Stochastic Method of Determining Substream Modulation Levels for MIMO Eigenbeam Space Division Multiplexing
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Abstract
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Multiple-input multiple-output (MIMO) eigenbeam space division multiplexing that uses adaptive modulations for substreams is a promising technology for improving transmission capacity. A fundamental drawback of this approach is that the modulation levels determined from the carrier-to-noise ratio at each substream are sometimes overly optimistic so the use of these modulation levels results in transmission errors and diminished transmission performance. A novel method of determining substream modulation levels is proposed that alleviates this degradation. In the proposed method, the expected bit error rates for possible modulations of each substream are calculated from delay profiles. Simulation results indicate that transmission capacity is improved by 30% using the new method compared with the conventional method.
Journal
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- IEICE Transactions on Communications
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IEICE Transactions on Communications E89-B (1), 142-149, 2006-01-01
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
- 1050859536460180992
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- NII Article ID
- 110003488265
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- NII Book ID
- AA10826261
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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