Patent · US Expired

Code-rate increased compressed mode DS-CDMA systems and methods

US5883899A · kind A · utility

86Cited by

17References

40Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Erik Dahlman · Stockholm, SE
Per Willars · Stockholm, SE
Olof E. Grimlund · Hässelby, SE
Lars-Magnus Ewerbring · Stockholm, SE

Key dates

Filing date	Apr 23, 1996
Grant date	Mar 16, 1999
Priority date	—
Expiry date	Apr 23, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH04W52/44
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Introduction of discontinuous transmission in CDMA communications techniques is achieved by using selectively puncturing coded output of a convolutional encoder. By temporarily increasing the coding rate during a frame, information only fills an information part of a frame in a compressed mode, leaving an idle part of the frame in which to perform other functions, such as evaluation of other frequencies for use in handover between frequencies.

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