Radio apparatus with diversity antennas
First Claim
Patent Images
1. A radio apparatus comprising:
- a plurality of receiving systems connected to multiple antennas providing diversity, respectively, each receiving system comprising;
an antenna terminator for terminating a corresponding antenna of the multiple antennas, the antenna terminator being selectively active and inactive; and
a path control switch for selectively switching on and off to provide a path for a radio signal received by the corresponding antenna;
a discriminator for discriminating one receiving system from other receiving systems based on radio signals received by the receiving systems, respectively; and
a controller for simultaneously coordinating the control of the plurality of receiving systems such that a first antenna terminator of the one receiving system is inactive and a corresponding first path control switch is on and a second antenna terminator of each of the other receiving systems is active and corresponding second path control switches are off.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio apparatus includes a plurality of receiving systems connected to multiple antennas providing diversity, respectively, each receiving system including an antenna terminator and a preamplifier. After one receiving system is discriminated from another receiving system based on radio signals received by the receiving systems, respectively, a controller controls the one receiving system such that an antenna terminator is inactive and a preamplifier is active and, at the same time, further controls the other receiving system such that an antenna terminator is active and a preamplifier is inactive.
21 Citations
22 Claims
-
1. A radio apparatus comprising:
-
a plurality of receiving systems connected to multiple antennas providing diversity, respectively, each receiving system comprising; an antenna terminator for terminating a corresponding antenna of the multiple antennas, the antenna terminator being selectively active and inactive; and a path control switch for selectively switching on and off to provide a path for a radio signal received by the corresponding antenna; a discriminator for discriminating one receiving system from other receiving systems based on radio signals received by the receiving systems, respectively; and a controller for simultaneously coordinating the control of the plurality of receiving systems such that a first antenna terminator of the one receiving system is inactive and a corresponding first path control switch is on and a second antenna terminator of each of the other receiving systems is active and corresponding second path control switches are off. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A radio receiver comprising:
-
first and second antennas providing spatial diversity; a first receiving system comprising; a first antenna terminator for terminating the first antenna, the first antenna terminator being selectively active and inactive; and a first preamplifier for amplifying a radio signal received by the first antenna, the first preamplifier being selectively active and inactive; a second receiving system comprising; a second antenna terminator for terminating the second antenna, the second antenna terminator being selectively active and inactive; and a second preamplifier for amplifying a radio signal received by the second antenna, the second preamplifier being selectively active and inactive; a level detector for detecting first and second signal levels from first and second radio signals received by the first and second receiving systems, respectively; a comparator for comparing the first and second signal levels to determine one receiving system which provides a higher signal level; and a controller for simultaneously coordinating the control of the first and second receiving systems such that an antenna terminator of the one receiving system is inactive and a corresponding preamplifier is active and an antenna terminator of the other receiving system is active and a corresponding preamplifier is inactive thereby producing an amplified radio signal from the one receiving system to be used as a received signal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. In a radio apparatus comprising a plurality of receiving systems connected to multiple antennas providing diversity, respectively, each receiving system comprising:
-
an antenna terminator for terminating a corresponding antenna of the multiple antennas, the antenna terminator being selectively active and inactive; and a path control switch for selectively switching on and off to provide a path for a radio signal received by the corresponding antenna, a control method for the radio apparatus, comprising the steps of; a) discriminating one receiving system from other receiving systems based on radio signals received by the receiving systems, respectively; and b) simultaneously coordinating the control of the plurality of receiving systems such that a first antenna terminator of the one receiving system is inactive and a corresponding first path control switch is on and a second antenna terminator of each of the other receiving systems is active and corresponding second path control switches are off. - View Dependent Claims (17, 18, 19)
-
-
20. In a radio receiver comprising:
-
first and second antennas providing spatial diversity; a first receiving system comprising; a first antenna terminator for terminating the first antenna, the first antenna terminator being selectively active and inactive; and a first preamplifier for amplifying a radio signal received by the first antenna to produce a first amplified radio signal, the first preamplifier being selectively active and inactive; a second receiving system comprising; a second antenna terminator for terminating the second antenna, the second antenna terminator being selectively active and inactive; and a second preamplifier for amplifying a radio signal received by the second antenna to produce a second amplified radio signal, the second preamplifier being selectively active and inactive, a method for receiving a radio signal, the method comprising the steps of; detecting first and second signal levels from first and second amplified radio signals received by the first and second receiving systems, respectively; comparing the first and second signal levels to determine one receiving system which provides a higher signal level; simultaneously coordinating the inactivation of both an antenna terminator of the one receiving system and a preamplifier of the other receiving system and the activation of both an antenna terminator of the other receiving system and a preamplifier of the one receiving system to produce an amplified radio signal from the one receiving system; and receiving the amplified radio signal as the radio signal to be received. - View Dependent Claims (21, 22)
-
Specification