W. Hwang’s scientific contributions

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Publications (1)

Subchannel power control in the OFDM system to improve BER performance under multipath channels
  • Article

May 2002

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3 Reads

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7 Citations

IEICE Transactions on Communications

HK Kang

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W. Hwang

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K. Kim

We propose a subchannel power control scheme in the OFDM system, which transmits data with a variable power level for each subchannel based on the received SNR. The OFDM system, employing the D-QPSK modulation and the proposed subchannel power control with a grouping coefficient equal to 3, gives about 2.3dB gain in Eb/N0 comparing with the conventional OFDM system, under the two-ray multipath channel with the mean value of the second-ray's attenuation coefficient equal to 0.25, for the required BER equal to 10-5.

Citations (1)

... The n bitstreams are allocated to the n transmitted antennae according to the feedback of the channel state information. The most important feature of the adaptive antenna selection transmission scheme is that each bitstream switch can be transmitted over a proper subchannel among multiple antennae [19,20]. The adaptive antenna selection-MIMO system is based on the channel state information. ...

Reference:

An Adaptive Asymmetric Transmission Scheme for MPEG-4/SVC Signals in MIMO-OFDM System
Subchannel power control in the OFDM system to improve BER performance under multipath channels
  • Citing Article

  • May 2002

IEICE Transactions on Communications

HK Kang

·

W. Hwang

·

K. Kim