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The orthogonal frequency division multiplexing (OFDM) is one of the promising technologies to improve the spectral efficiency, enhance system capacity and mitigate inter-symbol interference in the wireless communication system. In this paper, we aim at the study on adaptive modulation and coding technologies for wireless system over frequency selective fading channel. This adaptive allocation algorithm...
This paper proposes a blind modulation detection technique for adaptive orthogonal frequency division multiplexing (adaptive OFDM) communications. Adaptive modulations are applied to improve communication performance in OFDM over complicated multi-path fading channels. This paper proposes a new method which reduces detection errors in blind modulation and improves communication throughput in adaptive...
The changes of surrounding wireless environments have impact on communication quality. Cognitive radio is an attractive technique to follow such changes while classical fixed radio suffers from differences between supposed and actual communication environments. This paper attempts a new concept in OFDM cognitive radio and proposes an environment-adaptive agent system that finds appropriate communication...
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