Differential Modulated Pilot Symbol Assisted Adaptive OFDM for Reducing the MLI with Predicted FBI
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Abstract
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In an AMS/OFDM system, base station is in control of the modulation level of each subcarriers, and then, adaptive modulated packet is transmitted from the base station to the mobile station. In this case, the mobile station is required the modulation level information (MLI) to demodulate the received packet. The MLI is generally transmitted as a data symbol, therefore, the throughput is degraded. Moreover, it is necessary to have some transmission delay times and the processing time to make an adaptive modulation command (AMC) using feedback information (FBI). With the FBI delay and processing time, the system performance might be degraded. To reduce these problems, in this paper, we propose a differential modulated pilot symbol assisted adaptive OFDM for reducing the MLI with predicted FBI.
Journal
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- IEICE Transactions on Communications
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IEICE Transactions on Communications E88-B (2), 436-442, 2005-02-01
電子情報通信学会(IEICE)
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Details 詳細情報について
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- CRID
- 1050578061483508224
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- NII Article ID
- 110003222664
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- NII Book ID
- AA10826261
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- ISSN
- 09168516
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- CiNii Articles