An adaptive MIMO transmission technique for LDPC coded OFDM cellular systems

Kwang Soon Kim, Yun Hee Kim, Jae Young Ahn

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


In this paper, an adaptive MIMO transmission scheme using QAM and LDPC code is proposed for an OFDM cellular system employing FDD. By approximating the LLR distribution to a Gaussian distribution, only two parameters, the mean and the normalized standard deviation, are required to be sent to the transmitter, which requires only a few more bits than those required in currently used single carrier cellular systems, such as cdma2000-1x EV-DO. It is shown by computer simulation that the proposed adaptive transmission scheme can provide up to 2 - 3dB gain over the conventional system using the mean SNR only, at the expense of only 3 more bits in the feedback information.

Original languageEnglish
Pages (from-to)761-764
Number of pages4
JournalIEEE Vehicular Technology Conference
Issue number2
Publication statusPublished - 2004
Event2004 IEEE 59th Vehicular Technology Conference, VTC2004-Spring: Towards a Global Wireless World - Milan, Italy
Duration: 2004 May 172004 May 19

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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