US 6,188,447 B1 · Frequency diversity system

Abstract

A frequency diversity system for use in mobile reception of television and RF signals in the meter or decimeter wavelength, such as for use with a mobile television having a first receiver, an additional receiver and a control and analysis circuit. The additional receiver detects all incoming frequencies corresponding to a preset program and switches the main receiver to an incoming frequency of a higher quality. The receiver is able to identify the frequencies corresponding to the desired program through a transmitter identification code, which is added to each signal. This code is usually a VPS identification signal. The control and analysis circuit compares the incoming frequencies to the frequency of the signal transmitted by the television receiver to determine the highest quality signal. In order to accelerate the process, the system processes local position coordinates of the television so that the frequencies analyzed are only those expected within the coverage area of the television.

Claims8

Dependent claims

A frequency diversity system for RF and television signal reception from an antenna in the meter or decimeter wavelength range for use with a mobile television having a main receiver connected to the antenna for showing via its monitor, the selected program comprising:

a second receiver connected to the antenna and adapted to detect different signal frequencies of the selected program, said second receiver having means for identifying the selected program from frequencies of other programs;
a control circuit coupled to said main receiver and said second receiver for comparing the signal reception quality of said receivers and generating a control pulse in response to the signal quality;
switch means having its input coupled to said receivers and its output coupled to the television monitor, and having its trigger circuit coupled to said control circuit for switching the monitor between said main and said second receiver in response to said control pulse;
wherein said control circuit has preset operating thresholds for a selected quality reception and said control circuit processes local position co-ordinates of the television so that the frequencies analyzed are only those expected within the reception coverage area of the television in order to prevent the main receiver from switching between frequencies of approximately equal quality.

1 more element

Dependencies are inferred from the claim text.

Frequency diversity system

Life of this patent

Frequency diversity system

Life of this patent

Abstract

Claims8