrier Frequency Hopping Spread Spectrum Combined with Channel Coding

Adaptive Multicarrier Frequency Hopping Spread Spectrum Combined with Channel Coding
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Author(s): Abid Yahya (Universiti Malaysia Perlis, Malaysia), Othman Sidek (Universiti Sains Malaysia, Malaysia), Farid Ghani (Universiti Malaysia Perlis, Malaysia), R. Badlishah Ahmad (Universiti Malaysia Perlis, Malaysia) and M. F. M. Salleh (Universiti Sains Malaysia, Malaysia)
Copyright: 2011
Pages: 18
Source title: Handbook of Research on Mobility and Computing: Evolving Technologies and Ubiquitous Impacts
Source Author(s)/Editor(s): Maria Manuela Cruz-Cunha (Polytechnic Institute of Cavado and Ave, Portugal) and Fernando Moreira (Portucalense University, Portugal)
DOI: 10.4018/978-1-60960-042-6.ch010

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Abstract

This chapter presents an adaptive Multicarrier Frequency Hopping Spread Spectrum (MCFH-SS) system employing proposed Quasi Cyclic Low Density Parity Check (QC-LDPC) codes instead of the conventional LDPC codes. A new technique for constructing the QC-LDPC codes based on row division method is proposed. The new codes offer more flexibility in terms of girth, code rates and codeword length. Moreover, a new scheme for channel prediction in MCFH-SS system is also proposed. The technique adaptively estimates the channel conditions and eliminates the need for the system to transmit a request message prior to transmitting the packet data. The proposed adaptive MCFH-SS system uses PN sequences to spread out frequency spectrum, reduce the power spectral density and minimize the jammer effects.

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