Patent · US Expired

Diversity radio receiver for use with multiple antenna, particularly car radio

US4939791A · kind A · utility

29Cited by

5References

4Claims

0Family size

Assignee

Blaupunkt-Werke GmbH · DE

Inventors

Harald Bochmann · Hannover, DE
Kurt Wiedemann

Key dates

Filing date	Oct 4, 1988
Grant date	Jul 3, 1990
Priority date	—
Expiry date	Oct 4, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH04B7/0851
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

To increase the fidelity of radio reception in a moving receiver, for example a car radio, the signals received from various antennas on the radio are mixed with a carrier in the receiver, and the resulting mixed signals, directly and 90.degree. phase-shifted, are added to a summing signal, in which, additionally, the phase positions of the direct and 90.degree. phase-shifted signals are changed in dependence on the phase difference between the respective intermediate frequency mixed signal and the overall summed signal in a direction to maximize the summed signal (u.sub.s).

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