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Article: New wireless communications findings from S.K. Wilson and co-researchers published.
- Article from:
- Network Weekly News
- Article date:
- October 5, 2009
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According to recent research from the United States, "This paper introduces a new constellation mapping scheme for asymmetrically-clipped optical OFDM (ACO-OFDM) that puts more bits on the low-frequency subcarriers. The low-pass nature of the wireless optical channel motivates the use of this generic bit-loading scheme."
"This scheme has no knowledge of the channel at the receiver; it performs significantly better than the traditional constant constellation mapping on all subcarriers in a variety of channels. The average bit-error rate (BER) curves for the new modulation scheme have up to a 5 dB improvement for signal-to-noise ratios (SNRs) where the BER is in ...