Anzeige
Erschienen in:
2012 | OriginalPaper | Buchkapitel
Throughput Improvement in Mobile OFDM System with Pilot Free Adaptive Modulation
verfasst von : K. Vinoth Babu, G. Ramachandra Reddy, Sunit Gupta, Pratul Chauhan, Pratik Patel
Erschienen in: Global Trends in Computing and Communication Systems
Verlag: Springer Berlin Heidelberg
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Orthogonal Frequency Division Multiplexing (OFDM) is an emerging multicarrier modulation scheme, which has been adapted for several wireless local area network (WLAN) systems and IEEE 802.16a (WIMAX) systems. The quality of service and performance sensitivity of different wireless services varies according to the channel, so the conventional OFDM is unsatisfactory. In this paper, we introduce an adaptive modulation scheme in association with OFDM systems. By using different modulation techniques we can send variable number of bits per symbol depending on the channel quality to achieve better throughput. We also remove the pilot bits from the transmitted data to increases the bandwidth efficiency. We propose a method to estimate the channel quality and Signal-to-Noise ratio (SNR) directly, without using any pilot bits.