Patent · US Active

EVM pooling for multi-standard and multi-carrier systems

US8885764B2 · kind B2 · utility

2Cited by

0References

26Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Robert Baldemair · Solna, SE
Ali Behravan · Stockholm, SE
Farshid Ghasemzadeh · Sollentuna, SE
Daniel Larsson · Stockholm, SE

Key dates

Filing date	May 3, 2010
Grant date	Nov 11, 2014
Priority date	—
Expiry date	Nov 20, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04L27/2618
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Error vector magnitude (EVM) is pooled and adaptively distributed among carriers in a multi-standard or multi-carrier system to reduce peak to average power ratios (PAPR) without exceeding EVM limits. Correction tone injection is used to reduce PAPR. The amplitude of each correction tone, and number of correction tones assigned to a carrier, are adjusted to control the EVM and out-of-band distortion of each carrier, to comply with EVM limits imposed by the respective radio access technology.

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