JPS6077540A - Digital mobile radio equipment - Google Patents

Abstract

PURPOSE:To eliminate the need for the remembrance of a number of a scramble pattern by allowing automatically a scrambler to select the scramble pattern corresponding to a designated channel number. CONSTITUTION:In providing an automatic changeover mode number, e.g., 160 to a switch 26''' and designating the channel number by a switch 24', the scramble pattern number predetermined in response to the channel number is stored in a memory 25' by an address signal transmitted via a converting circuit 28 and an address circuit 27. When the switch 26''' is switched to the automatic changeover mode number 160, a signal converted into a binary-coded hexadecimal number BCHD is transmitted from a converting circuit 32, this signal is detected by a detector 35, an output of the converting circuit 32 is switched into an output of the memory 25' by the said detection output and the scramble pattern corresponding to the designated channel number is selected automatically by the scrambler 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a digital transfer system that specifies a channel number to be used for each region, for example, and changes a scrambling pattern corresponding to each channel number every day, for example. The present invention relates to a digital mobile radio device that can automatically select a scrambling pattern corresponding to a channel number when a channel number is specified using a channel number changeover switch (second changeover switch).

(b) Prior Art and Problems FIG. 1 is a block diagram of a conventional digital mobile radio device, and FIG. 2 shows the switches 24, 26 . 3 is a detailed diagram of the scrambler 9. FIG.

In the figure, 1 is the antenna, 2 is the antenna changeover switch, 3 is the power increaser 11, and 4.13 is the high frequency band pass wave generator 5.15.
is a mixer, 6 is a modulator, and 7 is a low-frequency wave transducer.

8 (J level converter, 9 is a scrambler, 10 is an encoder, 11.21 is an audio frequency band amplifier, 12 (.L-
q microphone, 14 is a high frequency amplifier, 16 is an intermediate frequency bandpass transducer, and 17 is an intermediate frequency amplifier.

24.26.24', 26' is a switch 25.33 is a memory, 27, 30.31 is an address circuit, 28.32
is binary coded decimal l1lBcD to binary coded hexadecimal BC)I
29 is an exclusive OR circuit.

In FIG. 1, the sound from the microphone 12 is amplified by the audio frequency band amplifier 1, encoded by the encoder 10, then scrambled by the scrambler 9, and then subjected to the level converter 8. The level is converted by the low-frequency wave transducer 7, unnecessary waves are removed by the low frequency transducer 7, modulated by the modulator 6, and converted into a high frequency signal by the mixer 5.High frequency band pass P wave device 4 Power amplifier 3 A/tenor switching switch 2, it becomes a radio wave and is emitted from antenna 1. The radio waves received by the antenna 1 pass through a high-frequency band-pass transducer 13 and a high-frequency amplifier 14, and become an intermediate frequency at a migina 15. Sound is emitted from the subwoofer 22 that passes through the subwoofer 21. Next, channel designation and scrambled butter 7 selection designation will be explained using FIG.
When the signal converted to C2 evolved lO base number B (lJiD) is output and inputted to the address circuit 27, the address circuit 2
In 7.

A data signal is sent which makes the frequency of the Sebuiser 23 stored in the memory 25 correspond to the second channel and becomes the local frequency of the second channel.

When specifying the scramble simple back//, use the switch 26' to select the 100th scramble pattern of the 160rm risk/bull pattern of 256 bits. The signal converted to C2 evolved hexadecimal BCI (D) is input to the address circuit 31, and the address circuit 31 selects an address for specifying the 100th scramble pattern among the 160 scramble patterns stored in the memory 33. Sends out a signal.This causes the address circuit 3
0 through the exclusive OR circuit 29.
The signals are scrambled into the 100th scramble pattern from the equal memory 33 every time slot and output to the level converter 8.

For example, if you set the channel number of a radio to 12 types, this channel number is assigned to each region where the radio is used, and the scrambling pattern is set to 160.
When set to seed, these are pre-assigned for each channel number on a daily or weekly basis, so if you forget the number of scrambled butter 7 that corresponds to the channel number. Conventional digital mobile radios have these drawbacks.

(C) Object of the Invention In view of the above-mentioned drawbacks, the object of the present invention is to provide a digital mobile radio device that can automatically select a scrambled background corresponding to each channel number by specifying a channel number using a channel number changeover switch. be.

(dl) Structure of the Invention In order to achieve the above object, the present invention includes a second memory storing all predetermined scramble pattern numbers corresponding to each channel number of a channel/channel number changeover switch, and a scramble butter/scramble pattern. When the changeover switch is switched to the automatic changeover mode number, a detection circuit detects the number and outputs a signal, and the signal is transmitted from the signal sending side of the number of the channel number changeover switch to the number readout side of the scramble pattern of the second memory. A switch is provided to set the scramble butter 7 changeover switch to an automatic changeover mode number, and when the channel number is specified with the changeover/layer number changeover switch, the scramble pattern corresponding to the changeover/layer number is automatically selected. It is characterized by making it possible.

(e) Embodiment of the Invention An embodiment of the invention will be described below with reference to the drawings. Third
The figure is a block diagram of a digital mobile radio device according to an embodiment of the present invention, and FIG. 4 is a block diagram illustrating channel and scrambling pattern switching in FIG. 3.

In the figures, parts with the same functions as those in Figures 1, 2, and 2 are indicated by the same symbols.

25' is a memory, 26'', 26''', 34 is a switch,
35 indicates a detector.

The difference between FIGS. 3 and 4 from FIGS. 1 and 2 is the following points. In FIG. 4, an automatic switching mode number, for example 160, is set in the switch 26'', and the memory 25' is set with an automatic switching mode number, for example, 160.
When a channel/channel number is specified in the Sweet Tree 24', an address signal sent via the conversion circuit 28 and address circuit 27 is used to specify a predetermined scrambling pattern number corresponding to this channel/channel number. When the switch 26'' is set to automatic switching mode number 160, the conversion circuit 32 sends out a signal converted from binary hexadecimal number BCHD, and the detector 35 detects this signal. The switch 34 is switched from the number signal sending side via the conversion circuit 32 to the scramble pattern number reading side stored in the memory 25' by the switch 26', and the switch 24' corresponds to the channel number specified by C. The point is that scrambled butter can be automatically selected.

This eliminates the need to remember the scramble pattern number corresponding to the channel number.

(f) Effects of the Invention As explained in detail above, according to the present invention, when a channel number is specified, the scrambled butter 7 corresponding to this channel number is automatically selected, so that the scrambled butter 7 corresponding to each stage number is automatically selected. It is effective to remember the pattern number and avoid pinching.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional digital mobile radio device, and FIG. 2 shows switches 24, 26, . 3 is a block diagram of a digital mobile radio device according to an embodiment of the present invention, and FIG. 4 is a block diagram illustrating switching of the Nayan channel and scramble pattern in FIG. 3. In the figure, 1 is an antenna, 2 is an antenna changeover switch 3, a power increaser, 4.13 is a high frequency bandpass p-wave device, 5.15 is a mixer, 6 is a modulator, and 7 is a low frequency wave generator. 8 is a level converter, 9 is a scrambler, 10 is an encoder, 11.12 is an audio frequency band amplifier, 12 is a microbond, 14 is a high frequency amplifier, 16 is an intermediate frequency band pass transducer, 17 is an intermediate frequency amplifier, 18 is a demodulator, 19 is a test scrambler, 220 is a demodulator, 22 is a speaker, 2
3 is a synthesizer, 24°26.24', 26', 26
", 26"', 34 is switch 25.25", , 43
is memory, 27, 30.31 is address circuit, 28.3
2 is a conversion circuit, 29 is an exclusive OR circuit, and 35 is a detector.

Claims (1)

[Claims] Among the N types of scramble patterns 7 stored in the first memory, the number of the first changeover switch is changed to M, a signal with the number λM is sent out, and the M number scramble pattern is selected. In a digital mobile radio device that switches the channel number of a changeover switch to P, sends out a signal with the number P, changes the local frequency, and switches the channel, a predetermined scramble signal C corresponding to each channel number of the second changeover switch is used. a second memory that stores the pattern number; a detection circuit that detects the number and outputs a signal when the first changeover switch is switched to the automatic changeover mode number; and a detection circuit that detects the number and outputs a signal when the first changeover switch is switched to the automatic changeover mode number; A switch is provided to switch from the signal sending side of the second memory to the number reading side of the scramble pattern of the second memory, and when the first changeover switch is set to the automatic changeover mode number and the channel number is specified with the second changeover switch, the corresponding A digital mobile radio device characterized by being able to automatically select a scrambled butter corresponding to a channel number.