Patent · US Expired

Method and apparatus for implementing PN masks for a truncated M-sequence

US6246676A · kind A · utility

46Cited by

4References

23Claims

0Family size

Assignee

Motorola, Inc. · US

Inventors

Jiangnan Jason Chen · Hawthorn Woods, US
Yuda Luz · Prairie View, US
Ron Rotstein · Arlington Heights, US

Key dates

Filing date	Dec 13, 1999
Grant date	Jun 12, 2001
Priority date	—
Expiry date	Dec 13, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH04J13/0074
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Method and apparatus to provide a pseudo random noise (PN) sequence having a particular code phase offset for use in a radio in a Code Division Multiple Access (CDMA) radio system (100). In one embodiment, a first mask (320) is applied to shift a reference PN sequence to the assigned PN code phase (416). Upon reaching the end of the reference PN sequence, the initial state is reloaded (420) into the PN generator state register to reset the state value to its initial value, thereby producing a cyclical sequence. In a second embodiment, a first mask (622) and a second mask (624) are applied to the reference sequence produced by the PN generator state registers (620) to produce the appropriate portions of the output sequence.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.