JPH1117635A - Mobile radio equipment by time division multiplexing access system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio equipment of the time division multiplexing access TDMA system that discriminates based on a received electric field strength, discriminates burst signals of differing lengths and controls a demodulation section which corresponds to the burst signal. SOLUTION: A reception electric field strength of burst signals with different lengths is detected by an electric field strength level detection section 13. A discrimination section 112 decides the length of the burst signal based on a measured value, the length of the burst signal is reported to a control section 114, and the control signal 114 controls the processing method by a demodulation section 111 based on the length of the burst signal, so that the burst signals of differing lengths are received accurately and demodulated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio apparatus using a time division multiplex access (TDMA).

[0002]

2. Description of the Related Art In a conventional TDMA mobile radio apparatus, a transmission burst signal transmitted from a radio station is configured to be transmitted in one time slot.
As shown in FIG. 1, in a device that receives transmission burst signals having different lengths, it is necessary to accurately receive, demodulate, and demodulate according to the length of the burst signal.

[0003]

However, in the conventional apparatus, in order to accurately distinguish and receive burst signals of different lengths, a plurality of receiving circuits respectively corresponding to the burst signals are required, and the configuration is complicated. Will be.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a TDMA system capable of accurately receiving and demodulating burst signals of different lengths with a single receiving circuit. To provide a mobile wireless device.

[0005]

In order to achieve the above object, a mobile radio apparatus of the TDMA system according to the present invention determines the length of a burst signal based on an electric field signal of a received signal, and determines the length of the burst signal. To the control unit, the control unit controls the processing method of the demodulation unit according to the length of the burst signal.

As a result, according to the present invention, one receiving circuit can accurately receive and demodulate burst signals of different lengths.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The T according to claim 1 of the present invention.
The mobile radio device of the DMA system is a mobile radio device capable of detecting a burst signal of a different length from a transmitter as a reception signal, and a receiving unit that receives the burst signal from the mobile device as a reception signal, A demodulation unit that demodulates the reception signal received by the reception unit, and an electric field intensity level detection unit that detects the electric field intensity of the burst signal received by the reception unit,
The electric field intensity detection value detected by the electric field intensity level detection unit, a determination unit that determines whether the value is equal to or more than a predetermined value within a certain specific time, and determines the length of the burst signal, determined by the determination unit And a control unit for controlling the demodulation unit according to the length of the burst signal.

As a result, the electric field intensity level detector detects the electric field intensity of the received signal based on the received signal received by the receiving unit, and based on the detected electric field intensity detected value, the determining unit determines a predetermined time within a specific time. The length of the burst signal is determined by determining whether the burst signal is equal to or greater than the value. Next, the control unit processes the data generated by the demodulation unit based on the determination result of the length of the burst signal determined by the determination unit.

According to a second aspect of the present invention, there is provided a mobile radio apparatus of the TDMA system capable of detecting a burst signal of a different length from a transmitter as a reception signal. An antenna for receiving, a receiving unit for converting a received signal received by the antenna into an intermediate frequency signal, an electric field intensity level detecting unit for detecting an electric field intensity level of the intermediate frequency signal generated from the receiving unit, A demodulation unit that demodulates a reception signal converted to an intermediate frequency from a reception unit, a counting unit that counts a time from a start point of a reception signal serving as a reference for each reception slot in the reception signal received by the reception unit, Based on the time from the start point of the reception signal for each reception slot counted by the counting unit,
A determination unit that determines whether a field strength detection value detected by the field strength level detection unit within a specific time is equal to or greater than a predetermined value, and determines a length of a burst signal; And a control unit that controls the demodulation unit in accordance with the determined result of the burst signal length and performs processing based on the data generated by the demodulation unit.

As a result, when the reception unit converts the reception signal received by the antenna from the mobile unit into an intermediate frequency signal,
The electric field intensity level detector detects the electric field intensity of the received signal, the counting unit counts the time from the start point of the received signal for each reception slot, and determines the electric field intensity of these received signals and the time from the start point. To communicate. Next, the determination unit determines the length of the burst signal based on whether or not the electric field strength is equal to or more than a predetermined value within a specific time according to the time from the start point of the reception signal transmitted from the counting unit. The control unit processes the data generated by the demodulation unit based on the length determination result.

According to a third aspect of the present invention, there is provided a mobile radio apparatus using a time division multiplex connection (TDMA system) capable of detecting a burst signal having a different length from a transmitter as a reception signal. A plurality of receiving units for receiving the burst signal as a received signal, a plurality of electric field intensity level detecting units for respectively detecting the electric field intensity of the burst signal received by the plurality of receiving units, and the plurality of electric field intensity level detection An electric field intensity synthesizing unit for synthesizing the electric field intensity detected value by the means, and whether the synthesized electric field intensity detected by the electric field intensity level detecting unit and synthesized by the electric field intensity synthesizing unit is equal to or more than a predetermined value within a specific period. Whether to determine whether or not, a determination unit to determine the length of the burst signal, and a control unit to control the demodulation unit according to the length of the burst signal determined by the determination unit Equipped with make up.

As a result, based on the received signals received by the plurality of receiving sections, the plurality of electric field strength level detectors detect the electric field strengths of the received signals, respectively, and the electric field strengths detected by these electric field strength level detectors are used as the electric field strength. The intensity level synthesizing unit synthesizes. Next, the length of the burst signal is determined by determining, based on the combined combined electric field strength, whether the determination unit has a predetermined value or more within a certain time period. Next, the control unit processes the data generated by the demodulation unit based on the determination result of the length of the burst signal determined by the determination unit.

According to a fourth aspect of the present invention, there is provided a mobile radio apparatus using a time division multiplex connection (TDMA system) capable of detecting burst signals of different lengths from a transmitter as a received signal. A plurality of antennas for receiving a reception signal from a mobile device, a plurality of reception units for converting the reception signals received by the respective antennas into signals of an intermediate frequency, and an intermediate signal generated from the reception unit. A plurality of electric field intensity level detectors for detecting electric field intensities of frequency signals, an electric field intensity level synthesizer for synthesizing electric field intensities detected by the plurality of electric field intensity level detectors, and converting the receiving unit to an intermediate frequency A demodulation unit for demodulating the received signal, and a time from a start point of a reception signal serving as a reference for each reception slot in the reception signal received by the reception unit. A counting unit that counts, based on the time from the start point of the reception signal for each reception slot counted by the counting unit, within a specific time, the electric field intensity level detection unit detects and the electric field intensity synthesis unit A determination unit that determines whether or not the combined combined electric field strength is equal to or greater than a predetermined value, and determines a length of the burst signal, and corresponds to a determination result of the length of the burst signal determined by the determination unit. And a control unit that controls the demodulation unit and performs processing based on the data generated by the demodulation unit.

As a result, when the reception signals received by the plurality of antennas from the mobile device are converted by the plurality of receiving units into signals of the intermediate frequency, the plurality of electric field intensity level detectors respectively detect the electric field intensity of the received signal. At the same time, an electric field intensity level synthesizing unit synthesizes the electric field intensity detected by these electric field intensity level detectors. Next, based on the combined electric field strength, the counting section counts the time from the start point of the received signal for each reception slot, and transmits the electric field strength of these received signals and the time from the start point to the determination section. . Next, the determining unit determines the length of the burst signal based on whether or not the combined electric field strength is equal to or greater than a predetermined value within a specific time according to the time from the start point of the received signal transmitted from the counting unit. The control unit processes the data generated by the demodulation unit based on the length determination result.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

(Embodiment 1) FIG. 2 is a block diagram showing the configuration of a TDMA mobile radio apparatus according to Embodiment 1 of the present invention.

In FIG. 2, reference numeral 11 denotes an antenna, 12 denotes a receiver for converting a received signal received from the antenna 11 into an intermediate frequency signal, and 13 detects the electric field strength of the intermediate frequency signal generated from the receiver 12. An electric field intensity level detection unit 111 is a demodulation unit that demodulates a received signal from the reception unit 12, and 112 is whether or not the electric field intensity detected by the electric field intensity level detection unit 13 is equal to or more than a predetermined value within a specific time. The determination unit 113 determines the length of the burst signal. The counting unit 113 counts the time from the start point of the reception signal for each reception slot. , 114 are demodulation units 1
11, a control unit that controls the determination unit 112 and the counting unit 113 using a microcomputer (not shown).

Next, the operation of the above embodiment will be described with reference to FIGS. FIG. 3 shows an operation in which the determination unit 112 determines the length of the burst signal based on the electric field intensity detected by the electric field intensity level detection unit 13 and the time from the start point of the reception signal for each reception slot counted by the counting unit 113. FIG. 4 is a flowchart showing an example of the operation of determining the length of the burst signal.

First, in FIG. 3, the determination unit 112 determines the length of the burst signal based on the electric field intensity detected by the electric field intensity level detection unit 13 and the time from the start point of the reception signal for each reception slot counted by the counting unit 113. The operation for determining the value will be described.

A predetermined value (REF _- LE) of a reference electric field which is used as a reference for determining whether or not the present apparatus is receiving a burst signal.
VEL) is set (step ST1). Next, in step ST2, the electric field intensity level detector 13 that detects the electric field intensity of the intermediate frequency signal generated from the receiver 12 constantly measures the received electric field. Next, at the first position of the uplink reception slot timing on the base station side, the counter value CNT of the counter 113 is reset to 0 (step ST3).

Next, in the determination section 112, the electric field intensity is set between the time when the count value CNT from the number of cases section 113 is 0 and the signal start time T1 of the burst signal 1 shown in FIG. 1 (0 <CNT <T1). It is determined whether or not the received electric field strength level (LEVEL) detected by level detecting section 113 is equal to or greater than predetermined value REF _- LEVEL set in step ST1 (step ST4).

When the received electric field strength exceeds the predetermined value, the type of the burst signal is determined to be burst signal 1, the type of the burst signal is transmitted to the control unit 114, and the control unit 11
4 controls the processing method of the demodulation unit 111, and detects necessary data from the demodulated data generated by the demodulation unit 111 (step ST5).

When the count value CNT is 0 <CNT <T1 and the received electric field is less than the predetermined value, the received electric field is compared continuously. When the count value CNT from the counter 113 is T1 <CNT <T2, the electric field level is detected. It is determined whether the reception electric field strength level (LEVEL) detected by the unit 13 is equal to or more than the predetermined value REF _- LEVEL set in step 1 (step ST6). When the received electric field strength becomes equal to or more than the predetermined value REF _- LEVEL, the type of the burst signal is determined to be the burst signal 2, and the type of the burst signal is transmitted to the control unit 114 (step ST7). Thereafter, the same determination is performed for the number N of burst signal types (step ST8), CNT is completed for one slot, and CNT = 0.
(Step ST9).

Referring to FIG. 4, electric field intensity level detecting section 13
As an example of an operation in which the determination unit 112 determines the length of the burst signal based on the electric field strength detected in step S1 and the time from the start point of the reception signal for each reception slot counted by the counting unit 113, the burst signal 2 shown in FIG. Will be described.

First, the first position of the reception slot (CNT)
= 0), the control unit 114 controls the demodulation unit 111 to process the burst signal 1.

When the count value CNT is 0 <CNT <T1, the reception electric field level (LEVEL) becomes a predetermined value REF.
_- from less than LEVEL, the determination unit 112 determines that it has not received the burst signal 1, the control unit 114 controls to process the burst signal 2 with respect to demodulator 111. Subsequently, the reception electric field is compared, and the counting unit 11
When the count value CNT from 3 is T1 <CNT <T2, the received electric field intensity level (LEVEL) detected by the electric field intensity level detection unit 13 is equal to or more than the predetermined value REF _- LEVEL set in step 1 and is determined. Part 11
2 determines the type of the burst signal as the burst signal 2 and transmits the type of the burst signal to the control unit 114;
4 controls the demodulation unit 111 to continue processing the burst signal 2.

With this configuration, the control unit 114 knows the type of the burst signal, so that the control unit 114 controls the processing method of the demodulation unit 111 according to the length of the burst signal, And more accurate data detection from the burst signal.

The predetermined value of the reference electric field, which is used as a reference for determining whether or not the signal is being received, may be set by a hardware in the case of a fixed value, in the case of setting using a variable resistor, or in the control unit. A memory may be provided and set, or an average value of the received electric field intensity level detected by the electric field intensity level detection unit 13 within a certain period of time may be used.

(Embodiment 2) FIG. 5 is a block diagram showing the configuration of Embodiment 2 of the present invention. Reference numerals 11 and 21 denote antennas, and reference numeral 12 denotes a converter for converting a received signal received from the antenna 11 into an intermediate frequency signal. A receiving unit, 13 is an electric field intensity level detecting unit for detecting the electric field intensity of the intermediate frequency signal generated from the receiving unit 12, and 23 is an electric field intensity for detecting the electric field intensity of the intermediate frequency signal generated from the receiving unit 22 A level detecting unit 14 is a field intensity level synthesizing unit that synthesizes a plurality of electric field intensities of the electric field intensity level detecting units 13 and 23.
Reference numeral 12 denotes a determination unit for determining the length of a burst signal based on whether or not the electric field intensity synthesized by the electric field intensity level synthesizing unit 14 is equal to or more than a predetermined value within a specific time. 0, the end of the receiving slot is a counter value 279, a counting unit for counting the time from the start point of the received signal for each receiving slot, 114 is a demodulating unit 111, a judging unit 112 and a counting unit 113 It is a control unit that controls using.

Next, the operation of the second embodiment will be described. In the second embodiment, the operation is performed when the received electric field intensity detected by the electric field intensity level detection unit 12 in FIG.

That is, the electric field intensity level synthesizing unit 1 shown in FIG.
The operation in which the determination unit 112 determines the length of the burst signal based on the electric field strength detected in Step 4 and the time from the start point of the reception signal for each reception slot counted by the counting unit 113 will be described.

Therefore, first, in FIG. 6, a predetermined value (REF _- LEVEL) of a reference electric field, which is a reference for determining whether or not the present apparatus is receiving a berth signal, is set (step ST1). Next, in step ST2, the receiving unit 1
The electric field intensity level detectors 13 and 23 for detecting the electric field intensity of the intermediate frequency signals generated from the signals 2 and 22 constantly measure the received electric field. Electric field intensity level detector 1
The received electric field measured in 3 and 23 is always obtained by the electric field intensity level synthesizing unit 14 as an average value of a plurality of receiving systems as a synthesized received electric field.

Next, at the first position of the uplink reception slot timing on the base station side, the counter value CNT of the counter 113 is counted.
= 0 (step ST3).

Next, the determination unit 112 determines the electric field intensity between the time when the count value CNT from the number of cases unit 113 is 0 and the signal start time T1 of the burst signal 1 shown in FIG. 1 (0 <CNT <T1). It is determined whether or not the received electric field strength level (LEVEL) detected by the level synthesizing unit 14 is equal to or larger than the predetermined value REF _- LEVEL set in step ST1 (step ST4).

When the combined reception electric field strength is equal to or more than the predetermined value, the type of the burst signal is determined to be the burst signal 1, the type of the burst signal is transmitted to the control unit 114, and the control unit 114 The method is controlled and the demodulation unit 1
Necessary data is detected from the demodulated data generated in step 11 (step ST5).

When the count value CNT is 0 <CNT <T1 and the received electric field is smaller than the predetermined value, the received electric field is compared, and when the count value CNT from the counter 113 is T1 <CNT <T2, the electric field level is detected. It is determined whether the reception electric field strength level (LEVEL) detected by the unit 13 is equal to or more than the predetermined value REF _- LEVEL set in step 1 (step ST6). When the combined reception electric field strength becomes equal to or more than the predetermined value REF _- LEVEL, the type of the burst signal is determined to be the burst signal 2, and the type of the burst signal is transmitted to the control unit 114 (step ST7). Thereafter, the same determination is performed for the number N of the types of the burst signal (step ST8), CNT ends one slot, and CN
The process is performed until T = 0 is reset (step ST9).

FIG. 1 shows an example of an operation in which the determination section 112 determines the length of the burst signal based on the electric field strength shown in FIG. 6 and the time from the start point of the reception signal for each reception slot counted by the counting section 113. The case where the burst signal 2 shown is received will be described.

First, the first position of the reception slot (CNT)
= 0), the control unit 114 controls the demodulation unit 111 to process the burst signal 1.

When the count value CNT is 0 <CNT <T1, the reception electric field level (LEVEL) becomes a predetermined value REF.
_- from less than LEVEL, the determination unit 112 determines that it has not received the burst signal 1, the control unit 114 controls to process the burst signal 2 with respect to demodulator 111. Subsequently, the reception electric field is compared, and the counting unit 11
When the count value CNT from 3 is T1 <CNT <T2, the received electric field intensity level (LEVEL) detected by the electric field intensity level detection unit 13 is equal to or more than the predetermined value REF _- LEVEL set in step 1, and thus the determination is made. Part 11
2 determines the type of the burst signal as the burst signal 2 and transmits the type of the burst signal to the control unit 114;
4 controls the demodulation unit 111 to continue processing the burst signal 2.

With this configuration, the control unit 114 knows the type of the burst signal, and the control unit 114 controls the processing method of the demodulation unit 111 according to the length of the burst signal. And more accurate data detection from the burst signal.

Further, by using a plurality of receiving systems, fluctuations in the electric field strength due to fading or the like can be eliminated, and a more reliable burst signal can be determined.

The electric field intensity level detectors 13 and 23 calculate the reception electric field which is always measured.
Although the average value of the plurality of reception systems at each time point is obtained, the accuracy of the combined reception electric field strength can be further improved by shortening the sampling interval and obtaining the average in time. Further, in the second embodiment, the case where the number of the receiving systems is two is shown, but the number of the receiving systems may be plural.

[0043]

The TD of the present invention configured as described above
In a mobile radio device of the MA system, the electric field intensity of a received signal is detected, the electric field intensity of the received signal is detected, and a burst signal is detected based on whether or not the electric field intensity detected value is equal to or more than a predetermined value within a specific time. By determining the length of the data, more accurate data detection and control can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing transmission burst signals having different lengths.

FIG. 2 is a block diagram illustrating a configuration of a TDMA mobile radio apparatus according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of determining the length of a burst signal in FIG. 2;

FIG. 4 is a diagram showing an example of an operation for determining the length of a burst signal in FIG. 2;

FIG. 5 is a block diagram illustrating a configuration of a TDMA mobile radio apparatus according to a second embodiment of the present invention;

FIG. 6 is a flowchart showing an operation of determining the length of a burst signal in FIG. 5;

FIG. 7 is a diagram showing an example of an operation for determining the length of a burst signal in FIG. 5;

[Explanation of symbols]

 11, 21 Antenna 12, 22 Receiving unit 13, 23 Electric field intensity level detecting unit 14 Electric field intensity level synthesizing unit 111 Demodulating unit 112 Judgment unit 113 Counting unit 114 Control unit

Claims (4)

[Claims] 1. A time division multiplexing connection system (T) capable of detecting burst signals of different lengths from a transmitter as a received signal.
A receiving unit that receives the burst signal from a mobile device as a reception signal, a demodulation unit that demodulates the reception signal received by the reception unit, and a burst signal that is received by the reception unit. An electric field intensity level detecting unit for detecting the electric field intensity of the burst signal, and determining whether or not the electric field intensity detected value detected by the electric field intensity level detecting unit is equal to or greater than a predetermined value within a specific time. And a control unit that controls the demodulation unit according to the length of the burst signal determined by the determination unit. Mobile radio device. 2. A time division multiplexing connection system (T) capable of detecting burst signals of different lengths from a transmitter as received signals.
An antenna for receiving a received signal from a mobile station, a receiving unit for converting a received signal received by the antenna into an intermediate frequency signal, and an intermediate frequency signal generated from the receiving unit. An electric field intensity level detection unit for detecting an electric field intensity of a signal; a demodulation unit for demodulating a reception signal converted from the reception unit into an intermediate frequency; and a reception serving as a reference for each reception slot in the reception signal received by the reception unit. A counting unit that counts the time from the start point of the signal, based on the time from the start point of the received signal for each reception slot counted by the counting unit, detected by the electric field intensity level detection unit within a specific time. A determination unit that determines whether the detected electric field strength value is equal to or greater than a predetermined value, and determines a length of the burst signal; and a determination result of the length of the burst signal determined by the determination unit. And a control unit that controls the demodulation unit in response to the data and performs processing based on the data generated by the demodulation unit. 3. A time division multiplexing connection system (T) capable of detecting burst signals of different lengths from a transmitter as a received signal.
A plurality of receiving units that receive the burst signal as a received signal; a plurality of electric field strength level detecting units that respectively detect electric field strengths of the burst signals received by the plurality of receiving units; An electric field intensity synthesizing unit for synthesizing electric field intensity detection values by the plurality of electric field intensity level detecting units; and a synthetic electric field intensity detected by the electric field intensity level detecting unit and synthesized by the electric field intensity synthesizing unit within a specific period. A determination unit that determines whether or not a predetermined value or more, a determination unit that determines the length of the burst signal, and a control unit that controls the demodulation unit according to the length of the burst signal determined by the determination unit, A mobile radio apparatus based on a time-division multiplexing connection system, comprising: 4. A time division multiplexing connection system (T) capable of detecting burst signals of different lengths from a transmitter as a received signal.
A plurality of antennas for receiving a reception signal from a mobile device; a plurality of reception units for converting the reception signals received by the respective antennas into signals of an intermediate frequency; and the reception unit. A plurality of electric field intensity level detecting units each detecting an electric field intensity of an intermediate frequency signal generated from the plurality of electric field intensity detecting units; an electric field intensity level synthesizing unit synthesizing the electric field intensity detected by the plurality of electric field intensity level detecting units; A demodulation unit that demodulates a received signal converted to an intermediate frequency, a counting unit that counts a time from a start point of a reception signal serving as a reference for each reception slot in the reception signal received by the reception unit, and the counting unit. The electric field intensity level detection unit detects the electric field intensity within a specific time based on the time from the start point of the reception signal for each reception slot counted by A determining unit that determines whether the combined electric field strength combined by the combining unit is equal to or greater than a predetermined value, and determines a length of the burst signal; and a determination result of the length of the burst signal determined by the determining unit. And a control unit that controls the demodulation unit in response to the data and performs processing based on the data generated by the demodulation unit.