Paper Info
Title
Maximum Likelihood Demodulators And Their Evaluations On Amplify-And-Forward Cooperative Ofdm-Based Wireless Lan Systems
Abstract
In this paper, we propose demodulators for the Golden and Alamouti codes in amplify-and-forward (AF) cooperative communication with one relay. The proposed demodulators output exact log likelihood ratios (LLRs) with recursion based on the Jacobian logarithm. The cooperative system with the proposed demodulator for the Golden code has the benefit of efficient data transmission, while the system for the Alamouti code has low demodulation complexity. Quantitative analyses of computational complexity of the proposed demodulators are conducted. The transmission performance for various relay location and power settings is evaluated on cooperative orthogonal frequency division multiplexing (OFDM)-based wireless local area network (LAN) systems. In evaluations, the optimal relay location and power settings are found. The cooperative system with the proposed demodulators for the Golden and Alamouti codes offers 1.5 and 1.9 times larger areas where 10.8 and 5.4Mbit/s can be obtained than a non-cooperative (direct) system in a typical office environment, respectively.
Year
DOI
Venue
2014
10.1587/transcom.E97.B.2435
IEICE TRANSACTIONS ON COMMUNICATIONS
Keywords
Field
DocType
cooperative communication, orthogonal frequency division multiplexing (OFDM), wireless local area network (LAN), amplify-and-forward (AF) mode, Golden code, Alamouti code, log likelihood ratio
Likelihood-ratio test,Computer science,Maximum likelihood,Computer network,Wireless lan,Orthogonal frequency-division multiplexing
Journal
Volume
Issue
ISSN
E97B
11
1745-1345
Citations 
PageRank 
References 
0
0.34
19
Authors
5
Name
Order
Citations
PageRank
Hayato Fukuzono161.84
Yusuke Asai25415.85
Riichi Kudo38115.69
Koichi Ishihara43910.89
Masato Mizoguchi58014.45