Space-time coding is a promising channel coding technique for wireless communications. Combined with antenna diversity, space-time coding can provide improved performance while maintaining the same data transmission rate, which makes it an attractive candidate for high-data-rate transmission systems such as orthogonal frequency division multiplexing (OFDM) systems. In this paper, we compare the performance of space-time coded OFDM systems with that of OFDM systems defined by IEEE 802.11a over AWGN channels and slow fading channels. Although space-time block coding does not have coding gain, it can be used as an inner coding method to obtain diversity gain. Space-time trellis coding obtains 1 dB coding gain and 9 dB diversity gain.
['Jiang Yue', 'Jerry D. Gibson']
Performance of OFDM systems with space-time coding