TW391118B - Communication apparatus - Google Patents

Abstract

In order to provide a communication apparatus for efficiently transmiting data, a modulator of a transmission circuit is controlled by a transmission control circuit for stopping data transmission/receiving when crosstalk noise is at a high level and transmitting data to a receiving circuit only when crosstalk noise is at a low level. Alternatively, the communication apparatus observes temporal change of noise intensity, analyzes the temporal cycle of the observed noise intensity and controls the data transmission rate in synchronization with the analyzed cycle of the noise intensity change.

Description

A7 B7 Cooperation between the central ministry and the private sector

V. Description of the Invention (!) The present invention relates to a communication device. In particular, communication devices that transmit digital signals using twisted pair lines that are prone to mixing noise. Traditional communication devices often communicate at a certain data transmission speed, or look at the transmission wheel before starting communication. The state of the circuit, set the available transmission speed, and then communicate at the determined data transmission speed. Generally speaking, the upper limit of the data transmission speed of a communication device is determined by the SN ratio of the receiving circuit. When the noise level of the mixed transmission circuit changes, the SN ratio changes with the change in the traditional communication device when the SN ratio is high and when the 81 ^ ratio is low. Therefore, if the SN ratio of a communication device that communicates at a predetermined transmission speed changes with time, the transmission error will increase sharply when the SN ratio is low, and sometimes it becomes impossible to communicate. Set the transmission speed before starting communication. The communication device has the disadvantage of determining its transmission speed when the SN ratio is low. Especially when high-speed data communication is performed by telephone subscriber lines in Japan, the existing ping-pong mode ISDN crosstalk noise will greatly reduce the data transmission speed. The 15th line indicates that at the user end, the far-end crosstalk noise and the near-end crosstalk noise are mixed by the induction loop into the state of the induction loop. Generally speaking, the digital transmission method of the telephone line is used, because the near-end crosstalk is larger than the far-end crosstalk. Therefore, how to avoid the positive-end crosstalk becomes an important key to improve the performance of the wheel. The ping-pong mode ISDN multiplexes the downlink signal from the telephone office to the user and the one-line signal from the user to the telephone office as shown in Figure 16, synchronizing the signals of all the loops to avoid 1501 ^ mutual Between

This paper size applies to China National Standards (CNS) A4 specifications (2 丨 0x297 public works, read the item first, and then% '% this page -4- central part of the Ministry * ?:? ^: £ :: industry and consumer cooperation ii 卬聚 A7 ～～ __________ B7__ 5. Description of the Invention (2) End crosstalk. Here, one cycle of the soldier is 2.5 ms. However, the transmission of data other than the ping-pong mode ISDN has nothing to do with the ping-pong cycle, so it cannot be avoided from ping-pong Near-end crosstalk of ISDN. In recent years, due to the popularity of the Internet, a higher speed transfer mode than ISDN is expected, especially the asymmetric digital subscriber line method (ADSL : Asymmetrical Digital Subscriber Line). However, if ADSL and ping-pong mode ISDN are close in the cable, due to the near-end crosstalk of the ping-pong mode ISDN at the user side, the downstream transmission speed of ADSL will be significantly reduced, or the transmission distance It will be significantly shortened. Therefore, 'Traditional communication using ADSL method' in Japan, its scope of application will be limited to a narrow range. Therefore, the main purpose of the present invention is to provide, Only when the crosstalk noise is paid, the data transmission is timely, and the data transmission is performed only when the crosstalk noise level is low, thereby effectively transmitting data to the communication device. Another object of the present invention is to provide a communication device that can communicate with miscellaneous data. A communication device that synchronously controls the speed of data transmission during a period of varying signal strength. A brief explanation of the present invention is to use a transmitter that outputs a digitally modulated signal to a transmission circuit, and a receiver that demodulates the received signal into data. The device for performing high-speed data communication is a device for transmitting data from a transmitter to a transmission circuit, and a state of transmitting and receiving data by the receiver, and a transmission stop of the transmitter that does not transmit data to the transmission circuit. Data status, and the periodic control signal output by the control circuit shifts between the status of sending and receiving data and the status of stopping sending data. Therefore, according to the present invention, since the crosstalk noise level is low-^ ---.------ ^ ------, 玎 ------ ^ i / f '(Please read the notes on the back ^^^ item before filling out this page)

A7 B7 V. Description of the invention (3) The sending and receiving of data, so the data can be effectively transmitted. In a preferred embodiment of the present invention, the transmitter is provided with an input buffer and the receiver is provided with a round-out buffer. The speed of the data transmitted from the transmitter to the receiver is kept constant and does not change with time. Moreover, in a more preferred embodiment, when the transmitter stops transmitting and receiving data, the signal indicating this state is cancelled. When transmitting, the receiver demodulates the modulated signal and recognizes that it is in the state of stopping transmitting data. Moreover, 'the transmitter and the receiver are preferably provided with two sets each, and the round-trip phone uses twisted pair to transmit data in both directions. ^ Among these two sets of transmitters and receivers, data is transmitted from one party to the other. The speed is set to be faster than the data transmission speed from the other party to the other party. In addition, the transmitter is best to use quadrature amplitude modulation to send and receive data, and the orthogonal majority carrier is used for data transmission. Another invention is a communication device for transmitting a digitally modulated signal to a transmission telephone and a receiver for demodulating the received signal into data, and a communication device for high-speed data communication. The receiver is provided for observation A noise observation circuit that changes the noise intensity with time, and a noise analysis circuit that analyzes the periodicity of the observed noise intensity in time, and synchronizes with the period of the analyzed noise intensity change to control its Data transfer speed. Therefore, another invention can analyze the periodicity of the noise intensity in time and control the speed of data transmission, so it is necessary to send a large amount of data when the SN ratio is high. Moreover, it is best to divide a period of noise intensity change into at least two times, and according to each time of division, according to the observed receiver paper size, the state ’s China National Slope (CNS) A4 specification ( 2 丨 0X297mm) (Please read the precautions on the back before filling this page) -6

V. Description of the invention (4) The signal at the end is noise, and the processing speed of the modulation demodulator included in the transmitter and receiver is switched every time. At the same time, another invention is a communication device that outputs a digitally modulated signal to a transmission circuit and a receiver that demodulates the received signal into data to perform high-speed data communication. Periodically synchronized external control signals control data transmission speed. The embodiments of the present disclosure are illustrative and not restrictive at all points. The scope of the present invention is not disclosed by the above description, but is disclosed by the scope of the patent application 'and includes all changes in the same meaning and scope as the scope of the patent application. "The following is a detailed description of the preferred embodiment of the present invention with reference to the drawing. . Fig. 1 is a schematic block diagram of a first embodiment of the present invention. The first embodiment of the present invention has a state of sending and receiving data in the sending circuit 1 to the transmission circuit and being received by the receiving circuit 2 and a stop sending of data that is not sent by the sending circuit to the transmission circuit The function of state transition. Therefore, the transmission circuit 1 includes a modulator 11 and a transmission control circuit 12, and the reception circuit 2 includes a demodulator 21 and a reception control circuit 22. The modulator 11 is used for digitally modulating the input data for communication, and the transmission control circuit 12 sends data through the modulator 11 according to a control signal, or stops sending data. The demodulator 21 of the receiving circuit 2 can demodulate the data transmitted through the transmitting circuit 1 through the transmission circuit, and output the data. The reception control circuit 22 causes the demodulator 21 to demodulate or stops demodulation according to the control signal. Fig. 2 is a block diagram showing a second embodiment of the present invention. In Figure 2, this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (谙 1¾Precautions for reading noodles, and then 'page j, -t Γ A7 til via Only consumer-consumer cooperation. V. Description of the invention (5) The transmitting circuit la contains and temporarily stores the data and supplies it to the modulator. The elastic buffer 13 'the receiving circuit 2a contains and temporarily stores the output of the demodulator 21 and outputs it. The other structure of the elastic buffer 23 is the same as that in the first figure. In this way, 'because the elastic buffer 13' 23 is provided in the transmitting circuit 1a and the receiving circuit 2a, the speed of the transmitted data can be prevented from changing with time. FIG. 3 is a block diagram showing the third embodiment of the present invention. In the third step, the transmission circuit lb includes the multiplexer 14 and the memory 15 in addition to the modulator π and the transmission control circuit 12. The memory 15 is in When the state of sending and receiving data is stopped, information indicating the state is stored in advance. The multiplexer 14 can respond to the selection signal of the control circuit 12, and can select the rotation data when sending, and read the information from the memory 15 when sending is impossible. Supply regulator 丨The modulator n sends the information to the receiving circuit 2b. By this, the modulator n can synchronize with the clock signal of the transmission control circuit 12 and continue its modulation operation. The receiving phone 2b is on the demodulator 21 and receiving control. In addition to the circuit 22, a demultiplexer 24 is included. The demodulator 21 is synchronized with the clock signal of the reception control circuit 22, and continues to demodulate the received signal. The reception control circuit 22 supplies the demultiplexer 24 with a distribution signal. When the demultiplexer 24 is transmitting and receiving data, the signal of the demodulator 21 is used as output data, and it is output from the receiving circuit 2b. When the state of transmitting and receiving data is stopped, it is output to the reception control circuit 22. The reception control circuit 22 may The above-mentioned distribution signal and clock signal are made from the time when the specific information of the memory 15 stored in the transmission circuit lb is received. Thus, the reception circuit 2b can prevent the synchronization with the transmission circuit lb. FIG. 4 shows the first embodiment of the present invention. 4 actual, block diagram of the example. This embodiment III ^ II line-*, · (please first read the precautions on the t side IK 'page)

A7 B7 V. Description of the invention (6 series transmission circuit uses twisted pair communication device, which is composed of central office modem 3 and user's modem 4. The combination of central office modem 3 and user's modem 4 is shown in Figure 3. The transmitting circuit and the receiving circuit shown are formed. That is, the central office modem 3 contains the modulator iia as the transmitting circuit, the transmitting control circuit i2a, the multiplexer 14a, and the memory 15a, and it also contains as receiving The demodulator 21a, the reception control circuit 22a, and the demultiplexer 24a of the circuit include a hybrid circuit (hybrid circuit) for connecting the modulator 11a and the demodulator 21a to the twisted-pair line 5 used as a transmission telephone. ) 6. The client modem 4 also contains a modulator lib as a transmission circuit, a transmission control circuit 12b ′, a multiplexer 14b, and a memory 15b, and also includes a demodulator 21b as a reception circuit for receiving control. The circuit 22b and the demultiplexer 24b include a hybrid circuit 7 for connecting the modulator 111} and the demodulator 211) to the twisted pair 5. The operations of the sending and receiving circuits of the local modem 3 and the client modem 4 shown in Fig. 4 are the same as those in the above Fig. 3, and data can be sent and received in both directions. In addition, when one party stops transmitting and receiving signals, the other party also stops transmitting. No matter whether the transmission speeds of the two sides are the same as the symmetrical type or the faster one is the asymmetric type, the figure 5 shows A diagram of a specific example of a modulation telephone used in the embodiment of the present invention. The modulator shown in FIG. 5 modulates transmission data by orthogonal amplitude modulation. That is, the transmission data is supplied to the encoder ln, and converted into] phase and Phase Q, phase is multiplied by sinwt by multiplier 112, and phase Q is multiplied by multiplier 113. Each output is added in addition circuit Π4, and its addition output is supplied to DA converter 115 'converted to analog signal' via low-pass filtering U6 output to transmission I-^ ---: ----- ^ ------ 1T -------- ^ (Please read the notes on the back before filling-?? This page) '' , -9- A7 ______________B7__ 5. Description of the Invention (7) ~ Circuit. Figure 6 is a block diagram of the modulator of most carriers, and Figure 7 is a diagram showing an example of the configuration of the majority of carriers shown in the sixth circle. FIG. 6 'sends the data to the SP conversion circuit 51 to convert the serial data into parallel data. The symbol configuration is performed by the encoder 52. The orthogonal modulation system uses the sine wave and the cosine wave to configure the data in a two-dimensional manner, and allocates the data bits to each carrier according to the SN ratio. Most carrier systems are As shown in the seventh circle, for example, it is configured at a carrier frequency interval of 4.3125 kHz. 'At least the majority of the bits are allocated to the carrier with a good SN ratio in a two-dimensional manner. Inverse-Bollier transform, the parallel data is converted into a series by the pS conversion circuit 54, and then converted into an analog signal by the DA converter 55, and then output through a low-pass filter 56. Fig. 8 shows a fifth embodiment of the present invention. Block diagram. In Figure 8, the modem 60 and the modem 70 are connected to each other by twisted pair, and the digital modulation signal is transmitted and received between the two sides. The modem 60 includes a transmitting circuit 61 and a receiving circuit 62. The receiver 70 includes a receiving circuit 71 and a transmitting circuit 72, and at the same time, a noise intensity monitoring circuit 73 which is a feature of the present invention, and a speed control signal generating circuit 74 are provided. The noise intensity monitoring circuit 73 receives an output from the receiving circuit 71. , Measure the change of noise intensity with time, analyze the periodicity of noise intensity in time. The noise intensity monitor telephone 73 is supplied with the speed control signal generating circuit 74, which can be synchronized with the cycle of noise intensity change. Speed control signal to control speed. The generated speed control signal is supplied to the sending circuit 72 and the modem 60. The sending circuit 61 and the receiving circuit 62. The paper size is _ National Standard (CNS) A4 (210X297 ^) ) ~--10- I-: ---; ----- meal ------ • 玎 ------ #. {Please wash and read # '面 的 NOTES ^^ Write this page '-· V. Description of the invention (A7 B7 纣 lance-Central Central " • " ^ Only work together to print shirts ^^ Figure 9 is a timing chart for explaining the operation of the communication device shown in Figure 8 (b). The operation will be described next. The noise intensity monitoring circuit 73 monitors the noise level based on the output of the receiving circuit 71, and when it is analyzed that the change of the noise level has a time periodicity, the speed control signal generation circuit 74 makes the output high according to SNit Speed and SN ratio time to switch the speed control signal for transmission speed. This allows a large amount of data to be transmitted between modems 60 and 70 at times when the SN ratio is high. In the Bingbing method ISDN, as shown in Figure 9, the downlink data transmission from the main user of the telephone office, the next moment, the uplink data transmission from the user to the telephone office 1.1 78msec »so 'divide a cycle into at least two or more The method of transmitting by time is called short pulse transmission. There is an interval of 0.072msec between the upper pulse train and the lower pulse train. It is a system that transmits the uplink pulse train and the downlink pulse train alternately at a 2.5msec period. At the same time, from the perspective of the central office, the signals of all ISDN users are sent and received synchronously. The uplink burst signal sent from the ISDN user will become the positive end crosstalk noise mixed into the user receiver other than ISDN, causing the SN ratio to decrease. On the other hand, the downstream burst signal from the central office to the ISDN user will become the far-end crosstalk noise mixed into the subscriber line other than ISDN, but this noise is smaller than the positive end crosstalk noise of the upstream burst. That is, it is better to find the most suitable transmission speed for the SN ratio in the ISDN upstream burst and the SN ratio in the ISDN downstream burst, and switch the transmission in synchronization with the ISDN burst signal switching. There are two methods for switching the transmission speed. The first is the note-binding booklet that you should read before switching the modem. The paper size is applicable to the ten national standards (CNS) A4 specifications (210X297 mm) -11-A7 —---------- ---- B? __ 5. The method of the invention description (9), and the other is the method of switching the coding rate of the error correction code. FIG. 10 is a block diagram showing an embodiment of a process for switching a modem. The transmitting circuit 61 shown in the tenth and eighth stages includes an input buffer 611, a modulator 612, and a control circuit 613, and the receiving circuit 71 includes a demodulator 711, an output buffer 712, and a control circuit 713. The input data is supplied to the input buffer 611 'and the speed control signal generating circuit 74 shown in FIG. 8 is transmitted to the control circuit 613. The control circuit 613 can supply the transmission speed control signal to the input buffer 611 'and the modulation speed control signal to the modulator 612 according to the transmission speed control signal. On the other hand, the control circuit 713 of the receiving circuit 71 receives the transmission speed control signal, supplies the demodulated speed control signal to the demodulator 711, and supplies the received speed control signal to the output buffer 712. The embodiment should transmit a speed control signal, control the receiving loop of the transmission circuit 61 into the buffer 611, and the modulation speed of the modulator 612, and control the demodulation speed of the demodulator 711 of the receiving circuit 71, and The receiving speed of the output buffer 712 can be used to control the data transmission speed in synchronization with the period of the noise intensity change, and the most suitable transmission speed can be set. The eleventh circle is a block diagram showing another example of switching the processing speed of the modem. In FIG. 11, the structure of the transmission circuit 61 is the same as that of the embodiment shown in FIG. The embodiment shown in FIG. 10 accepts an external transmission speed control signal, and outputs a demodulated speed control signal and a received speed control signal. The embodiment shown in FIG. 11 is based on the demodulated output of the demodulator 711, which is read by I to read the notes of 1¾.

A -12- The central part of the crotch rate is only for cooperation. A7 -__________________ B7 V. Description of the invention (10) The step extraction circuit 714 is synchronized with the period of the noise intensity change, and the demodulation speed control signal is output with Receive speed control signals. FIG. 12 is a square field diagram of an embodiment of a coding rate for switching error correction codes. On the twelfth lap, a folding code circuit 614 is provided between the input buffer 611 and the modulator 612 of the transmission circuit 61. The control circuit 615 should transmit a speed control signal 'send the read speed control signal to the input buffer 611, and The coding rate control signal is supplied to a finger circuit 614. On the other hand, the 'receiving circuit 71 inserts a bitwise decoding circuit 714 between the demodulator 711 and the output buffer 712, and the control circuit 715 should transmit a speed control signal' to the decoding mode control signal 714. This embodiment is used. When issuing this Rayleigh 6, the folding code circuit 614 erases the symbols from the folding code by using the completed vehicle control signal ′ to improve the technique of encoding punctured codes. Similarly, the receiving circuit 71 performs a decoding operation corresponding to the coding rate of the received data in the bit-wise decoding circuit 714 by the decoding mode control signal '. Fig. 13 is a block diagram of a sixth embodiment of the present invention. This embodiment is the same as the embodiment shown in FIG. 4 above. A twisted pair is used in the transmission circuit, which is composed of the office modem 30 and the client modem 40. The office modem 30 and the client The modem 40 is a combination of the transmitting circuit and the receiving circuit shown in Fig. N, which is β. That is, the local modem 30 contains the input buffer 611, the modulator 612, and the transmission control circuit 613 as the transmitting circuit. Contains' demodulator 716 as a receiving circuit, output buffer 717, and receiving control circuit 718 'and contains' for connecting the modulator 612 and the demodulator 716 to a twisted pair 5 as a transmission circuit Hybrid circuit 6. I-^ ---: ----- ^ ---- ^ --- ΐτ ------ ^ (诮 Please read the note on the back ^ ►item first to write this page)

The central government department of the Ministry of Economic Affairs and the Ministry of Public Affairs and Industry cooperated with the private printing switch A7 B7. 5. Description of the invention (11) The client modem 40 also contains the input buffer 616, the modulator 617, and the transmission control circuit as the transmission circuit. 618, which also contains a demodulator 711 'output buffer 712' as a receiving circuit, a synchronous extraction circuit 714 and a receiving control circuit 713 ', and' is used to connect the modulator 617 and the demodulator 711 to the twisted pair 5 The operation of each sending / receiving circuit of the hybrid terminal 7 shown in FIG. 13 and the client side modem 30 and the client side modem 40 is the same as that of FIG. 11 in Shangyuan, which can send and receive data in both directions. Furthermore, 'asymmetric type of which both sides have the same transmission speed, or an asymmetric type which has a faster speed may be used.' Figures 14A and 14B are block diagrams showing modulators and demodulators for most carriers to which the present invention is applied. 'Especially' Figure 14A shows the modulator and Figure 14B shows the demodulator. In FIG. 14 ', the input data is turned into a constellation encoder 31. In order to perform orthogonal modulation with most carriers, a symbol is allocated. Orthogonal modulation uses a sin wave and a cos wave to configure the data in a two-dimensional space, and assigns data bits to each carrier according to the SN ratio. At least a carrier having a good SN ratio is based on, for example, a modulation speed control signal output from the control circuit 613 shown in Fig. 10, and a plurality of bits are allocated in a two-dimensional manner. The symbolized data is supplied to IDFT32. After the inverse Fourier transform, the parallel data is converted into a series by the p / s converter 33. The analog signal is converted by the DAC 34, and then the modulation signal is output from the driver 35. On the other hand, the demodulator shown in FIG. 14B supplies the input signal to the receiver 41, converts it to a digital signal by ADC42, and then converts the serial signal to a parallel signal by the S / D converter 43, which is then processed by DFT44. After the Fourier transform, the constellation decoder 45 is used to perform the opposite operation to the constellation encoder 31, and the winter paper size is applied to the Chinese National Standard (cns) A4 specification (210X297 mm) 1_M--; ------- (Please read the note on the back of this page first page). -14- A7 B7 printed by the Consumers ’Co-operative Society, which has been approved by the central government of the Ministry of Education. The constellation decoder 45 controls the reception speed based on the demodulation speed control signal output from the control circuit 713 shown in Fig. 9, for example. This example can also be clearly seen from the configuration example of the majority carriers shown in Fig. 7. In the frequency band of 30 kHz to 1104 kHz, the majority carriers are arranged at a frequency interval of 4.3125 kHz. This type of modem for most carriers can be used instead of the modem shown in Figure 8 or Figure 9. As described above, according to the embodiment of the present invention, it may be provided that the data is sent from the sending organization to the transmission phone, and the data is received by the receiver, and the transmission is stopped when the transmitter has not sent the data to the transmission phone. Data status, and stop sending data when the crosstalk noise level is high, and only send data when the crosstalk noise level is low, so that data can be effectively transmitted. „At the same time, according to other embodiments of the present invention At this time, because the change of the noise intensity with time is observed at the receiving end, and the periodicity of the noise intensity in time is analyzed to control the data transmission speed, a large amount of data can be transmitted at a time when the SN is relatively high. Brief description 1 is a schematic block diagram of the first embodiment of the present invention; FIG. 2 is a schematic block diagram of the second embodiment of the present invention; FIG. 3 is a schematic block diagram of the third embodiment of the present invention; Fig. 4 is a block diagram showing a fourth embodiment of the present invention; Fig. 5 is a diagram showing a specific example of a modulation circuit used in the embodiment of the present invention; and Fig. 6 is a block diagram of a modulator for most carriers; Fig. 7 shows the configuration example of the multi-teaching carrier shown in Fig. 6. This paper standard is in accordance with China National Standard (CNS) A4 specification (2 丨 〇 < 297 mm) I-^ --- ^ ----- ^-(Please read the precautions on the back l " 1 艿 this page),? Τ A7 ~ ------------- B7 __ 5. Description of the invention ( 13) FIG. 8 is a block diagram showing the fifth and fifth embodiments of the present invention; FIG. 9 is a timing diagram for explaining the operation of the communication device shown in FIG. 8; and FIG. 10 is a diagram showing a switching modulation and demodulator Block diagram of an embodiment of processing speed; FIG. Π 圚 is a block diagram showing another embodiment of switching processing speed of a modulation demodulator; FIG. 12 is a block diagram of an embodiment showing a coding rate of switching error correction code. Figure 13 is a schematic block diagram of a sixth embodiment of the present invention; Figures 14A and 14B are block diagrams showing modulators and demodulators to which most carriers of the present invention are applied; and Figure 15 is a diagram showing, In the user code, the state of the far-end crosstalk noise and the near-end crosstalk noise are mixed by the inductive return line into the inductive return line. Figure 16 shows the time multiplexing letter of the ping-pong ISDN. Figure: This paper size is applicable to China National Standard (CNS) A4 (210X297mm) -16- B7 ～~~ ----------------------- V. Description of the invention (I4) Comparison of component numbers 1 »la» lb »61 * 72 ... Sending circuit 2, 2a, 2b, 62, 71 ... Receiving circuit 5. Twisted pair 6, 7 ... Hybrid circuit 11 , 11a, lib ... modulators 12, 12a, 12b .._ send control circuit 13, 23 ... elastic buffer 14, 14a, 14b ... multiplexer 15 .... memory 21, 21a , 21b ... demodulator 24, 24a, 24b ... demultiplexer 30 ... central office data machine 31 ..... constellation encoder 33, 54 ... PS converter 34 .. DA converter 35 .. .Driver 40 .. User's modem 41 .. .Receiver 42 .. .AD converter 43, 51... SP converter 45... Constellation decoder 52, 111... Encoder 55, 115 — DA converter 53... Anti-Bollier transformers 60, 70 ... modem 73 ... noise level monitoring circuit 74 ... speed control signal generating circuit 116 ... low-pass filter 6U ... input buffer 612 ... modulator 613 '713 ... control circuit 614 ... folding code circuit 615 '715 ... control circuit 616 ... input buffer 61 7 ... Modulator 618 ... Transmission control circuit 711 ... Demodulator 712 ... Output buffer 714 ... Synchronous extraction circuit 714 ... Bitwise decoding circuit 716 ... Demodulator 717 ... Input buffer 718 ... Reception control circuit The paper size is in accordance with the Chinese National Standard (CNS) A4 specification (2 丨 0X297 mm) -17-

Claims (1)

A8 B8 C8 ---------__. &Quot; ** 1 .--Scope of patent application ^-A communication device is a transmitter that outputs a digital modulation signal to a transmission circuit, and will receive The signal is demodulated to become a data receiver, and a communication device for high-speed data communication includes: having a data sending status from the transmitter to the transmission circuit, a data receiving status with the receiver receiving data, and A control circuit for the transmitter to send data to the transmission circuit in the state of stopping sending data, and by periodically controlling the signal, to cause it to transition between the state of sending data and stopping sending data. 2. As for the communication device of the first patent application range, the transmitter includes a round buffer, the receiver includes an output buffer, and the control circuit controls the speed of the data transmitted from the transmitter to the receiver to make it It does not change with time and maintains a certain speed. For example, in the case of the communication device of the first patent application scope, when the above transmitter stops sending data, the signal indicating the state is modulated and sent out. The above-mentioned receiver demodulate the modulated signal and recognizes that it is stopped sending and receiving data. 4. As for the communication device of the scope of application for patent, the signal transmission circuit is a twisted pair line. 5. If the communication device of item 1 of the patent application scope is set, the transmitter and the receiver are respectively provided with two groups for data transmission in both directions. -18- This paper size is applicable to the DU standard (CNS) Α4 size (210X297 mm) Printed by A8 B8 C & In the five-item reverse signal device, the above two sets of transmitters and receivers have a faster data transmission speed from one party to the other than the data transmission rate from the other party to the other. J 7 'The communication device according to item 1 of the scope of patent application, wherein the transmitter includes a quadrature amplitude modulation circuit for transmitting and receiving data. 8. The communication device as claimed in claim 1 of the patent application scope, wherein the transmitter includes a modulation circuit that uses orthogonal majority carrier modulation when transmitting data. A communication device is a communication device for transmitting digital modulation signals to a transmission circuit and a receiver for demodulating a received signal into data for high-speed data communication. The receiver includes: Noise observation circuit with changes in signal intensity over time; and a noise analysis circuit for analyzing the periodicity of the noise intensity observed by the above-mentioned noise observation circuit in time; The analysis of the noise intensity change cycle is synchronized to control the transmission speed of the data transmission speed control circuit. 10. The communication device according to item 9 of the scope of patent application, comprising: dividing a period of the above-mentioned noise intensity change into at least two times', the signal-to-noise ratio of the above-mentioned receiver side observed according to each divided time, A switching circuit for switching the processing speed of the modulation and demodulation circuit included in the above-mentioned transmitter and receiver at each time. This paper • Common Chinese National Standard (CNS) A4 size (210X297 mm) -19- J ^ Binding line ·, · (Please read the note on the back before filling this page) Apply for a patent Fangu A8 B8 C8 · D8 U · If the communication device in the 9th scope of the patent application contains communication settings, you can change the above-mentioned noise intensity by one cycle. ::::: each time the road is divided— One: 12. If the communication device according to item 9 of the scope of patent application, the above-mentioned signal transmission circuit is a twisted pair. 13. If the communication installation of item 9 of the scope of patent application is applied, the above-mentioned transmitter uses a plurality of carriers β 14 in order to send data. A type of communication device is a transmitter that outputs a digital modulation signal to a transmission circuit and will receive the data. The signal is demodulated to become a data receiver. A communication device for high-speed data communication includes: a circuit that controls the data transmission speed by an external control signal that is synchronized with the cycle of the noise intensity change. Page Order Printed by the Central Laboratories of the Ministry of Economic Affairs and Consumer Cooperatives * Line 1 ·-; -20- This paper is applicable to the National Slope (CNS) Α4 specification (210X297)