Skip to Main Content
A space-time spreading (STS) assisted near-instantaneously adaptive quadrature amplitude modulated (AQAM) multi-carrier CDMA (MC-DSCDMA) video transceiver is proposed and investigated. When the STS scheme is invoked for spreading the signal of each sub-carrier to multiple transmit antennas, the effects of channel-induced fading are substantially mitigated. Furthermore, turbo convolutional coding is invoked for enhancing the achievable BER versus SNR performance. The AQAM-aided STS MC-CDMA system was capable of maintaining a near-constant target BER and hence a near-constant video PSNR across a wide range of channel qualities, requiring a signal-to-noise ratio (SNR) as low as 7dB for achieving a perceptually pleasing video quality.
Date of Conference: 2004