Diversity reception radio receiver

Claim 2

A diversity reception radio receiver having: a two-receiver system having first and second receivers for responding to electromagnetic signal waves; wave envelope detector means associated with each receiver for generting an output voltage corresponding to the strength of an electromagnetic signal wave picked up by its associated receiver; hysteresis comparator means for comparing the outputs of the two wave envelope detectors and for generating a switching control signal in response thereto, said hysteresis comparator means changing a threshold level of change in response to the strength of one of the outputs of the two wave envelope detectors; and switching means responsive to the switching control signal for selecting between first and second recovered signals respectively produced by the first and second receivers, whereby switching between said first and second recovered signals occurs only after the compared outputs reach said threshold level of change.

Claim 3

A diversity radio receiver system comprising: first and second reception channels extending to output means, each of said channels comprising at least a receiver and an individually associated antenna; comparator means for comparing the strength of received signals in said two channels, said comparator means having a threshold level of resistance to chaange and changing said threshold level in response to the strength of one of the received signals; and first switching means responsive to said compared signals reaching said threshold level for selecting the channel having the stronger signal and for applying the output of said selected channel to said output means.

Claim 4

A diversity radio receiver system comprising: first and second reception channels extending to output means, each of said channels comprising at least a receiver and an individually associated antenna; comparator means for comparing the strength of received signals in said two channels, said comparator means having a threshold level of resistance to chaange and changing said threshold level in response to the strength of one of the received signals; and first switching means responsive to said compared signals reaching said threshold level for selecting the channel having the stronger signal and for applying the output of said selected channel to said output means.

Claim 5

The diversity receiver of claim 2 and wave envelope detector means associated with each of said channels for generating an output voltage which is representative of the strength of signals in the respective channels.

Claim 6

The diversity receiver of claim 3 and signal switching means for selectively applying signals from either one of said receivers to a control input of said comparator, and means for simultaneously applying switching control signals from said comparator means to both said first and said signal switching means.

Claim 7

The diversity receiver of claim 4 and integrator means coupled to smooth signals passing through said signal switching means to provide an average voltage which is representative of the strength of said signal.

Claim 8

The diversity receiver of claim 5 and logic circuit means responsive to said inegrator means for measuring the level of signals in order to generate the threshold level for said comparator means.

Claim 9

The diversity receiver of claim 5 and means responsive to said integrator means for converting said received signals into digital signals, and means responsive to said digital signals for controlling said signal switching means.

Claim 10

A diversity radio receiver system comprising: first and second reception channels extending to output means, each of said channels comprising at least a receiver and an individually associated antenna; wave envelope detector means associated with each of said channels for generating an output voltage which is representative of the strength of signals in the respective channels; comparator means for comparing the strength of received signals in said two channels, said comparator means having a threshold level of resistance to change; first switching means responsive to said compared signals reaching said threshold level for selecting the channel having the stronger signal and for applying the output of said selected channel to said output means; signal switching means for selectively applying signals from either one of said receivers to a control input of said comparator; and means for simultaneously applying switching control signals from said comparator means to both said first and said signal switching means.

Claim 11

A diversity radio receiver system comprising: first and second reception channels extending to output means, each of said channels comprising at least a receiver and an individually associated antenna; wave envelope detector means associated with each of said channels for generating an output voltage which is representative of the strength of signals in the respective channels; comparator means for comparing the strength of received signals in said two channels, said comparator means having a threshold level of resistance to change; first switching means responsive to said compared signals reaching said threshold level for selecting the channel having the stronger signal and for applying the output of said selected channel to said output means; signal switching means for selectively applying signals from either one of said receivers to a control input of said comparator; and means for simultaneously applying switching control signals from said comparator means to both said first and said signal switching means.

Claim 12

The diversity receiver of claim 8 and integrator means coupled to smooth signals passing through said signal switching means to provide an average voltage which is representative of the strength of said signal.

Claim 13

The diversity receiver of claim 9 and logic circuit means responsive to said integrator means for measuring the level of signals in order to generate the threshold level for said comparator means.

Claim 14

The diverstiry receiver of claim 9 and means responsive to said integrator means for converting said received signals into digital signals, and means responsive to said digital signals for controlling said signal switching means.