JPH06188790A - Diversity receiving device - Google Patents

Abstract

PURPOSE:To obtain the diversity receiving device which prolongs the life of a battery by reducing its current consumption. CONSTITUTION:Two switches 5a and 5b are provided between the power source 6 and 1st and 2nd receiving circuits 3 and 4. In incoming signal wait mode, only one of the switches 5a and 5b is turned ON and OFF intermittently with the control signal from a CPU 11. Consequently, the current consumption of the battery 6 is reduced and its life is prolonged. When the device is in bad reception environment or when an incoming number is different by less than the specific number of digits, said switches 5a and 5b are both turned ON for switching to diversity reception, so the success rate of termination is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diversity receiver, and more particularly to a mobile receiver which achieves low power consumption and a long battery life.

[0002]

2. Description of the Related Art First, a schematic configuration of a diversity receiving apparatus used in a conventional radio receiver will be described with reference to FIG.
Will be described with reference to the block diagram of FIG.

In the figure, 1 is a first antenna, 2 is a second antenna, 3 is a first receiving circuit, and 4 is a second receiving circuit. A battery 6 as a power source is connected to these receiving circuits 3 and 4 via a single switch 5.

The outputs of the receiving circuits 3 and 4 are supplied to an amplifier 8 and a speaker 9 via a changeover switch 7.
Reference numeral 10 denotes a comparator, which determines the strength of the received signals of the receiving circuits 3 and 4, and controls the changeover switch 7 so as to connect the larger receiving circuit to the amplifier 8. A CPU 11 generates and outputs a control signal or the like for turning on and off the switch 5.

When the main switch of the diversity receiving device is turned on, the diversity receiving device first enters the receiving state and receives the information regarding the call timing transmitted from the base station to the mobile station. Based on the timing information, the CPU 11 generates an incoming timing signal during standby for turning on / off the switch 5 at a constant cycle, in other words, a signal indicating the timing when the own station is called from the base station. This incoming timing signal is sent to the switch 5 to control ON / OFF of the switch 5. Therefore, the diversity receiver operates in the intermittent reception mode.

At the time of reception, the switch 7 selects the receiving circuit having the better reception state at all times by the output signal of the comparator 10. The audio signal received by the receiving circuit is amplified by the amplifier 8 and output as audio from the speaker 9.

FIG. 6 is a flowchart showing the above-mentioned operation. First, the incoming call timing information from the base station is received, and the timing of its own incoming frame is detected (step S1). Then, the standby operation is started. During standby, the switch 5 is turned off in the power saving mode (step S2). Next, it is judged whether or not the incoming frame of the own station is reached (step S3), and when the incoming frame of the own station is reached, the process proceeds to step S4 and the switch 5 is turned on.

Next, the reception strength of the first receiving circuit 3 [R
X3] or the reception strength [RX4] of the second receiving circuit 4 is larger (step S5). If the former is larger, the process proceeds to step S6, and the switch 7 is set to the first position. 1 is connected to the receiving circuit 3. On the other hand, if the latter is large, the process proceeds to step S7, and the switch 7 is connected to the second receiving circuit 4.

In step S8, it is determined whether or not the incoming call is determined. If the incoming call is not determined, the process proceeds to step S9, and it is determined whether or not the own incoming frame has ended. On the other hand, when the incoming call is determined in step S8, the process proceeds to the incoming call process in step S10.

When step S9 is negative, the process returns to step S5 and the operations of steps S5 to S8 are repeated. When step S9 becomes affirmative, the process returns to step S2 to enter the power saving mode again.

[0011]

As shown in the drawing, the conventional diversity receiving apparatus has the above-mentioned step S4.
When the switch 5 is turned on, the two receiving circuits 3 and 4,
The battery 6 is connected to the.

Therefore, when waiting for an incoming call, the switch 5
When is turned on intermittently, the battery 6 supplies power to the receiving circuits 3 and 4 at the same time, resulting in a problem that the current consumption increases, and as a result, the life of the battery becomes short.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned problems of the prior art, to provide a diversity receiver in which the battery current consumption is reduced and the service life thereof is extended.

Another object is to provide a diversity receiver which does not reduce the success rate of incoming calls.

[0015]

In order to achieve the above object, the invention of claim 1 is a diversity receiving apparatus for selectively receiving the stronger one of the signals received by the first and second receiving circuits. A battery serving as a power source for the first and second receiving circuits, first and second switches connected between the battery and the first and second receiving circuits, and the first and second switches connected to the first and second receiving circuits when waiting for an incoming call. It is characterized in that it is provided with a control means for outputting a control signal for intermittently turning on one of the first switch and the second switch.

[0016] According to a second aspect of the present invention, the control means is configured such that, when the incoming call information error rate is larger than a predetermined value, or when the difference between the incoming call numbers is a predetermined number of digits or less, the first and second aspects.
The feature is that the other switch is turned on to perform diversity reception.

[0017]

According to the first aspect of the present invention, when waiting for an incoming call, the battery only supplies power to one of the first and second receiving circuits. Therefore, the current consumption of the battery is reduced. The life can be extended.

Further, according to the invention of claim 2, when the reception environment is bad or when the difference in the called number is less than a predetermined digit number, the diversity reception is switched, so that the success rate of the incoming call can be improved. it can.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a diversity receiver according to an embodiment of the present invention.

The characteristic feature of this embodiment is that each of the power supply circuits of the first receiving circuit 3 and the second receiving circuit 4 has
The switches 5a and 5b are connected, the operation of the comparison circuit is stopped, and the control of the switch 7 when the operation of the comparison circuit is stopped is added, and other configurations are the same as or equivalent to those in FIG.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, it receives the incoming call timing information from the base station and detects the timing of its own incoming frame (step S11). Then, the standby operation is started. In standby mode, power saving mode
Both the switches 5a and 5b are turned off (step S
12). Then, it is judged whether or not it is the incoming frame of the own station (step S13), and when it is the incoming frame of the own station, the process proceeds to step S14, the switch 5a is turned on, and the changeover switch 7 is set to the first receiving circuit. Connect to RX3.

Next, in step S15, it is judged whether or not the incoming call information error rate is K% (eg, K = 30) or more. When this determination is negative, the process proceeds to step S16, and the difference from the mobile station number is k digits (for example, k = 1).
It is determined whether or not the following. If the difference between the numbers is larger than k digits, the own station has not received a call, and the process proceeds to step S22. In step S22,
It is judged whether or not your incoming frame has ended,
If this determination is affirmative, the process returns to step S12 and the above-described processing is repeated.

If the determination in step S15 is affirmative, it may be assumed that the reception environment is bad due to fading or the like, so that reliability is a problem when only one reception circuit is used. If step S16 is affirmative, that is, if the number difference is less than or equal to k digits, the number difference is determined only by the reception of the first receiving circuit 3, so that the reliability is low and it is true that It can also be a number.

Therefore, in the above case, that is, step S
If the determination in 15 or S16 is affirmative, step S
Proceeding to 17, the switch 5b is turned on to switch to diversity reception.

Then, in step S18, the strength [RX3] of the reception signal of the first reception circuit 3 and the strength [RX4] of the reception signal of the second reception circuit 4 are compared, and step S19 or In S20, the receiving circuit having the larger strength is selected.

As a result, the determination of the incoming call determination in step S21 can be made by using the diversity reception, and the weak point that the incoming call waiting of this embodiment is performed by only one receiving circuit can be reinforced. it can.

As is apparent from the above description, according to this embodiment, as shown in FIG.
Since only the switch 5a is turned on and off at a constant cycle and the switch 5b is kept off, consumption of the battery 6 can be reduced and the life of the battery 6 can be extended.

In addition, since diversity reception is not performed during the standby, there is a possibility that the success rate of incoming calls may decrease. However, in this embodiment, the processing of steps S15 to S21 is provided and the network function is performed as described later. Since it is improved, the success rate can be improved rather than the conventional one, instead of being decreased.

Next, the operation of calling a mobile station from the network (base station) will be described with reference to the flowchart of FIG.

When the calling of the mobile station is started (step S31), the process proceeds to step S32, and the number of calling times n is set. That is, n = N (for example, N = 4) is set.

When the predetermined call timing of the mobile station M arrives (Yes in step S33), the process proceeds to step S34, and the calling information including the called number is transmitted. Step S35
Then, 1 is subtracted from N and the process proceeds to step S36. In step S36, it is determined whether or not there is an incoming call response from the mobile station.

If the determination in this step is negative, the process proceeds to step S37 and it is determined whether or not N = 0. When this determination is negative, the process returns to step S33, and it is again determined whether or not the calling timing of the mobile station M has come. When the calling timing comes, the operations from step S34 onward are repeated.

By the above operation, when it is determined in step S36 that there is an incoming call response, the process proceeds to step S38 to enter the call connection sequence. On the other hand, if it is determined in step S37 that the number of calling times N has become 0, the process proceeds to step S39 to shift to the incoming call failure sequence. That is, it is determined that the mobile station is powered off or out of range, and the incoming call failure sequence is performed.

When the diversity receiver of the present invention is put into practical use, it is preferable that the number of times of calling n be larger than the number of times of the related art. For example, if the conventional method is n = 3, n = 4 may be set.

[0035]

As is clear from the above description, according to the present invention, the battery is intermittently connected to only one receiving circuit when waiting for an incoming call, so that the life of the battery is prolonged. The effect is that you can.

Further, when the reception environment is bad, or when the difference in the called number is less than the predetermined digit number, the mode is switched to the diversity reception, so that the success rate of the incoming call can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart illustrating the operation of this embodiment.

FIG. 3 is a timing chart illustrating an operation of a switch connected between a battery and a receiving circuit.

FIG. 4 is a flowchart showing the operation of the network.

FIG. 5 is a block diagram of a conventional device.

FIG. 6 is a flowchart illustrating the operation of a conventional device.

[Explanation of symbols]

1, 2 ... First and second antennas, 3, 4 ... First and second receiving circuits, 5a, 5b ... Switch, 6 ... Battery, 7 ... Changeover switch, 10 ... Comparator, 11 ... CPU

Claims (2)

[Claims] 1. A diversity receiving apparatus for selectively receiving the stronger one of the signals received by the first and second receiving circuits, a battery serving as a power source for the first and second receiving circuits, and the battery. First and second switches connected to each of the first and second receiving circuits, and when waiting for an incoming call, one of the first and second switches is intermittently turned on. And a control means for outputting a control signal for controlling the diversity reception device. 2. The control means turns on the other of the first and second switches when the incoming call information error rate is larger than a predetermined value or when the difference between the called numbers is a predetermined number of digits or less, A diversity receiving device characterized by performing diversity reception.