### Abstract

We give a quadratic form expression of the mean squared multiple-access interference (MAI) averaged over relative time delays for chip-asynchronous DS/CDMA systems. A lower bound on the mean squared MAI is referred to as chip-asynchronous version of Welch bound, which depends on chip pulse shapes. Real analysis tells us that a pair of rectangular and sine functions is one of Fourier transform and its inverse Fourier transform and vice versa. On the other hand, Gaussian pulses have the self-duality property. Gaussian chip pulses sacrifice inter-symbol interference, however, they give smaller mean squared MAI, as well as lower bit error rate, than the conventional Nyquist pulses.

Original language | English |
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Title of host publication | Sequences and Their Applications, SETA 2006 - 4th International Conference, Proceedings |

Publisher | Springer Verlag |

Pages | 351-363 |

Number of pages | 13 |

ISBN (Print) | 3540445234, 9783540445234 |

Publication status | Published - Jan 1 2006 |

Event | 4th International Conference on Sequences and Their Applications, SETA 2006 - Beijing, China Duration: Sep 24 2006 → Sep 28 2006 |

### Publication series

Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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Volume | 4086 LNCS |

ISSN (Print) | 0302-9743 |

ISSN (Electronic) | 1611-3349 |

### Other

Other | 4th International Conference on Sequences and Their Applications, SETA 2006 |
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Country | China |

City | Beijing |

Period | 9/24/06 → 9/28/06 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Theoretical Computer Science
- Computer Science(all)

### Cite this

*Sequences and Their Applications, SETA 2006 - 4th International Conference, Proceedings*(pp. 351-363). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 4086 LNCS). Springer Verlag.