2D Markovian SS codes flatten time-frequency distribution of signals in asynchronous Gabor division CDMA systems

We propose a Gabor division (GD)-CDMA system which permits time and frequency offsets. Negatively correlated time- and frequency-domain spreading codes have shown to reduce the variances of mutual- and self-interferences. In this paper, we show that such negatively correlated spreading codes have another important property that they flatten the time-frequency energy distributions of signals in GD-CDMA system.

• Type: Journal
• Year: 2011
• Where: ICASSP
• Authors: Tohru Kohda, Yutaka Jitsumatsu, Kazuyuki Aihara
• Keywords: Correlated Spreading Codes, Frequency-domain Spreading Codes, ICASSP 2011, Signal Processing, Spreading Codes