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 an...

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Bibliographic Details
Main Authors: Kohda, Tohru, Jitsumatsu, Yutaka, Aihara, Kazuyuki
Format: Conference Proceeding
Language:English
Subjects:
Ambiguity function
CDMA
Frequency conversion
interference
Markov processes
Multiaccess communication
RNA
Spread Spectrum code
Time and frequency offsets
Time frequency analysis
Timing
Online Access:Request full text
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Summary: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.
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2011.5946687