## Abstract

The Gaussian approximation is widely used as a simple method of derivation for the average bit-error rate in direct-sequence spread-spectrum communications. The Gaussian approximation cannot always derive the bit-error rate with high accuracy since the accuracy tends to be degraded with the increase of E_{b}/N_{0} when the number of interference symbols is low. This article proposes a method of theoretical analysis in which the probability density function for the composite amplitude of the interference signal is derived by faithfully following the signal processing executed in the spread-spectrum communication system, after which the bit-error rate is derived. The validity of the method is demonstrated by verifying that the bit-error rate obtained by the proposed method agrees well with the value obtained by computer simulation.

Original language | English |
---|---|

Pages (from-to) | 57-64 |

Number of pages | 8 |

Journal | Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi) |

Volume | 83 |

Issue number | 5 |

Publication status | Published - 2000 |

## Keywords

- Band-limiting
- Bit-error rate
- Direct sequence spreading
- Probability density function
- Spread-spectrum communications

## ASJC Scopus subject areas

- Computer Networks and Communications
- Electrical and Electronic Engineering