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 Ration (SNR) as low as 7dB for achieving an perceptually pleasing video quality.
展开▼
