JP2821436B2 - Mobile communication relay station receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving device for a mobile communication relay station such as a portable telephone system or a personal handyphone system (hereinafter, referred to as PHS).

[0002]

2. Description of the Related Art A conventional technology of a part related to the present invention in a receiving device of a mobile communication relay station will be described with reference to FIG. In the receiving apparatus of the mobile communication relay station, when the power reset signal of FIG. 4 is given to 401 or the synthesizer alarm signal is given to 402, and the receiving channel has not yet been determined, first the synthesizer data read address signal is sent. The first CPU one after another
The counter 403 counts up, sends data corresponding to the count-up address of the internal memory from the terminal 404 to the synthesizer circuit, and switches the receiving channel one after another. Lock and start communication.

When a reception channel is determined and communication is started, a received signal strength indication (hereinafter, referred to as RSSI) signal of a received radio wave that fluctuates with the movement of the mobile station is coded and transmitted from the address terminal 405 to the address terminal 405. Based on the RSSI data input to the second CPU 406 and read out from the 407, switching of a plurality of receivers performing diversity reception, gain adjustment of the receiver, switching of a relay station, and the like are performed. As described above, conventionally, synthesizer data control and RSSI data processing are performed using two C
This was done separately with independent circuits using PU.

[0004]

As described above, conventionally, a synthesizer data control for designating a reception channel and R
Since the SSI data processing is performed in an independent circuit using two CPUs, the number of components is large, a large mounting area is required, and the cost is increased. The present invention has been made in view of such a background, and an object of the present invention is to solve the above-described problem by switching between a single shared circuit for synthesizer data control and RSSI data processing.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a receiver for a mobile communication relay station such as a portable telephone system or a personal handyphone system (hereinafter referred to as a PHS). One read-only memory (hereinafter referred to as ROM) storing both data for processing, a switching circuit for switching an input address of the ROM between a synthesizer control address and an RSSI address, and a ROM for synthesizing output data of the ROM. A mobile communication relay station comprising: a switching circuit for switching between RSSI data processing; and switching means for switching an input switching circuit and an output switching circuit of a ROM to a synthesizer control side by a power reset signal or a synthesizer alarm signal. Provide receiving device I do. According to a second aspect of the present invention, in the mobile communication relay station receiving apparatus according to the first aspect, a synthesizing control circuit for designating a reception channel is operated in a stage where a reception channel is not designated, and Operates the RSSI data processing circuit. According to a third aspect of the present invention, in the receiving apparatus of the mobile communication relay station according to the first or second aspect, when it is necessary to specify a receiving channel, the synthesizer control circuit operates the synthesizing control circuit for a longer time than the synthesizer data transmission time. , A switching signal output means for operating.

[0006]

FIG. 1 is a block diagram showing a configuration of a data storage circuit portion for performing synthesizer control and RSSI data control in a mobile communication relay station receiving apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 101 denotes a power reset signal input terminal, 102 denotes a synthesizer alarm signal input terminal, 103 denotes an OR circuit, 104 denotes a one-pulse generation circuit that defines the operation time of the synthesizer circuit, 10
5 is a synthesizer data address signal input terminal, 10
Reference numeral 6 denotes an RSSI data address signal input terminal. Reference numeral 107 denotes a synthesizer data address input and RSS
I data address input switch, 108 is a ROM storing synthesizer data and RSSI data, 109 is a ROM data output switch,
110 is a synthesizer data output terminal, 111 is R
Represents the output terminal of SSI data.

FIG. 2 is an operation timing chart when a power reset is performed, and FIG. 3 is an operation timing chart when a synthesizer alarm signal is generated.
In the receiving device of the mobile communication relay station, the power reset signal is given to the terminal 101 or the synthesizer alarm signal is issued to the terminal 102 when the receiving channel of the receiving device is not determined. At time t1 in FIG. 2, when a power reset signal is given, a one-pulse generation circuit output that defines the operation time of the synthesizer circuit is sent out, and the changeover switches 107 and 109 in FIG. The signals are sequentially input to the ROM 108 by counting up, the corresponding data is transmitted from the terminal 110 to the synthesizer, and the receiving channels are switched one after another, and the synthesizer is locked at the receiving channel where an empty channel is found at time t2 in FIG. And stop data output. When the reception channel is determined and the output of the one-pulse generation circuit stops at time t3, the changeover switches 107 and 109 switch to the RSSI data side, input the RSSI address signal to the ROM 108, and receive the RSSI data read from the terminal 111. Switching of a plurality of receivers performing diversity reception, gain adjustment of the receiver, switching of a relay station, and the like are performed.

FIG. 3 shows an operation when a synthesizer data alarm signal is generated. When it becomes necessary to select a reception channel at time t1 in FIG. 3, a synthesizer alarm signal is generated, the output of the one-pulse generation circuit is output until time t3, and the reception channel is determined by the same operation as in FIG. Is switched to the RSSI data circuit side. Although the synthesizer alarm signal is transmitted until time t4, no inconvenience occurs because of the circuit operation using the rising edge of the signal. Conventionally, two CPUs are used for synthesizer data control and RSSI data processing.
Are used separately by independent circuits, but it is not necessary to simultaneously perform synthesizer data control and RSSI data processing, and circuits can be shared. As described above, one embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like within a range not departing from the gist of the present invention. Are also included in the present invention. For example, it is also possible to easily replace the ROM, the input / output switching circuit of the ROM, and the one-pulse generation circuit with one CPU.

[0009]

As described above, according to the present invention, in a receiver of a mobile communication relay station such as a portable telephone system or a PHS, a synthesizer control for designating a reception channel and diversity reception are performed. A method of switching between a plurality of receivers, adjusting the gain of the receivers, or performing RSSI data processing for switching the relay station in accordance with the movement of a mobile phone or the like by switching a set of ROM circuits or CPUs is adopted. The effects of simplification, reduction in the number of components, reduction in mounting area, and reduction in cost can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a data storage circuit portion that performs synthesizer control and RSSI data control in a receiving device of a mobile communication relay station according to an embodiment of the present invention.

FIG. 2 shows an operation timing chart when a power reset is applied in the embodiment of FIG. 1;

FIG. 3 is an operation timing chart when a synthesizer alarm signal is generated in the embodiment of FIG. 1;

FIG. 4 is a block diagram showing a configuration of a conventional synthesizer control and RSSI data control circuit portion of a receiving device of a mobile communication relay station.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 101 Power reset signal input terminal 102 Synthesizer alarm signal input terminal 103 OR circuit 104 1 pulse generation circuit 105 Synthesizer data address signal input terminal 106 RSSI data address signal input terminal 107 Synthesizer data address signal and RSSI
Input signal input switch. 108 ROM in which synthesizer data and RSSI data are stored. 109 ROM data output switch. 110 Synthesizer data output pin. 111 RSSI data output terminal.

Claims (3)

(57) [Claims] A receiving device for a mobile communication relay station such as a mobile phone system or a personal handyphone system, a synthesizer control circuit for designating a reception channel, a reception electric field strength data processing circuit; A read-only memory storing both data for reception electric field strength data processing, a switching circuit for switching an input address of the read-only memory to one of a synthesizer control address and a reception electric field intensity data address, A switching circuit for switching output data between synthesizer control and received electric field intensity data processing; and a synthesizer control of the input switching circuit and the output switching circuit of the read-only memory by a power reset signal or a synthesizer alarm signal. Receiver of the mobile communication relay station, characterized by comprising a switching means for switching to. 2. When a power reset signal or a synthesizer alarm signal is issued, the synthesizer control circuit for designating a reception channel is operated, and after the operation of the synthesizer control circuit is completed, the reception electric field intensity data processing circuit is operated. The receiving device of a mobile communication relay station according to claim 1, wherein 3. A synthesizer control circuit comprising: a synthesizer control circuit;
3. The receiving device for a mobile communication relay station according to claim 1, further comprising a switching signal output unit that operates for a time longer than the data transmission time.