Cooperative Communications over Flat Fading Channels with Carrier Offsets: A Double-Differential Modulation Approach. (26th May 2008)

• Record Type: Journal Article
• Authors: Bhatnagar Bhatnagar, Manav R. Manav R.; Hjørungnes Hjørungnes, Are Are; Song Song, Lingyang Lingyang
• Other Names: Shin Shin Hyundong Hyundong Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2008(2008)
• Publication Date: 2008-05-26
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2008/531786
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : We propose double-differential (DD) modulation for the amplify-and-forward protocol over Nakagami-m fading channels with carrier offsets. We propose an emulated maximum ratio combining (EMRC) decoder, which could be used by the double-differential receiver in the absence of exact channel knowledge. Approximate bit error rate (BER) analysis is performed for the proposed double-differential modulation-based cooperative communication system. The proposed double-differential system is immune to random carrier offsets, whereas the conventional single-differential modulation-based cooperative system breaks down. In addition, the proposed scheme is able to perform better than the same rate training-based cooperative system which utilizes training data for finding estimates of carrier offsets and channel gains.