JP2000023263A - Tdma system digital mobile object communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to receive only a burst of high reception electric field level even when the burst of low reception electric field level is laid over the burst of high reception electric field level by making a UW detection window for a UW detection circuit open only when the reception electric field level is higher than a threshold. SOLUTION: A control part 8 sets a threshold in a reception electric field level comparison control means 10 in advance before starting level boarding operation. The reception electric field level comparison control means 10 compares an A/D conversion value (a reception electric field level) obtained from an A/D conversion means 9 during the level boarding operation with the threshold set by the control part 8 and, only when the reception electric field level is higher than the threshold, it is control so that a UW detection window of a UW detection part 5 is made to open. When the reception electric field level is lower than the threshold, it is control so that the UW detection window of the UW detection part 5 is made to close.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bit synchronization operation control, a frame synchronization operation control, and a power supply control of a radio unit in a receiving system of a TDMA digital mobile communication device.

[0002]

2. Description of the Related Art Conventionally, as a receiving system of this kind of TDMA type digital radio communication apparatus, there is one as shown in FIG. FIG. 2 is a block diagram showing a configuration of a receiving system of a conventional TDMA digital mobile communication device. In FIG. 2, 1 is a receiving system of a TDMA digital mobile communication device, 2 is an antenna, 3 is a radio unit, 4 is a demodulation unit, 5 is a unique word (hereinafter referred to as UW) detection unit, and 6 is data processing. , 7 is a reception data buffer, 8 is a control unit, and 9 is A / D conversion means.

[0003] Next, the configuration of a receiving system of a conventional TDMA digital mobile communication device (hereinafter, also referred to as a mobile station) will be described in detail with reference to FIG. The antenna 2 transmits and receives radio waves in a specific frequency band. The radio unit 3 receives and amplifies radio waves of a specific frequency, down-converts to an intermediate frequency, and outputs it. The demodulation unit 4 decodes the received data into a digital signal, and also operates as a bit synchronization that extracts a clock component of the received data and synchronizes a clock phase used in the TDMA processing unit with the base station. The enable / disable control of the bit synchronization operation is performed by the control unit 7 described later.

[0004] The unique word detector 5 detects a UW bit pattern for establishing frame synchronization from the data string of the received data. The UW detection permission section in which the UW detection is permitted is controlled by the control unit 7 described later.
UW detection permission section (UW detection window open section)
Only when a UW bit pattern is detected within the above, it is regarded as UW detection. Also, according to the UW detection timing, T
A counter for controlling the operation timing of the entire DMA processing unit (hereinafter referred to as a synchronization counter) is reset and initialized, and the entire TDMA processing unit is synchronized with the partner station and operated at the timing.

The data processing unit 6 performs descrambling processing, data error detection / error correction, and confidential processing on received data. The data processing unit 6 also determines whether the received data is normal data or abnormal data by performing a data check such as a CRC check, and outputs the determination result to the control unit 8 described later. The reception data buffer 7 is storage means for storing reception data that has been subjected to data processing after decoding. The control section 8 controls each section of the receiving system. A / D conversion means 9
The wireless unit 3 converts the strength of the electric field strength of the received data received by the wireless unit 3 into a voltage value in the wireless unit 3, receives the voltage value, and performs A / D conversion.

[0006] Next, referring to FIG.
The operation of the receiving system of the A-type digital mobile communication device will be described. The receiving state of the TDMA digital mobile communication device can be divided into three states as described below.
The first state is a state in which frame synchronization has not been established with respect to the base station, such as when the power is turned on and when the mobile station moves out of the range of the base station with which the mobile station has been registered. The mobile station performs an operation of searching for a base station having the best reception state (highest reception level) at that point (this operation is hereinafter referred to as “level boarding”). As a reception state of the mobile station at this time, continuous reception is performed in a period in which all transmission data of all base stations can be received one by one.
In this case, since the frame synchronization and the bit synchronization with respect to the base station are not established at all, the control unit 8 controls the demodulation unit 4
Of the UW detection unit 5
Of the UW detection window is opened (UW detectable state).

When UW is detected in this state, the synchronization counter is reset at the UW detection timing, and the data processing unit 6 operates in synchronization with the synchronization counter, and the data that has been subjected to data processing is buffered in the reception buffer 7. Ring. The UW detection window is automatically closed from the UW detection timing to the rear end timing of the reception burst determined by the synchronization counter, thereby preventing erroneous detection of UW in the reception burst section. After the burst, the UW detection window opens again. The bit synchronization operation of the demodulation unit 4 is always enabled during the level boarding.

[0008] As a result of a data check such as a CRC error check in the data processing unit 6, if the received data is determined to be normal data, the CPU
The identification code of the detected base station is obtained from the reception buffer 7 according to the software control by
And the reception electric field level value of the reception burst obtained from is stored as a set. By performing this operation in a period during which all the transmission data of all the base stations described above can be received, the mobile station can search for a base station with the best reception state (highest reception level) at that point. .

The second state is a state after a specific base station is selected by level boarding (hereinafter, this base station is referred to as a desired base station). In this manner, the specific base station is selected. Thereafter, the base station receives a burst transmitted at a specific fixed time interval (TDMA frame length × integer multiple: hereinafter, this interval is referred to as “broadcast information period”) (this operation is hereinafter referred to as “designated base station reception”). ). The mobile station can obtain incoming information from the base station by receiving from the designated base station, and can obtain transmission timing of a transmission request signal and the like when transmitting from the mobile station.

In this case, since the “broadcast information cycle” is a relatively long cycle with respect to the TDMA frame, the mobile station generally controls the timing with a low-speed clock to reduce power. This low-speed clock has a larger deviation (timing error) than the high-speed clock.
In this case, it is necessary to start continuous reception at a timing that allows for the deviation of the low-speed clock. At this time, the control unit 8 enables the bit synchronization control of the demodulation unit 4 and
The UW detection window of the detection unit 5 is opened.

When UW is detected in this state, the synchronization counter is reset at the UW detection timing, the data processing unit 6 operates in synchronization with the synchronization counter, and the data processed is buffered in the reception buffer 7. Ring. The UW detection window is automatically closed from the UW detection timing to the rear end timing of the reception burst determined by the synchronization counter, thereby preventing erroneous detection of UW in the reception burst section. Thereafter, the UW detection window is opened again. During this time, the bit synchronization operation of the demodulation unit 4 remains enabled.

After the reception is completed up to the end timing of the reception burst, a data check such as a CRC error check is performed in the data processing unit 6, and as a result, if it is determined that the received data is normal data, the control unit 8 CPU
, The identification code of the received base station is obtained from the reception buffer 7 and it is determined whether the received data is from the desired base station. At this time, if it is not the identification code of the desired base station, the control unit 8 continues the receiving operation without doing anything. If the identification code is a desired base station, no further receiving operation is necessary.
Disable the bit synchronization operation of
The UW detection window of the W detection unit 5 is closed, and the wireless unit 3 is further controlled to stop the reception operation of the wireless unit.

Further, as another third reception operation state, there is reception in a TDMA frame period (hereinafter referred to as "burst reception"). In the present invention, since there is no invention item for the burst reception operation, the description of the burst reception operation is omitted.

[0014]

In the receiving system of the above-mentioned conventional TDMA digital mobile communication device, the following four systems are required.
There were two issues. First, in the receiving system of the above-described conventional TDMA digital mobile communication device, at the time of level boarding, a burst having a low reception electric field level is transmitted in front of a burst having a high reception electric field level. The burst of the received electric field level
After detecting W, the UW detection window is closed to the end of the burst, so that the UW of the burst having a high received electric field level received during the close period cannot be detected. In this state, there is a problem that a burst having a high electric field level cannot be detected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problem. A / D conversion of the electric field level of a reception burst is performed periodically during level boarding, and the result is set in advance by a user. A / D
UW only when the conversion value is higher than the set threshold
By opening the detection window to detect the UW of the received burst, and when the A / D conversion value is equal to or less than the threshold value, the UW of the received burst is not detected without opening the UW detection window, thereby enabling the reception of the burst. It is an object of the present invention to provide a TDMA digital mobile communication device capable of receiving only a burst having a high reception electric field level even when a burst having a low reception electric field level overlaps with a burst having a high electric field level. I do.

Second, in the receiving system of the conventional TDMA digital mobile communication device, upon receiving a designated base station, after receiving a burst of a desired base station, the receiving unit is controlled by software in a CPU of a control unit. The identification code of the base station is obtained from the buffer, and it is determined whether the received data is from the desired base station. If the received data is the identification code of the desired base station, the bit synchronization operation of the demodulation unit is disabled. At the same time, the UW detection window of the UW detection unit is set to close, and the reception operation of the wireless unit is stopped by the control of the wireless unit.

After the reception of the burst from the desired base station is completed (the UW detection window is opened again at this timing), the CPU confirms the identification code of the base station and then closes the UW detection window. Since software processing time is required until setting and disabling bit synchronization operation, if a burst from another base station is received during this time, bit synchronization operation is performed on that burst. As a result, a phase shift occurs between the bit synchronization performed on the desired base station and the clock,
When it is necessary to transmit to the base station immediately after that or when shifting to burst reception operation, it is possible to perform a transmission burst at the timing of phase shift or to receive a burst at the timing of phase shift. There was a problem that there is.

Similarly, after the reception of a burst from a desired base station is completed, a burst of another base station exists between the time when the UW detection window is opened again and the time when it is set to close by the CPU. Then, there is a problem that the UW bit string in the burst is detected and frame synchronization with a desired base station is shifted.
Also at this time, when it is necessary to transmit to the base station immediately or when shifting to the burst reception operation, the transmission burst may be performed at the timing of the frame synchronization shift,
Another problem is that burst reception is performed at the timing of a frame synchronization shift.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. When a designated base station is received, a preset base station identification code and a base station identification code included in actually received data are used. The codes are compared in real time, and if the base station identification codes match, immediately after the end of the reception of the burst, the bit synchronization operation is automatically disabled by hardware control with a short operation time instead of software control with a short operation time. By disabling and closing the UW detection window, an object is to suppress occurrence of clock phase shift and frame synchronization shift.

Third, in the receiving system of the above-mentioned conventional TDMA digital mobile communication device, when a designated base station is received,
When the burst of another base station is overlapping the burst of the desired base station in front of it, the UW window is closed until the reception of the burst from the another base station ahead to the end of the burst is completed. Therefore, there is a problem that UW of a burst from a desired base station cannot be detected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. When a designated base station is received, a preset base station identification code and a base station identification code included in actually received data are used. The codes are compared in real time. If the base station identification code in the received data does not match the preset base station identification code, the UW detection window is opened immediately upon detection of the mismatch. Thus, even when an interference wave is received in the forward direction when receiving a designated base station, a TDMA digital mobile communication device having improved reception characteristics of a desired base station can be obtained. The purpose is to provide.

Fourth, in the receiving system of the above-mentioned conventional TDMA digital mobile communication device, when a designated base station is received,
Since the CPU needs to check the identification code of the base station, control the wireless unit, and perform a wireless process until the wireless unit is stopped, there is a problem that the wireless unit is powered on in a meaningless manner during that time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. When a designated base station is received, a preset base station identification code and a base station identification code included in actually received data are used. The code is compared with the code in real time, and if the base station identification code matches, the radio unit is automatically turned off by hardware instead of software control after the end of receiving the burst and the radio unit is stopped. Accordingly, it is an object of the present invention to provide a TDMA digital mobile communication device capable of reducing power consumption and preventing a clock phase shift and a frame synchronization shift due to unnecessary data reception.

[0024]

In order to achieve the first object, the present invention provides a radio unit for converting the intensity of the electric field strength of received data received from a base station at the time of level boarding into a voltage value; A / D conversion means for converting a received electric field strength converted into a value into an A / D converted value at regular time intervals, a UW detection unit for detecting UW from received data, and an A / D converted value of the received electric field strength And a received electric field level comparison control means for controlling the operation of the UW detection window of the UW detection section based on the comparison result by comparing the received electric field intensity with the predetermined threshold value. The UW detection window of the UW detection section is opened only when the conversion value is higher than the threshold value.

According to the present invention, the UW detection window of the UW detection circuit is opened only when the reception electric field level is higher than the threshold value. Even when bursts of a low electric field level are received so as to overlap in front, a TDMA digital mobile communication device capable of receiving a burst of a high received electric field level can be obtained.

According to the present invention, in order to achieve a second object, a demodulation unit for controlling enable / disable of a bit synchronization operation, a UW detection unit for detecting UW from received data,
Identification code coincidence detecting means for comparing the identification code of the base station in the received data with the identification code of a preset desired base station; and the UW of the UW detection section automatically detects the detection result of the identification code coincidence detection means. A synchronization control unit for controlling a bit synchronization operation of the detection window and the demodulation unit, and the result of comparison of the identification code in the identification code match detection means, when the identification code of the received data and the preset identification code match, Under the control of the synchronization control means, the bit synchronization operation of the demodulation section is automatically disabled immediately after the end of the reception to the end of the burst, and the UW detection window of the UW detection section is automatically closed.

According to the present invention, when receiving a designated base station, if it is determined that the received burst is a burst from a desired base station due to coincidence with the identification code, reception is completed to the rear end of the burst by the control of the synchronization control means. By automatically disabling the bit synchronization operation immediately afterward and closing the UW detection window, even if another burst exists after a burst from the desired base station, the desired base station can be used. TDMA digital mobile communication device capable of protecting the clock phase and frame synchronization with respect to.

According to the present invention, in order to achieve a third object, a UW detecting unit for detecting UW from received data, an identification code of a base station in the received data and a predetermined identification code of a desired base station are provided. And a synchronization control means for automatically controlling the UW detection window of the UW detection unit based on the detection result of the identification code match detection means, and comparing the identification codes in the identification code match detection means. As a result, when the identification code of the received data does not match the preset identification code, the UW detection window of the UW detection unit is automatically opened immediately.

According to the present invention, when it is determined that a received burst is not a burst from a desired base station at the time of reception of a designated base station, the UW detection window is opened immediately after the determination, whereby the desired base station is opened. Even when a burst of another base station overlaps a burst of a station, a TDMA digital mobile communication apparatus capable of detecting the burst of a desired base station by UW and improving reception characteristics is obtained. Can be

In order to achieve the fourth object, the present invention provides a radio unit for receiving and amplifying radio waves of a specific frequency, a base station identification code in the received data and a preset desired base station. An identification code matching detection unit for comparing the identification code with the identification code; and a wireless unit control unit for controlling the power supply of the wireless unit based on the comparison result of the identification code match detection unit. As a result, when the identification code of the received data matches the preset identification code,
The radio unit control means automatically turns off the power of the radio unit immediately after the reception to the end of the burst is completed.

According to the present invention, when it is determined that a received burst is a burst from a desired base station at the time of reception of a designated base station, the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst. With the setting, it is possible to obtain a TDMA digital mobile communication device capable of preventing clock phase shift by preventing unnecessary reception operation, protecting frame synchronization, and reducing power consumption.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A TDMA digital mobile communication apparatus according to the first aspect of the present invention includes a radio unit for converting the strength of the electric field of received data received from a base station into a voltage value; A / D conversion means for converting the received electric field strength converted into the voltage value into an A / D converted value at regular time intervals, a UW detection unit for detecting a unique word (UW) from received data, Receiving electric field level comparison control means for comparing the A / D conversion value of the above with a preset threshold value and controlling the operation of the UW detection window of the UW detection section based on the comparison result. The UW detection window of the UW detection unit is opened only when the A / D conversion value of the electric field strength is higher than the threshold value, and only when the reception electric field level is higher than the threshold value. By setting the UW detection window of the UW detection circuit to be open, there is a case where, during level boarding, a burst of a low electric field level is received so as to overlap a burst of a high received electric field level. However, there is an effect that a burst having a high reception electric field level can be received.

According to the second aspect of the present invention, T
The DMA type digital mobile communication device includes a demodulation unit for controlling enable / disable of a bit synchronization operation, a UW detection unit for detecting UW from received data, and an identification code of a base station included in the received data. Identification code coincidence detecting means for comparing with an identification code of a desired base station; and synchronous control for automatically controlling a UW detection window of a UW detection section and a bit synchronization operation of a demodulation section based on a detection result of the identification code coincidence detection means. Means for determining whether or not the identification code of the received data matches a preset identification code as a result of the comparison of the identification codes by the identification code coincidence detecting means. Immediately thereafter, the bit synchronization operation of the demodulation unit is automatically disabled, and the UW detection window of the UW detection unit is automatically closed. If it is determined at the time of reception at the designated base station that the received burst with the matching identification code is a burst from the desired base station, the synchronization control means controls immediately after the end of the reception to the end of the burst. By automatically disabling the bit synchronization operation and closing the UW detection window, even if another burst is present immediately after a burst from the desired base station, This has the effect that the phase of the clock and the frame synchronization can be protected.

According to the third aspect of the present invention, T
The DMA digital mobile communication device includes a UW detection unit for detecting UW from received data, and an identification code match detection for comparing an identification code of a base station in the received data with an identification code of a preset desired base station. Means for automatically controlling the UW detection window of the UW detection unit based on the detection result of the identification code coincidence detection means. When the identification code and the preset identification code do not match, the UW detection window of the UW detection unit is automatically opened immediately. If it is determined that the burst is not a burst from the base station, the UW detection window is opened immediately after the determination, so that the desired base station Even if it has overlapping bursts of another base station in front of the paste, an effect that it is possible to improve reception characteristics by enabling UW detection of a burst of the desired base station.

In the invention according to claim 4 of the present invention, T
The DMA digital mobile communication device includes a radio unit that receives and amplifies radio waves of a specific frequency, and an identification unit that compares an identification code of a base station in received data with an identification code of a preset desired base station. A code matching detection unit; and a radio unit control unit that controls the power of the radio unit based on the comparison result of the identification code match detection unit. And when the preset identification code matches, the radio unit control means automatically turns off the power of the radio unit immediately after the end of the reception to the end of the burst. Sometimes, when it is determined that the received burst is a burst from a desired base station, the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst. An effect that it is possible to protect the preventing and frame synchronization the phase shift of the clock by not extra reception operation, to reduce power consumption.

According to the fifth aspect of the present invention, T
The DMA type digital mobile communication device comprises: a radio unit for converting the strength of the electric field of received data received from a base station into a voltage value; a demodulation unit for controlling enable / disable of a bit synchronization operation; A / D conversion means for converting the received electric field strength converted into A / D converted values at regular time intervals, a UW detection unit for detecting UW from received data,
Receiving electric field level comparison control means for comparing the A / D converted value of the received electric field strength with a preset threshold value and opening a UW detection window only when the received electric field strength is higher than the threshold value according to the comparison result And identification code matching detection means for comparing the identification code of the base station in the received data with the identification code of the preset desired base station, and when the identification codes match according to the detection result of the identification code match detection means. Automatically disables the bit synchronization operation immediately after the end of the reception to the end of the burst under the control of hardware.
A synchronization control means for automatically closing the W detection window is provided. By combining the first embodiment and the second embodiment, a low electric field level burst is provided in front of a high received electric field level burst. Even when the bursts are received so as to overlap with each other, a burst having a high reception electric field level can be received, and if it is determined that the received burst is a burst from a desired base station, a hardware By automatically controlling the bit synchronization operation immediately after the end of the burst to the end of the burst by the control of the hardware and closing the UW detection window, another burst can be generated immediately after the burst from the desired base station. Even when present, it is possible to protect the clock phase and frame synchronization with respect to a desired base station. It has the effect of say.

According to the sixth aspect of the present invention, T
The DMA type digital mobile communication device includes a radio unit for converting the intensity of the electric field strength of the received data received from the base station into a voltage value, and an A / D converter for converting the received electric field intensity converted into the voltage value at regular time intervals. A / D conversion means for converting to a converted value, a UW detection unit for detecting UW from the received data, and comparing the A / D converted value of the received electric field strength with a preset threshold value and comparing the result with the predetermined threshold value. A received electric field level comparison control means for opening a UW detection window only when the received electric field strength is higher than a threshold value, and comparing an identification code of a base station in received data with an identification code of a preset desired base station. And a synchronous control means for automatically opening the UW detection window of the UW detector immediately when the identification codes do not match according to the detection result of the identification code match detection means. Is obtained by the so provided bets,
By combining the first embodiment and the third embodiment, even when a low electric field level burst is received in front of a high electric field level burst, a high received electric field level burst is received. A burst can be received, and if it is determined that the received burst is not a burst from the desired base station, the UW detection window is opened immediately after the determination, so that a burst ahead of the burst of the desired base station can be obtained. Thus, even when bursts of another base station are overlapping, the UW detection of the burst of the desired base station can be performed, and the reception characteristics can be improved.

In the invention according to claim 7 of the present invention, T
The DMA type digital mobile communication device receives and amplifies a radio wave of a specific frequency, and converts a radio field intensity of the received data into a voltage value, and a reception field intensity converted into the voltage value. A / D conversion means for converting the A / D conversion value into A / D conversion values at regular time intervals, a UW detection unit for detecting UW from the received data, and a predetermined threshold value for the A / D conversion value of the received electric field intensity. The received electric field level comparison control means for opening the UW detection window only when the received electric field strength is higher than the threshold value based on the comparison result, and the identification code of the base station in the received data and the preset desired value When the identification code match detection means compares the identification code of the base station with the identification code of the base station according to the comparison result of the identification code match detection means, the power supply of the radio unit is shut off immediately after the end of the reception to the end of the burst. Unit control means. By combining Embodiment 1 and Embodiment 4, it is possible to receive a signal such that a burst of a low electric field level overlaps a burst of a high electric field level. In this case, a burst having a high reception electric field level can be received, and if it is determined that the received burst is a burst from a desired base station, the burst is automatically made immediately after the end of reception to the end of the burst. By setting the power of the radio unit to off, there is an effect that it is possible to prevent a clock phase shift and protect frame synchronization by not performing unnecessary reception operation, and to reduce power consumption. .

In the invention according to claim 8 of the present invention, T
The DMA type digital mobile communication device includes a demodulation unit for controlling enable / disable of a bit synchronization operation, a UW detection unit for detecting UW from received data, and an identification code of a base station included in the received data. An identification code match detecting means for comparing with an identification code of a desired base station; and when the identification codes match according to the detection result of the identification code match detection means, the bit is set immediately after the end of the reception to the end of the burst by hardware control. A synchronization control means for automatically disabling the synchronization operation, automatically closing the UW detection window, and automatically opening the UW detection window immediately when the identification code does not match. Yes, by combining Embodiment 2 and Embodiment 3, it is determined that the received burst is a burst from a desired base station. In this case, the bit synchronization operation is automatically disabled immediately after the end of the burst until the end of the burst under the control of hardware, and the UW detection window is closed, so that immediately after the burst from the desired base station, Even when another burst exists, the clock phase and frame synchronization with respect to the desired base station can be protected, and if it is determined that the received burst is not a burst from the desired base station, the UW By making the detection window open, even if a burst of another base station overlaps a burst of a desired base station, the burst of the desired base station can be detected by UW detection. It has an effect that characteristics can be improved.

According to the ninth aspect of the present invention, T
The DMA type digital mobile communication device includes a demodulation unit for controlling enable / disable of a bit synchronization operation, a UW detection unit for detecting UW from received data, and an identification code of a base station included in the received data. An identification code match detecting means for comparing with an identification code of a desired base station; and when the identification codes match according to the detection result of the identification code match detection means, the bit is set immediately after the end of the reception to the end of the burst by hardware control. When the identification code matches according to the comparison result of the synchronization control means for automatically disabling the synchronization operation and automatically closing the UW detection window and the identification code match detection means, after the end of reception to the end of the burst, A wireless unit control means for immediately shutting off the power of the wireless unit is provided. And by, when the received burst is determined to be a burst from a desired base station, to disable the automatic bit synchronizing operation immediately after the end of reception to the burst trailing edge under the control of the hardware, and UW
By closing the detection window,
Even in the case where another burst exists immediately after a burst from the desired base station, the clock phase and frame synchronization with respect to the desired base station can be protected, and the reception burst can be a burst from the desired base station. When it is determined that the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst, it is possible to prevent a clock phase shift by preventing unnecessary reception operation and This has the effect of protecting frame synchronization and reducing power consumption.

According to a tenth aspect of the present invention, there is provided a TDMA digital mobile communication apparatus, comprising: a UW detection unit for detecting a UW from received data; a base station identification code in the received data; An identification code match detection unit that compares the identification code of the base station with the identification code of the base station.
If the identification code matches according to the result of comparison between the synchronization control means for automatically opening the UW detection window immediately and the identification code match detection means, the power supply to the radio unit is immediately shut down after the end of reception to the end of the burst. A wireless unit control means. By combining the third and fourth embodiments, when it is determined that the received burst is not a burst from a desired base station, the UW detection window is provided immediately after the determination. Is open, even if a burst of another base station is overlapping a burst of a desired base station, UW detection of a burst of the desired base station is enabled and reception characteristics are improved. If it is determined that the received burst is a burst from a desired base station, the reception is terminated until the end of the burst. By automatically turning off the power of the radio unit later, it is possible to prevent clock phase shift by not performing unnecessary reception operation, protect frame synchronization, and reduce power consumption. It has the action of:

A TDMA digital mobile communication apparatus according to the present invention is a radio communication unit for converting the strength of the electric field of received data received from a base station into a voltage value, and a bit synchronization operation. A demodulation unit for controlling enable / disable; A / D conversion means for converting the received electric field strength converted into the voltage value into an A / D conversion value at regular time intervals; and UW detection for detecting UW from received data Unit, and compares the A / D converted value of the reception electric field strength with a preset threshold value, and determines the UW detection window of the UW detection unit only when the reception electric field strength is higher than the threshold value according to the comparison result. Receiving electric field level comparison control means to be opened; identification code coincidence detecting means for comparing an identification code of a base station in received data with an identification code of a preset desired base station; If the identification code matches with the detection result of the match detecting means, the bit synchronization operation is automatically disabled immediately after the end of the reception until the end of the burst by hardware control, and the UW detection window is automatically closed, A synchronization control means for automatically opening the UW detection window immediately when the identification codes do not match is provided. By combining the first embodiment, the second embodiment, and the third embodiment, Even if a low electric field level burst is received in front of a high received electric field level burst, a high received electric field level burst can be received. If it is determined that the burst is from the base station, the hardware automatically controls the end of the burst immediately after the end of reception. By disabling the clock synchronization operation and closing the UW detection window, even if another burst exists immediately after a burst from the desired base station, the clock for the desired base station can be changed. The phase and frame synchronization can be protected, and when it is determined that the received burst is not a burst from the desired base station, the UW detection window is opened immediately after the determination, whereby the desired base station can be protected. Even if a burst of another base station overlaps with the burst ahead, the UW detection of the burst of the desired base station can be performed and the reception characteristics can be improved.

According to a twelfth aspect of the present invention, the TDMA digital mobile communication apparatus receives and amplifies a radio wave of a specific frequency, and converts the strength of the electric field of the received data received from the base station into a voltage. A radio unit for converting the value into a value, a demodulation unit for controlling enable / disable of the bit synchronization operation, and an A / D converter for converting the received electric field strength converted into the voltage value into an A / D converted value at regular time intervals. Means, a UW detection unit for detecting UW from the received data, and comparing the A / D converted value of the received electric field strength with a preset threshold value, and as a result of the comparison, the received electric field strength is higher than the threshold value Receiving electric field level comparison control means for opening a UW detection window only in a case; identification code coincidence detection for comparing an identification code of a base station in received data with an identification code of a preset desired base station And the UW detection window of the UW detection unit and the bit synchronization operation of the demodulation unit are automatically controlled by the detection result of the identification code match detection means. When the identification codes match, the burst end is controlled by hardware. The bit synchronization operation is automatically disabled immediately after the reception ends, and the synchronization control means for automatically closing the UW detection window automatically matches the identification code according to the comparison result of the identification code match detection means. A wireless unit control means for immediately shutting off the power of the wireless unit immediately after the end of the reception is provided. By combining the first embodiment, the second embodiment, and the fourth embodiment,
Even in the case where a burst of a low electric field level is received so as to overlap a burst of a high received electric field level, a burst of a high received electric field level can be received. When it is determined that the burst is from the base station, the bit synchronization operation is automatically disabled immediately after the end of the reception up to the end of the burst by hardware control, and the UW detection window is closed. Even if another burst exists immediately after the burst from the base station, the clock phase and frame synchronization for the desired base station can be protected, and the reception burst is the burst from the desired base station. If it is determined that there is, the radio unit is automatically turned off immediately after the end of the reception until the end of the burst By was Unishi has the effect of being able to protect the preventing and frame synchronization the phase shift of the clock by not extra reception operation, to reduce power consumption.

The TDMA digital mobile communication device according to the thirteenth aspect of the present invention receives and amplifies a radio wave of a specific frequency and converts the strength of the electric field strength of the received data received from the base station into a voltage. A radio unit for converting the value into a value, and a reception electric field strength converted into the voltage
A / D conversion means for converting to a D-converted value, a UW detection unit for detecting UW from received data,
The D-converted value is compared with a preset threshold value.
Reception electric field level comparison control means for opening a W detection window; identification code coincidence detection means for comparing an identification code of a base station in received data with an identification code of a preset desired base station; When the detection results of the detection means do not match, the synchronization control means for automatically opening the UW detection window of the UW detection unit immediately, and when the identification codes match according to the comparison result of the identification code match detection means, A radio unit control means for shutting off the power of the radio unit immediately after the end of the reception to the end of the burst is provided. By combining the first embodiment, the third embodiment and the fourth embodiment, a high Even when a low electric field level burst is received in front of a received electric field level burst, a high received electric field level burst If it is determined that the received burst is not a burst from the desired base station, the UW detection window is opened immediately after the determination, so that the UW detection window is opened in front of the burst of the desired base station. Even if the bursts of the base stations are overlapping, it is possible to improve the reception characteristics by enabling the UW detection of the bursts of the desired base station, and to determine that the received burst is a burst from the desired base station. if you did this,
By automatically turning off the power of the radio unit immediately after the end of the reception until the end of the burst, the unnecessary phase of the clock is prevented by not performing an unnecessary reception operation, and the frame synchronization is protected. This has the effect of reducing power consumption.

A TDMA digital mobile communication apparatus according to the present invention is a radio section for receiving and amplifying radio waves of a specific frequency, and demodulation for controlling enable / disable of a bit synchronization operation. A UW detection unit for detecting a UW from the received data; an identification code coincidence detecting means for comparing an identification code of a base station in the received data with a preset identification code of a desired base station; When the identification codes match according to the detection result of the match detection means, the bit synchronization operation is automatically disabled immediately after the end of the reception until the end of the burst by hardware control,
When the UW detection window is automatically closed and the identification code does not match, when the identification code matches according to the comparison result between the synchronization control means for automatically opening the UW detection window automatically and the identification code match detection means, Is provided with a radio unit control means for immediately turning off the power of the radio unit after the reception is completed up to the end of the burst. By combining the second embodiment, the third embodiment and the fourth embodiment, If it is determined that the received burst is a burst from a desired base station, the bit synchronization operation is automatically disabled immediately after the end of the reception up to the end of the burst by hardware control, and the UW detection window is closed. By doing so, even if another burst exists immediately after a burst from the desired base station, The UW detection window can be opened immediately after the discrimination that the received burst is not a burst from the desired base station when the received burst is not a burst from the desired base station. Even when a burst of another base station overlaps a burst of a base station, the UW detection of the burst of the desired base station can be performed and the reception characteristics can be improved. When it is determined that the burst is from the station, the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst. And protects frame synchronization and reduces power consumption.

According to a fifteenth aspect of the present invention, the TDMA digital mobile communication apparatus receives and amplifies a radio wave of a specific frequency, and converts the electric field strength of the received data received from the base station into a voltage. A radio unit for converting the value into a value, a demodulation unit for controlling enable / disable of the bit synchronization operation, and an A / D converter for converting the received electric field strength converted into the voltage value into an A / D converted value at regular time intervals. Means, a UW detection unit for detecting UW from the received data, and comparing the A / D converted value of the received electric field strength with a preset threshold value, and as a result of the comparison, the received electric field strength is higher than the threshold value Only in the case, the reception electric field level comparison control means for opening the UW detection window of the UW detection unit, and compares the identification code of the base station in the reception data with the identification code of the preset desired base station. And another code match detection unit, when the identification code by a detection result of the identification code match detection unit match, automatically disabling the bit synchronizing operation immediately after the end of reception to the burst trailing edge under the control of hardware,
When the UW detection window is automatically closed and the identification code does not match, when the identification code matches according to the comparison result between the synchronization control means for automatically opening the UW detection window automatically and the identification code match detection means, Is provided with a radio section control means for immediately turning off the power of the radio section after the end of the reception to the end of the burst. Embodiments 1, 2, 3 and 4 By combining 4 with the above, it is possible to receive a burst of a high reception electric field level even in a case where a burst of a low electric field level is received in front of a burst of a high reception electric field level. If it is determined that the received burst is a burst from the desired base station, it is automatically controlled to the end of the burst immediately after reception by hardware control. By disabling the bit synchronization operation and closing the UW detection window, even if another burst exists immediately after a burst from the desired base station, the clock for the desired base station can be changed. The phase and frame synchronization can be protected, and when it is determined that the received burst is not a burst from the desired base station, the UW detection window is opened immediately after the determination, so that the desired base station can be protected. Even when bursts of another base station overlap each other in front of the burst, it is possible to improve the reception characteristics by enabling the UW detection of the burst of the desired base station, and furthermore, the reception burst is transmitted from the desired base station. If it is determined that the signal is a burst, the power of the radio unit is automatically turned off immediately after the end of reception until the end of the burst. By which is adapted to have the effect that it is possible to protect the preventing and frame synchronization the phase shift of the clock by not extra reception operation, to reduce power consumption.

In the communication method of the TDMA digital mobile communication according to the invention of claim 16 of the present invention, the strength of the electric field strength of the data received from the base station is converted into a voltage value and converted into the voltage value. The received electric field strength is converted into an A / D conversion value at regular time intervals,
The UW detection window is opened to detect the UW only when the A / D conversion value of the received electric field strength is higher than the threshold value based on the comparison result. UW detection circuit UW detection circuit only when the reception electric field level is higher than the threshold value
By opening the detection window, high level reception can be performed even when a burst of a high reception electric field level is overlapped by a burst of a low electric field level from the front during level boarding. This has the effect that a burst at the electric field level can be received.

The communication method of the TDMA digital mobile communication according to the invention of claim 17 of the present invention compares an identification code of a base station in received data with a predetermined identification code of a desired base station. When the identification code of the received data matches the preset identification code according to the result of the comparison, the bit synchronization operation is automatically disabled immediately after the end of the reception until the end of the burst by hardware control, and the UW detection is performed. The window is automatically closed, and when it is determined that the received burst is a burst from the desired base station at the time of reception at the designated base station, reception is terminated to the end of the burst by hardware control. Immediately after that, the bit synchronization operation is automatically disabled and the UW detection window is closed, Even if immediately after the burst from the base station such as another burst is present, has the effect that it is possible to protect the clock phase and frame synchronization to the desired base station.

The communication method of TDMA digital mobile communication according to the invention of claim 18 of the present invention compares the identification code of the base station in the received data with the identification code of the desired base station set in advance. When the comparison result shows that the identification code of the received data does not match the preset identification code, the UW detection window is automatically opened immediately. If it is determined that the burst is not a burst from the desired base station, the UW detection window is opened immediately after the determination, so that the burst of another base station overlaps the burst of the desired base station. In this case, the UW detection of the burst of the desired base station can be performed to improve the reception characteristics.

In the communication method of the TDMA digital mobile communication according to the nineteenth aspect of the present invention, a radio section receives and amplifies a radio wave of a specific frequency, and transmits a radio signal having a base station identification code included in the received data. The identification code of the desired base station set in advance is compared, and when the identification code of the received data matches the identification code set in advance as a result of the comparison, the reception of the radio unit is immediately performed after the end of reception to the end of the burst. The power is automatically turned off, and when receiving a designated base station, if it is determined that the received burst is a burst from a desired base station, it is automatically turned to the end of the burst immediately after the end of reception. By turning off the power of the radio unit, unnecessary reception operation is not performed to prevent clock phase shift, protect frame synchronization, and reduce power consumption. Such an action can be reduced.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIG. FIG. 1 is a block diagram showing a configuration of a TDMA digital mobile communication device according to an embodiment of the present invention. (Embodiment 1) First, a configuration of a TDMA digital mobile communication device (hereinafter, also referred to as a mobile station) in Embodiment 1 of the present invention will be described with reference to FIG. In FIG. 1, 1 is a reception system of a TDMA digital mobile communication device, 2 is an antenna, 3 is a radio unit, 4 is a demodulation unit, 5 is a unique word (hereinafter referred to as UW) detection unit, and 6 is a data processing unit. , 7 is a reception data buffer, 8 is a control unit, 9 is A
The / D conversion means 10 is a reception electric field level comparison control means.

Next, with reference to FIG. 1, the details and functions of the configuration of the TDMA digital mobile communication apparatus according to the first embodiment will be described. The antenna 2 transmits and receives radio waves in a specific frequency band. The radio unit 3 receives and amplifies radio waves of a specific frequency, down-converts to an intermediate frequency, and outputs it. The demodulation unit 4 decodes the received data into a digital signal, and also operates as a bit synchronization that extracts a clock component of the received data and synchronizes a clock phase used in the TDMA processing unit with the base station. The enable / disable control of the bit synchronization operation is performed by the control unit 8 described later or automatically performed by the received electric field level comparison control unit 10 described later.

The unique word detector 5 detects a UW bit pattern for establishing frame synchronization from the data string of the received data. The UW detection permission section in which the UW detection is permitted is controlled by the control unit 8 described later.
UW detection permission section (UW detection window open section)
Only when a UW bit pattern is detected within the above, it is regarded as UW detection. Also, according to the UW detection timing, T
A counter for controlling the operation timing of the entire DMA processing unit (hereinafter referred to as a synchronization counter) is reset and initialized, and the entire TDMA processing unit is synchronized with the partner station and operated at that timing.

The data processing section 6 performs descrambling processing, data error detection / error correction, and confidential processing on received data. The data processing unit 6 also determines whether the received data is normal data or abnormal data by performing a data check such as a CRC check, and outputs the determination result to the control unit 8 described later. The reception data buffer 7 is storage means for storing reception data that has been subjected to data processing after decoding.

The control section 8 is a means for controlling each section of the receiving system. The A / D converter 9 measures the intensity of the electric field of the received data received by the wireless unit 3 with the wireless unit 3 and converts it into a voltage value. The voltage value is received and A / D converted. A / D at regular time intervals during level boarding
Perform the conversion. The reception electric field level comparison control means 10 compares an A / D conversion value obtained by A / D conversion of the electric field strength of the reception data with a threshold value set in advance by the control unit, and automatically receives the comparison result. This is means for controlling the UW detection window of the UW detection unit 5.

Next, the operation of the TDMA digital mobile communication device according to the first embodiment will be described with reference to FIG. First, the control unit 8 sets a threshold value in the reception electric field level comparison control unit 9 in advance before starting the level boarding operation. The reception electric field level comparison control means 10 compares the A / D conversion value obtained from the A / D conversion means 9 with the threshold value set by the control means 8 during the level boarding operation, and determines the A / D conversion value (reception). Only when the electric field level is higher than the threshold value, the UW detection unit 5 is controlled to open the UW detection window. When the A / D conversion value (reception electric field level) is lower than the threshold value, control is performed so that the UW detection window of the UW detection unit 5 is closed.

By performing such an operation, it is possible to receive a burst having a high reception electric field level even when a burst having a low reception electric field level is superimposed on a burst ahead of a burst having a high reception electric field level. Become. As a threshold value set by the control unit 8 to the reception electric field level comparison control means 10 at the time of level boarding, a high level is initially set, and a level boarding operation is performed once.
If no base station is able to capture, it is advisable to repeat the operation of resetting the threshold slightly lower and then performing level boarding again. Also, the moving average may be used as the A / D conversion value used for comparison with the threshold value in the reception electric field level comparison control means 10.

(Embodiment 2) Next, a configuration of a TDMA digital mobile communication apparatus (hereinafter, also referred to as a mobile station) according to Embodiment 2 of the present invention will be described with reference to FIG. In FIG. 1, 1 is a receiving system of a TDMA digital mobile communication device, 2 is an antenna, 3 is a radio unit,
Is a demodulator, 5 is a unique word (hereinafter referred to as UW)
A detection unit, 6 is a data processing unit, 7 is a reception data buffer,
Reference numeral 8 denotes a control unit, 9 denotes A / D conversion means, 11 denotes identification code coincidence detection means, and 12 denotes synchronization control means.

Next, with reference to FIG. 1, the details and functions of the configuration of the TDMA digital mobile communication apparatus according to the second embodiment will be described. The antenna 2 transmits and receives radio waves in a specific frequency band. The radio unit 3 receives and amplifies radio waves of a specific frequency, down-converts to an intermediate frequency, and outputs it. The demodulation unit 4 decodes the received data into a digital signal, and also operates as a bit synchronization that extracts a clock component of the received data and synchronizes a clock phase used in the TDMA processing unit with the base station. The enable / disable control of the bit synchronization operation is performed by the control unit 8 described later or automatically performed by the received electric field level comparison control unit 12 described later.

The unique word detector 5 detects a UW bit pattern for establishing frame synchronization from the data string of the received data. The UW detection permission section in which UW detection is permitted is controlled by the control unit 8 described later or the synchronization control unit 12 described later, and the UW detection permission section (U
Only when a UW bit pattern is detected within the W detection window open section) is UW detected. The UW detection timing resets and initializes a counter (hereinafter referred to as a synchronous counter) for controlling the operation timing of the entire TDMA processing unit, synchronizes the entire TDMA processing unit with the partner station, and operates at the timing. Let it.

The data processing section 6 performs descrambling processing, data error detection / error correction, confidential processing, and the like on received data. The data processing unit 6 also determines whether the received data is normal data or abnormal data by performing a data check such as a CRC check, and outputs the determination result to the control unit 8 described later. The reception data buffer 7 is storage means for storing reception data that has been subjected to data processing after decoding.

The control section 8 is a means for controlling each section of the receiving system. The A / D conversion means 9 is a means for measuring the intensity of the electric field of the received data received by the wireless unit 3 with the wireless unit 3 and converting the same into a voltage value, receiving the voltage value and performing A / D conversion. The identification code coincidence detecting means 11 is a means for comparing the identification code in the received data with the identification code of a desired base station preset by the control unit.

Immediately after the reception to the end of the burst is completed, the synchronization control means 12 automatically performs the UW detection window of the UW detection section 5 and the bit synchronization operation of the demodulation section 4 based on the detection result of the identification code coincidence detection means 11. For example, when the received burst is determined to be a burst from a desired base station because the identification codes match, if the received burst is determined to be the burst from the desired base station, it is automatically controlled immediately after the end of the reception up to the end of the burst by hardware control. Disable bit sync operation,
In addition, control is performed to close the UW detection window.

Next, the operation of the TDMA digital mobile communication apparatus according to the second embodiment will be described with reference to FIG. First, the control unit 8 sets an identification code of a desired base station in the identification code coincidence detecting means 11 before entering the receiving operation of the designated base station. When the UW detection unit 5 detects UW during the reception operation of the designated base station, the identification code coincidence detection unit 11 compares the data corresponding to the identification code of the received burst with the desired base station preset by the control unit 8. The identification code is compared in real time. If the comparison results match, the synchronization control unit 12 automatically closes the UW detection window of the UW detection unit 5 by hardware control, not by software control, immediately after receiving the end of the burst, Control is performed to disable the bit synchronization operation of the demodulation unit 4.

By performing such an operation, the bit synchronization operation can be automatically disabled immediately after the burst from the desired base station is received, and the UW detection window can be closed. Even in the case where another burst exists immediately after the burst from the station, the clock phase shift and the frame synchronization shift can be prevented, and the clock phase and the frame synchronization can be protected.

(Embodiment 3) Next, a configuration of a TDMA digital mobile communication apparatus (hereinafter, also referred to as a mobile station) according to Embodiment 3 of the present invention will be described with reference to FIG. In FIG. 1, 1 is a receiving system of a TDMA digital mobile communication device, 2 is an antenna, 3 is a radio unit,
Is a demodulator, 5 is a unique word (hereinafter referred to as UW)
A detection unit, 6 is a data processing unit, 7 is a reception data buffer,
Reference numeral 8 denotes a control unit, 9 denotes A / D conversion means, 11 denotes identification code coincidence detection means, and 12 denotes synchronization control means.

Next, the details and functions of the configuration of the TDMA digital mobile communication device according to the third embodiment will be described with reference to FIG. The antenna 2 transmits and receives radio waves in a specific frequency band. The radio unit 3 receives and amplifies radio waves of a specific frequency, down-converts to an intermediate frequency, and outputs it. The demodulation unit 4 decodes the received data into a digital signal, and also operates as a bit synchronization that extracts a clock component of the received data and synchronizes a clock phase used in the TDMA processing unit with the base station. The enable / disable control of the bit synchronization operation is performed by the control unit 8 described later or automatically performed by the received electric field level comparison control unit 12 described later.

The unique word detector 5 detects a UW bit pattern for establishing frame synchronization from the data string of the received data. The UW detection permission section in which UW detection is permitted is controlled by the control unit 8 described later or the synchronization control unit 12 described later, and the UW detection permission section (U
Only when a UW bit pattern is detected within the W detection window open section) is UW detected. The UW detection timing resets and initializes a counter (hereinafter referred to as a synchronous counter) for controlling the operation timing of the entire TDMA processing unit, synchronizes the entire TDMA processing unit with the partner station, and operates at the timing. Let it.

The data processing section 6 performs descrambling processing, data error detection / error correction, confidential processing, and the like on received data. The data processing unit 6 also determines whether the received data is normal data or abnormal data by performing a data check such as a CRC check, and outputs the determination result to the control unit 8 described later. The reception data buffer 7 is storage means for storing reception data that has been subjected to data processing after decoding.

The control section 8 is means for controlling each section of the receiving system. The A / D conversion means 9 is a means for measuring the intensity of the electric field of the received data received by the wireless unit 3 with the wireless unit 3 and converting the same into a voltage value, receiving the voltage value and performing A / D conversion. The identification code coincidence detecting means 11 is a means for comparing the identification code in the received data with the identification code of a desired base station preset by the control unit. When the detection result of the identification code coincidence detecting means 11 does not match, the synchronization control means 12
This is a means for automatically opening the UW detection window of the UW detection unit 5.

Next, the operation of the TDMA digital mobile communication device according to the third embodiment will be described with reference to FIG. First, the control unit 8 sets an identification code of a desired base station in the identification code coincidence detecting means 11 before entering the designated base station receiving operation. UW during reception of specified base station
When the detection unit 5 detects UW, the identification code match detection unit 1
1 compares the data corresponding to the identification code of the burst with the identification code of the desired base station set in the identification code coincidence detecting means 11 by the control means 8.

When the comparison result indicates a mismatch, the synchronization control means 12 controls the UW detection window of the UW detector 5 to open immediately after the mismatch is detected. Thus, even when a burst of another base station overlaps and is received ahead of a burst of a desired base station, the UW of the burst of the desired base station is
Can be detected, and the receiving characteristics can be improved.

(Embodiment 4) Next, a configuration of a TDMA digital mobile communication apparatus (hereinafter, also referred to as a mobile station) according to Embodiment 4 of the present invention will be described with reference to FIG. In FIG. 1, 1 is a receiving system of a TDMA digital mobile communication device, 2 is an antenna, 3 is a radio unit,
Is a demodulator, 5 is a unique word (hereinafter referred to as UW)
A detection unit, 6 is a data processing unit, 7 is a reception data buffer,
Reference numeral 8 denotes a control unit, 9 denotes A / D conversion means, and 10 denotes a reception electric field level comparison control means.

Next, with reference to FIG. 1, the configuration details and functions of the TDMA digital mobile communication apparatus according to the fourth embodiment will be described. The antenna 2 transmits and receives radio waves in a specific frequency band. The radio unit 3 receives and amplifies radio waves of a specific frequency, down-converts to an intermediate frequency, and outputs it. The demodulation unit 4 decodes the received data into a digital signal, and also operates as a bit synchronization that extracts a clock component of the received data and synchronizes a clock phase used in the TDMA processing unit with the base station. The enable / disable control of the bit synchronization operation is performed by the control unit 8 described later.

The unique word detector 5 detects a UW bit pattern for establishing frame synchronization from the data string of the received data. The UW detection permission section in which the UW detection is permitted is controlled by the control unit 8 described later.
UW detection permission section (UW detection window open section)
Only when a UW bit pattern is detected within the above, it is regarded as UW detection. Also, according to the UW detection timing, T
A counter for controlling the operation timing of the entire DMA processing unit (hereinafter referred to as a synchronization counter) is reset and initialized, and the entire TDMA processing unit is synchronized with the partner station and operated at that timing.

The data processing section 6 performs descrambling processing, data error detection / error correction, and confidential processing on received data. The data processing section 6 converts received data into normal data. It also determines whether the data is present or abnormal, and outputs the result of the determination to the control unit 8 described later. The reception data buffer 7 is storage means for storing reception data that has been subjected to data processing after decoding.
The control unit 8 is a unit that controls each unit of the receiving system.

The A / D converter 9 measures the electric field strength of the received data received by the radio unit 3 with the radio unit 3 and converts it into a voltage value. The voltage value is received and A / D converted. It is. The identification code coincidence detecting means 11 is a means for comparing the identification code in the received data with the identification code of a desired base station preset by the control unit. The radio control means 13 terminates reception up to the end of the burst when the detection result of the identification code coincidence detection means 11 coincides with the reception of the designated base station, and immediately thereafter, automatically turns off the power of the radio unit 3 To control off.

Next, the operation of the TDMA digital mobile communication apparatus according to the fourth embodiment will be described with reference to FIG. First, the control unit 8 sets an identification code of a desired base station in the identification code coincidence detecting means 11 before entering the receiving operation of the designated base station. U during receiving operation of the designated base station
When the W detection unit 5 detects the UW, the identification code match detection means 11 outputs data corresponding to the identification code of the burst and the identification code of the desired base station set in the identification code match detection means 11 by the control means 8. Compare with If the result of the comparison is a match, the wireless control unit 13 automatically turns off the power of the wireless unit 3 immediately after receiving the signal up to the end of the burst.
Thus, by avoiding unnecessary receiving operation, it is possible to prevent clock phase shift, protect frame synchronization, and reduce power consumption.

(Fifth Embodiment) Next, a TDMA digital mobile communication apparatus according to a fifth embodiment will be described with reference to FIG. The fifth embodiment is a case where the first and second embodiments are combined to receive a signal such that a low electric field level burst overlaps a high received electric field level burst. Can also receive a burst with a high received electric field level, and if it is determined that the received burst is a burst from a desired base station, automatically by the hardware control up to the end of the burst immediately after the end of reception. By disabling the bit synchronization operation and closing the UW detection window, even if another burst exists immediately after a burst from the desired base station, the phase of the clock for the desired base station can be reduced. And frame synchronization can be protected. Since the details of the configuration and operation of the TDMA digital mobile communication device according to the fifth embodiment have been described in the first and second embodiments, further detailed description will be omitted.

(Embodiment 6) Next, a TDMA digital mobile communication apparatus according to Embodiment 6 will be described with reference to FIG. The sixth embodiment is a case where the first embodiment and the third embodiment are combined to receive a signal such that a low electric field level burst overlaps a high reception electric field level burst. Also, it is possible to receive a burst having a high reception electric field level, and when it is determined that the reception burst is not a burst from a desired base station, the UW detection window is opened immediately after the determination, thereby making it possible to receive the desired burst. Even when a burst of another base station overlaps with a burst of another base station, UW detection of a burst of a desired base station can be performed and reception characteristics can be improved. The details of the configuration and operation of the TDMA digital mobile communication device according to the sixth embodiment have been described in the first and third embodiments, and therefore a more detailed description will be omitted.

(Embodiment 7) Next, a TDMA digital mobile communication apparatus according to Embodiment 7 will be described with reference to FIG. The seventh embodiment is a case where the first embodiment and the fourth embodiment are combined to receive a signal such that a low electric field level burst overlaps a high reception electric field level burst. Can also receive a burst of a high reception electric field level, and if it is determined that the reception burst is a burst from a desired base station, the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst. By setting to off, it is possible to prevent clock phase shift by not performing unnecessary reception operation, protect frame synchronization, and reduce power consumption. still,
Since the details of the configuration and operation of the TDMA digital mobile communication device according to the seventh embodiment have been described in the first and fourth embodiments, further detailed description will be omitted.

(Eighth Embodiment) Next, a TDMA digital mobile communication apparatus according to an eighth embodiment will be described with reference to FIG. In the eighth embodiment, by combining the second embodiment and the third embodiment, when it is determined that the received burst is a burst from a desired base station, reception is performed up to the rear end of the burst by hardware control. By automatically disabling the bit synchronization operation immediately after the termination and closing the UW detection window, even if another burst exists immediately after the burst from the desired base station, the desired operation can be performed. By being able to protect the clock phase and frame synchronization with respect to the base station, and if the received burst is determined not to be a burst from the desired base station, the UW detection window is opened immediately after the determination, so that Even if the burst of another base station is overlapping the burst of the desired base station, Reception characteristics by enabling UW detection of bursts can be improved. Note that the TDMA in the eighth embodiment is used.
Details of the configuration and operation of the digital mobile communication system
Since it has been described in the second and third embodiments, further detailed description will be omitted.

(Embodiment 9) Next, a TDMA digital mobile communication apparatus according to Embodiment 9 will be described with reference to FIG. The ninth embodiment combines the second embodiment and the fourth embodiment, and when it is determined that a received burst is a burst from a desired base station, reception is performed up to the rear end of the burst by hardware control. By automatically disabling the bit synchronization operation immediately after the termination and closing the UW detection window, even if another burst exists immediately after the burst from the desired base station, the desired operation can be performed. The clock phase and the frame synchronization with respect to the base station can be protected, and when it is determined that the received burst is a burst from the desired base station, the power of the radio unit is automatically automatically set to the end of the burst immediately after the end of reception. Is set to off, clock phase shift is prevented by not performing unnecessary reception operation, and frame To protect the period, it is possible to reduce power consumption. The details of the configuration and operation of the TDMA digital mobile communication device in the ninth embodiment are described in the second embodiment.
And since it has been described in Embodiment 4, further detailed description will be omitted.

(Tenth Embodiment) Next, a TDMA digital mobile communication apparatus according to a tenth embodiment will be described with reference to FIG. Embodiment 10
By combining Embodiment 3 and Embodiment 4, when it is determined that the received burst is not a burst from a desired base station, the UW detection window is opened immediately after the determination, Even when a burst of another base station overlaps a burst of a desired base station, UW detection of a burst of the desired base station can be performed and reception characteristics can be improved. When it is determined that the burst is from the base station, the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst. The phase shift can be prevented, the frame synchronization can be protected, and the power consumption can be reduced. In the tenth embodiment,
Since the details of the configuration and operation of the TDMA digital mobile communication device in the above are described in the third and fourth embodiments, further detailed description will be omitted.

Embodiment 11 Next, a TDMA digital mobile communication apparatus according to Embodiment 11 will be described with reference to FIG. Embodiment 11
By combining the first, second, and third embodiments, even in a case where a burst of a low electric field level is received so as to overlap a burst of a high electric field level, If it is determined that the received burst is a burst from a desired base station, the burst is automatically transmitted to the end of the burst by hardware control immediately after the end of the burst. Disable sync operation,
Also, by closing the UW detection window, even if another burst exists immediately after a burst from the desired base station, it is possible to protect the clock phase and frame synchronization for the desired base station. If it is determined that the received burst is not a burst from the desired base station, the UW detection window is opened immediately after the determination, so that another base station can be located ahead of the burst of the desired base station. Even if the bursts are overlapping, the UW of the burst of the desired base station
Detection can be performed to improve reception characteristics.
The details of the configuration and operation of the TDMA digital mobile communication device in Embodiment 11 are described in Embodiment 1,
Since it has been described in the second and third embodiments, further detailed description will be omitted.

(Twelfth Embodiment) Next, a TDMA digital mobile communication apparatus according to a twelfth embodiment will be described with reference to FIG. Embodiment 12
By combining the first, second and fourth embodiments, even in a case where a burst of a low electric field level is received so as to overlap a burst of a high electric field level, If it is determined that the received burst is a burst from a desired base station, the burst is automatically transmitted to the end of the burst by hardware control immediately after the end of the burst. Disable sync operation,
Also, by closing the UW detection window, even if another burst exists immediately after a burst from the desired base station, it is possible to protect the clock phase and frame synchronization for the desired base station. If it is determined that the received burst is a burst from the desired base station, the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst. By not operating, the phase shift of the clock can be prevented, the frame synchronization can be protected, and the power consumption can be reduced. The details of the configuration and operation of the TDMA digital mobile communication device according to the twelfth embodiment are described in the first and second embodiments.
And since it has been described in Embodiment 4, further detailed description will be omitted.

(Thirteenth Embodiment) Next, a TDMA digital mobile communication apparatus according to a thirteenth embodiment will be described with reference to FIG. Embodiment 13
By combining the first, third, and fourth embodiments, even in a case where a burst of a low electric field level is received so as to overlap a burst of a high received electric field level, When a burst having a high reception electric field level can be received, and it is determined that the received burst is not a burst from a desired base station, the UW detection window is opened immediately after the determination, whereby a desired Even when a burst of another base station overlaps a burst of a base station, UW detection of a burst of a desired base station can be performed and reception characteristics can be improved. When it is judged that the burst is from the station, the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst. By the can with a phase shift of the clock protecting and and frame synchronization prevented by not extra reception operation, to reduce power consumption. The details of the configuration and operation of the TDMA digital mobile communication device according to the thirteenth embodiment are described in the first, third, and fourth embodiments, and therefore, a further detailed description is omitted. I do.

(Embodiment 14) Next, a TDMA digital mobile communication apparatus according to Embodiment 14 will be described with reference to FIG. Embodiment 14
Is a combination of the second, third and fourth embodiments, when it is determined that a received burst is a burst from a desired base station, the reception is terminated to the end of the burst by hardware control. By automatically disabling the bit synchronization operation immediately afterward and closing the UW detection window, even if another burst exists immediately after a burst from the desired base station, the desired base station can be used. It is possible to protect the clock phase and frame synchronization with respect to the station, and furthermore, when it is determined that the received burst is not a burst from the desired base station, the UW detection window is opened immediately after the determination, so that the desired Even if the burst of another base station is overlapping the burst of another base station, If the to allow UW detection of the burst can improve the reception characteristics, further received burst is determined to be a burst from a desired base station,
By automatically turning off the power of the radio unit immediately after the end of the reception until the end of the burst, the unnecessary phase of the clock is prevented by not performing an unnecessary reception operation, and the frame synchronization is protected. Power consumption can be reduced. Note that the TDM in the fourteenth embodiment
Details of the configuration and operation of the A-system digital mobile communication device have been described in the second, third, and fourth embodiments, and therefore, a further detailed description will be omitted.

(Embodiment 15) Next, a TDMA digital mobile communication apparatus according to Embodiment 15 will be described with reference to FIG. Embodiment 15
Is such that, by combining the first, second, third, and fourth embodiments, a burst having a low electric field level is received in front of a burst having a high received electric field level. Even in this case, a burst having a high reception electric field level can be received, and if it is determined that the received burst is a burst from a desired base station, immediately after the end of the reception to the rear end of the burst by hardware control Automatically disables the bit synchronization operation and closes the UW detection window so that even if another burst exists immediately after a burst from the desired base station, Clock phase and frame synchronization with respect to If it is determined that the discrimination immediately after UW
By making the detection window open, even if a burst of another base station overlaps a burst of a desired base station, the burst of the desired base station can be detected by UW detection. The characteristics can be improved, and when it is determined that the received burst is a burst from a desired base station, the power of the radio unit is automatically turned off immediately after the end of the reception until the end of the burst. This can prevent a clock phase shift by preventing unnecessary reception operation, protect frame synchronization, and reduce power consumption. The details of the configuration and operation of the TDMA digital mobile communication device according to the fifteenth embodiment are described in the first, second, third, and fourth embodiments. Detailed description is omitted.

[0090]

According to the present invention, the UW detection window of the UW detection circuit is opened only when the reception electric field level is higher than the threshold value as a result of the comparison by the reception electric field level comparison control means. Thus, during level boarding, even when a burst of a low electric field level is received so as to overlap a burst of a high received electric field level, a burst of a high received electric field level is received. be able to.

Further, the present invention compares the base station identification code set in advance with the base station identification code in the actually received data in real time at the time of reception operation of the designated base station, and If the codes match, the bit synchronization operation is automatically disabled by hardware control rather than software control immediately after the end of the burst reception, and the UW detection window can be closed. By providing another burst immediately after the burst, it is possible to prevent the clock phase shift and the frame synchronization shift, thereby protecting the clock phase and the frame synchronization.

In addition, the present invention compares the preset base station identification code with the base station identification code in the actually received data in real time, especially during the reception operation of the designated base station, and determines When the base station identification code does not match the preset base station identification code, the UW detection window is controlled to be opened immediately after the detection of the mismatch, so that the desired base station can be identified. Even when a burst or an interfering wave of another base station overlaps the burst, it is possible to detect the UW of the burst of the desired base station and improve the reception characteristics.

Also, the present invention compares a preset base station identification code with a base station identification code in actually received data in real time, especially during a receiving operation of a designated base station, to determine a base station identification code. If the codes match, after the reception of the burst is completed, the power of the radio unit is automatically turned off and the radio unit is stopped by hardware control instead of software control to reduce power consumption and reduce unnecessary data. It is possible to prevent a clock phase shift and a frame synchronization shift due to reception.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a TDMA digital mobile communication device according to an embodiment of the present invention;

FIG. 2 is a block diagram showing a configuration of a receiving system of a conventional TDMA digital mobile communication device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Receiving system of TDMA digital mobile communication device 2 Antenna 3 Radio unit 4 Demodulation unit 5 UW detection unit 6 Data processing unit 7 Received data buffer 8 Control unit 9 A / D conversion unit 10 Reception electric field level comparison control unit 11 Identification code Match detection means 12 Hardware 13 Radio section control means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K028 BB06 CC05 DD01 DD02 HH00 MM08 MM17 NN05 NN12 NN31 SS04 SS29 5K047 AA01 CC06 GG00 HH12 HH21 HH44 JJ02 5K067 AA23 AA43 CC04 DD19 DD25 DD44 EE02 EE10 KK

Claims (19)

[Claims] 1. A radio unit for converting the strength of an electric field strength of received data received from a base station into a voltage value, and converting the received electric field strength converted into the voltage value into an A / D conversion value at regular time intervals. A / D converting means, a UW detection unit for detecting a unique word (UW) from the received data, and comparing the A / D converted value of the received electric field strength with a preset threshold value, based on the comparison result. A reception electric field level comparison control means for controlling an operation of a UW detection window of the UW detection section,
A TDMA digital mobile communication device characterized in that a UW detection window of a UW detection unit is opened only when an A / D conversion value of the received electric field strength is higher than the threshold value as a result of the comparison. 2. A demodulation unit for controlling enable / disable of a bit synchronization operation, a UW detection unit for detecting UW from received data, an identification code of a base station in the received data and a preset desired base station Identification code comparison means for comparing the identification code with the identification code, and synchronization control means for automatically controlling the UW detection window of the UW detection part and the bit synchronization operation of the demodulation part based on the detection result of the identification code coincidence detection means. As a result of the comparison of the identification codes by the identification code match detection means, when the identification code of the received data matches the predetermined identification code, the demodulation is performed immediately after the end of the reception up to the end of the burst under the control of the synchronization control means. Automatically disables the bit synchronization operation of the UW detection unit.
A TDMA digital mobile communication device, wherein a W detection window is automatically closed. 3. A UW detector for detecting UW from received data, identification code coincidence detecting means for comparing an identification code of a base station in the received data with a preset identification code of a desired base station, Synchronization control means for automatically controlling the UW detection window of the UW detection unit based on the detection result of the identification code coincidence detection means. A TDMA digital mobile communication device characterized in that, when the set identification code does not match, the UW detection window of the UW detection unit is automatically opened immediately. 4. A radio section for receiving and amplifying radio waves of a specific frequency, and identification code coincidence detecting means for comparing an identification code of a base station in received data with a preset identification code of a desired base station. And a radio section control means for controlling the power supply of the radio section based on the comparison result of the identification code match detection means. The TDMA digital mobile communication device according to claim 1, wherein when the identification code matches, the radio unit control means automatically turns off the power of the radio unit immediately after completion of reception up to the end of the burst. 5. A radio section for converting the intensity of the electric field strength of received data received from a base station into a voltage value, a demodulation section for controlling enable / disable of a bit synchronization operation, and a reception section converted into the voltage value. A / D at constant time intervals
A / D conversion means for converting to a conversion value, and U
A UW detector for detecting W, and A / D of the received electric field strength
The converted value is compared with a preset threshold value.
Reception electric field level comparison control means for opening a detection window, identification code coincidence detection means for comparing an identification code of a base station in received data with a preset identification code of a desired base station, and the identification code coincidence detection When the identification codes match according to the detection result of the means, the synchronization control means automatically disables the bit synchronization operation immediately after the end of the reception to the end of the burst by hardware control and automatically closes the UW detection window. A TDMA digital mobile communication device comprising: 6. A radio unit for converting the electric field intensity of received data received from a base station into a voltage value, and converting the received electric field intensity converted into the voltage value into an A / D conversion value at regular time intervals. A / D converting means, a UW detection unit for detecting UW from received data, and comparing the A / D converted value of the received electric field strength with a preset threshold value, and comparing the received electric field strength with the comparison result. Receiving electric field level comparison control means for opening the UW detection window only when the threshold value is higher than the threshold value, and identification code matching for comparing the identification code of the base station in the received data with the identification code of the preset desired base station Detection means; and synchronization control means for automatically opening a UW detection window of the UW detection section immediately when the identification codes do not match according to the detection result of the identification code match detection means. That TDMA scheme digital mobile communication device. 7. A radio unit for receiving and amplifying a radio wave of a specific frequency, converting the intensity of the electric field of the received data into a voltage value, and transmitting the received electric field intensity converted into the voltage value at a predetermined time interval. A / D conversion means for converting each time to an A / D conversion value;
A UW detection unit for detecting UW from received data, comparing the A / D converted value of the received electric field strength with a preset threshold value, and only when the received electric field strength is higher than the threshold value according to the comparison result Reception electric field level comparison control means for opening a UW detection window; identification code coincidence detection means for comparing an identification code of a base station in received data with an identification code of a preset desired base station; A radio section control means for immediately turning off the power of the radio section upon completion of reception up to the end of the burst when a match is found by the comparison result of the detection section; 8. A demodulator for controlling enable / disable of a bit synchronization operation, a UW detector for detecting UW from received data, an identification code of a base station in the received data and a preset desired base station. When the identification codes match according to the detection result of the identification code coincidence detecting means, the bit synchronization operation is automatically performed immediately after the end of the reception to the end of the burst by hardware control. Synchronous control means for automatically disabling the UW detection window, automatically closing the UW detection window, and automatically opening the UW detection window immediately when the identification code does not match. Mobile communication device. 9. A demodulator for controlling enable / disable of a bit synchronization operation, a UW detector for detecting UW from received data, an identification code of a base station in the received data and a preset desired base station. When the identification code matches the identification code according to the detection result of the identification code match detection means, the bit synchronization operation is automatically performed immediately after the end of the reception to the end of the burst by hardware control. When the identification code matches the synchronization control means for automatically disabling and automatically closing the UW detection window and the identification code match detection means,
TD characterized by comprising radio section control means for immediately turning off the power of the radio section upon completion of reception to the end of the burst.
MA type digital mobile communication device. 10. A UW detector for detecting UW from received data, identification code coincidence detecting means for comparing an identification code of a base station in the received data with a predetermined identification code of a desired base station, When the identification codes do not match according to the detection result of the identification code match detection means, the synchronization control means for automatically opening the UW detection window immediately and when the identification codes match according to the comparison result of the identification code match detection means, And a radio unit control means for immediately turning off the power of the radio unit upon completion of reception up to the end of the burst. 11. A radio unit for converting the intensity of the electric field strength of received data received from a base station into a voltage value, a demodulation unit for controlling enable / disable of a bit synchronization operation, and a reception unit converted into the voltage value A /
A / D conversion means for converting to a D-converted value, a UW detection unit for detecting UW from received data,
Receiving electric field level comparison control means for opening the UW detection window of the UW detection unit only when the received electric field strength is higher than the threshold value by comparing the D converted value with a preset threshold value, Identification code matching detection means for comparing the identification code of the base station in the received data with the identification code of the preset desired base station, and when the identification code matches with the detection result of the identification code matching detection means, The bit synchronization operation is automatically disabled immediately after the end of the burst until the end of the burst by hardware control, the UW detection window is automatically closed, and when the identification code does not match, the UW detection window is automatically opened immediately. TDM characterized by comprising synchronous control means for opening the TDM
A type digital mobile communication device. 12. A radio wave of a specific frequency is received and amplified,
A radio unit for converting the intensity of the electric field strength of the received data received from the base station into a voltage value;
A demodulation unit for controlling disable, an A / D conversion unit for converting the received electric field strength converted into the voltage value into an A / D conversion value at regular time intervals, and a UW detection unit for detecting UW from the received data. Receiving electric field level comparison control for comparing the A / D converted value of the received electric field strength with a preset threshold value and opening a UW detection window only when the received electric field strength is higher than the threshold value according to the comparison result Means, identification code coincidence detection means for comparing the identification code of the base station in the received data and the identification code of the preset desired base station,
U is automatically determined based on the detection result of the identification code match detection means.
The UW detection window of the W detection unit and the bit synchronization operation of the demodulation unit are controlled. When the identification codes match, the bit synchronization operation is automatically disabled immediately after the end of the reception to the end of the burst by hardware control, When the identification code matches according to the result of the comparison between the synchronization control means for automatically closing the UW detection window and the identification code match detection means, the radio unit immediately shuts off the power of the radio unit after the end of the reception to the end of the burst. A TDMA digital mobile communication device comprising: a control unit. 13. A radio wave of a specific frequency is received and amplified,
A radio unit for converting the intensity of the electric field intensity of the received data received from the base station into a voltage value, and an A / D for converting the received electric field intensity converted into the voltage value into an A / D conversion value at regular time intervals
Converting means, a UW detection unit for detecting UW from received data, and comparing the A / D converted value of the received electric field strength with a preset threshold value, and comparing the received electric field strength with the threshold value based on the comparison result. Reception electric field level comparison control means for opening the UW detection window only when it is high, and identification code coincidence detection means for comparing the identification code of the base station in the received data with the identification code of the preset desired base station, When the detection result of the identification code match detection means does not match, the identification code matches with the synchronization control means for automatically opening the UW detection window of the UW detection section immediately, and the comparison result of the identification code match detection means. And radio section control means for immediately turning off the power of the radio section after reception is completed up to the end of the burst. . 14. A radio unit for receiving and amplifying radio waves of a specific frequency, a demodulation unit for controlling enable / disable of a bit synchronization operation, and a U unit for detecting UW from received data.
W detection unit, identification code match detection means for comparing the identification code of the base station in the received data with a preset identification code of the desired base station, and the identification code is determined by the detection result of the identification code match detection means. If they match, the bit synchronization operation is automatically disabled immediately after the end of the reception until the end of the burst by hardware control, the UW detection window is automatically closed, and if the identification codes do not match, the U
When the identification code matches according to the result of the comparison between the synchronization control means for automatically opening the W detection window and the identification code match detection means, after the reception ends up to the end of the burst,
A TDMA digital mobile communication device comprising: a radio unit control means for immediately shutting off a power supply of a radio unit. 15. A radio wave having a specific frequency is received and amplified,
A radio unit for converting the intensity of the electric field strength of the received data received from the base station into a voltage value;
A demodulation unit for controlling disable, an A / D conversion unit for converting the received electric field strength converted into the voltage value into an A / D conversion value at regular time intervals, and a UW detection unit for detecting UW from the received data. Comparing the A / D converted value of the reception electric field strength with a preset threshold value, and opening the UW detection window of the UW detection unit only when the reception electric field strength is higher than the threshold value based on the comparison result. Receiving electric field level comparison control means, identification code match detection means for comparing the identification code of the base station in the received data with the identification code of the desired base station set in advance, and the detection result of the identification code match detection means When the identification codes match, the bit synchronization operation is automatically disabled immediately after the end of the reception up to the end of the burst by hardware control, the UW detection window is automatically closed, When another sign of disagreement, immediately U
When the identification code matches according to the result of the comparison between the synchronization control means for automatically opening the W detection window and the identification code match detection means, after the reception ends up to the end of the burst,
A TDMA digital mobile communication device comprising: a radio unit control means for immediately shutting off a power supply of a radio unit. 16. An electric field intensity of received data received from a base station is converted into a voltage value, and the received electric field intensity converted into the voltage value is converted into an A / D conversion value at regular time intervals. The A / D conversion value of the received electric field strength is compared with a preset threshold value, and the A / D converted value of the received electric field strength is determined based on the comparison result.
A communication method for a TDMA digital mobile communication device, comprising the steps of opening a UW detection window and detecting UW only when the D conversion value is higher than a threshold value. 17. An identification code of a base station in received data is compared with a preset identification code of a desired base station, and as a result of the comparison, the identification code of the received data matches the preset identification code. The TD comprises the steps of automatically disabling the bit synchronization operation immediately after the end of the reception up to the end of the burst by hardware control and automatically closing the UW detection window.
Communication method of MA digital mobile communication device. 18. An identification code of a base station in received data is compared with a preset identification code of a desired base station, and as a result of the comparison, a mismatch between the identification code of the received data and the preset identification code is determined. A method of automatically opening a UW detection window immediately when necessary. 19. A radio unit receives and amplifies a radio wave of a specific frequency, compares an identification code of a base station in received data with a preset identification code of a desired base station, and, based on a result of the comparison. When the identification code of the received data matches the identification code set in advance, after the end of reception to the end of the burst,
A communication method for a TDMA digital mobile communication device, comprising: a step of automatically turning off a power of a radio unit immediately.