WO2012006857A1 - Puce de conversation intégrée et système de conversion intégré muni de celle-ci - Google Patents

Puce de conversation intégrée et système de conversion intégré muni de celle-ci Download PDF

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Publication number
WO2012006857A1
WO2012006857A1 PCT/CN2010/080308 CN2010080308W WO2012006857A1 WO 2012006857 A1 WO2012006857 A1 WO 2012006857A1 CN 2010080308 W CN2010080308 W CN 2010080308W WO 2012006857 A1 WO2012006857 A1 WO 2012006857A1
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Prior art keywords
signal
intercom
digital
integrated
processing
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PCT/CN2010/080308
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English (en)
Chinese (zh)
Inventor
蔡东志
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深圳市力同亚太科技有限公司
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Publication of WO2012006857A1 publication Critical patent/WO2012006857A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025—Door telephones
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/30—Circuit design
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems

Definitions

  • the present invention relates to the field of wireless communications, and in particular to an integrated intercom chip and an integrated intercom system including the same.
  • the existing walkie-talkies are divided into two categories: professional machines and civilian machines (public walkie-talkies).
  • Professional machine refers to a machine with a transmission power greater than 4W, which mainly satisfies the application of long distance to the call, such as: public security, security and professional mountaineers;
  • civil machine refers to a machine with a transmission power of not more than 0.5W, which mainly satisfies the call distance.
  • the present invention provides an integrated intercom chip and an integrated intercom system including the same, which is small in size, low in cost, and high in reliability.
  • the integrated intercom chip of the present invention adopts the following technical solutions:
  • An integrated intercom chip comprising a central processing part, an intercom processing part and a digital interface control part, the intercom processing part is configured to implement intercom signal transceiving processing, and the central processing part is connected to the digital interface control part
  • the digital interface control portion is connected to the intercom processing portion, and the central processing portion controls an operation state and a parameter of the intercom processing portion through the digital interface control portion; the central processing portion and the intercom processing
  • the partial and digital interface control section uses digital signal technology and is integrated on a single chip through a CMOS process.
  • the central processing portion and the intercom processing portion share a crystal.
  • the intercom processing portion includes a radio frequency receiving portion, a radio frequency transmitting portion, and a baseband signal processing portion;
  • the radio frequency receiving portion is configured to receive a radio frequency signal and demodulate the output speech signal And a signaling signal to the baseband signal processing portion;
  • the baseband signal processing portion is configured to perform baseband processing on the demodulated output voice signal and the signaling signal, and is also used for baseband transmitting the voice signal and the signaling signal
  • the processing is input to the radio frequency transmitting part;
  • the radio frequency transmitting part is a transmitting circuit of a direct phase-locked loop frequency integrated form, and the circuit comprises: a frequency modulation depth adjuster, a fractional phase-locked loop frequency synthesizer and a power amplifier, and the frequency modulation
  • the depth adjuster is configured to perform FM depth adjustment on the input voice signal and the signaling signal;
  • the fractional phase-locked loop frequency synthesizer is configured to perform digital direct modulation modulation on the signal outputted by the FM depth adjuster to generate
  • the radio frequency receiving portion is a receiving circuit in the form of a low intermediate frequency.
  • the receiving circuit of the low intermediate frequency form comprises: a low noise amplifier, a quadrature mixer, two intermediate frequency signal processing units, and a digital FM demodulator;
  • the low noise amplifier is configured to perform low noise amplification on the received RF signal and And outputting to the quadrature mixer in two ways;
  • the quadrature mixer is used for mixing and transforming two orthogonal intermediate frequency signals and outputting to two intermediate frequency signal processing units respectively;
  • the input intermediate frequency signal is processed to output an intermediate frequency digital signal;
  • the digital frequency modulation demodulator is configured to demodulate the input two intermediate frequency digital signals, and respectively output the voice signal and the signaling signal.
  • the baseband signal processing part includes a receiving voice processing unit, a transmitting voice processing unit, and a signaling signal processing unit; the signaling signal processing unit is configured to perform filtering and shaping processing on the received or transmitted signaling signal; and the receiving voice processing The unit is configured to perform digital-to-analog conversion and filtering and amplification processing on the voice signal outputted by the radio frequency receiving portion, and the output voice processing unit is configured to sequentially filter, digital-analog, convert, and output the transmitted voice signal input by the outside world. Go to the RF transmitter section.
  • the central processing portion is a DSP core.
  • the present invention also provides an integrated intercom system including the above integrated intercom chip.
  • the integrated intercom system further includes a GPS module, and the GPS module is connected to the integrated intercom chip.
  • the integrated intercom chip of the invention adopts the digital signal processing technology and integrates the circuit of the intercom transceiver, the central control and the like into one chip through the CMOS process, and the intercom function can be completed with only a few peripheral devices, and the integration is high.
  • the whole machine has low cost; it not only solves the problem that the traditional analog intercom system has complicated circuit structure, many discrete components and high production cost, but also greatly improves the technical parameters and stability of the product.
  • FIG. 1 is a block diagram showing the circuit structure of an integrated intercom chip according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an integrated intercom system according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another integrated intercom system according to an embodiment of the present invention.
  • an integrated intercom chip includes a central processing unit (MCU), an intercom processing part, and a digital interface control part, where the intercom processing part is configured to implement intercom signal transceiving processing.
  • the central processing portion is connected to the digital interface control portion, the digital interface control portion is connected to the intercom processing portion, and the central processing portion controls the operation of the intercom processing portion through the digital interface control portion Status and parameters; the central processing portion, the intercom processing portion, and the digital interface control portion employ digital signal technology and are integrated on one chip by a CMOS process.
  • the intercom processing part and the central processing part can share one crystal oscillator, thereby avoiding intermodulation interference of multiple signal sources.
  • the intercom processing section includes a radio frequency receiving section 1, a radio frequency transmitting section 2, and a baseband signal processing section 3.
  • the radio frequency receiving section 1 includes a low noise amplifier 11, a mixer 12, a low pass filter 13, a programmable amplifier 14, a first analog to digital converter 15, a digital processing unit 16, and a digital FM demodulator 17.
  • the radio frequency transmitting section 2 includes an FM depth adjuster 21, a phase locked loop frequency synthesizer 22, and a power amplifier 23.
  • the baseband signal processing section 3 includes a filter shaper 331, a first speech filter 311, a digital to analog converter 312, a speech amplifier 313, a second analog to digital converter 321, a second digital filter 322, and a second speech filter 323. .
  • the radio receiving part 1 adopts a receiving circuit form of a low intermediate frequency structure.
  • the input RF signal first reaches the low noise amplifier 11.
  • the low noise amplifier 11 is a differential low noise amplifier. After low noise differential amplification, it is divided into two channels and fed to the quadrature mixer 12, which can directly convert the RF signal to a low intermediate frequency.
  • the mixer typically performs high sideband mixing, and the local oscillator signal is higher (or lower) than the RF frequency, which makes the frequency higher (or The image frequency below twice the RF frequency is also converted to the intermediate frequency, which brings image frequency interference.
  • the low intermediate frequency structure adopted in this embodiment can not only achieve high integration, but also effectively reduce off-chip discrete components, avoiding the use of an external RF image suppression filter, and reducing the overall cost.
  • the quadrature mixer 12 outputs two orthogonal intermediate frequency signals, that is, an I signal and a Q signal, which are respectively sent to two intermediate frequency signal processing units.
  • the intermediate frequency signal processing unit includes a low pass filter 13, a programmable amplifier 14, a first analog to digital converter 15, and a digital signal processing unit 16.
  • the I signal and the Q signal first enter the low pass filter 13 on the respective path, and the low pass filter 13 is a third-order Chebyshev filter.
  • the main function is to increase the adjacent channel selectivity of the system and improve the system resistance. Blocking performance.
  • the filtered IF signal is amplified by a programmable amplifier 14 whose gain is defined by its internal register or digital AGC (Automatic Gain Control, automatic gain control) circuit settings. Thereafter, the intermediate frequency signal is input to the first analog to digital converter 15 to be converted into an intermediate frequency digital signal.
  • AGC Automatic Gain Control, automatic gain control
  • the intermediate frequency digital signal is then input to digital processing unit 16 for digital processing, wherein digital processing unit 16 includes a first digital filter 161, a sampler 162, a finite impulse response filter 163, and a numerically controlled oscillator 164 for The sampler 162 is provided with a numerically controlled local oscillator signal at the time of sampling, and the first digital filter 161, the sampler 162, and the finite impulse response (FIR) filter 163 sequentially filter and sample the digital signal, and then filter by the finite impulse response.
  • the 163 filters out all out-of-band interference.
  • the digitally processed two orthogonal IF digital signals finally arrive at the digital FM demodulator 17 to demodulate the signaling signal and the speech signal, respectively.
  • the radio frequency transmission path the externally transmitted transmitted speech signal and the signaling signal are processed by the baseband signal processing section 3, and then first reach the FM depth adjuster 21 in the radio frequency transmitting section 2 to perform the FM depth adjustment, and then sent to the phase locked loop frequency synthesis.
  • the device 22 performs digital direct modulation modulation to generate a stable modulated RF carrier signal, and the modulated RF carrier signal is amplified and transmitted by the power amplifier 23.
  • the entire RF transmitting portion 2 is a transmitting circuit of a direct phase-locked loop frequency integrated form.
  • the baseband signal processing section 3 is mainly divided into three units: a receiving speech processing unit, a transmitting speech processing unit, and a signaling signal processing unit.
  • the signaling signal processing unit is a filter shaper 331 for filtering and shaping the signaling signal received (received from the digital FM demodulator 17) or transmitted (input by the outside, sent to the FM depth adjuster 21).
  • the received speech processing unit includes a first speech filter 311, a digital to analog converter 312, and a speech amplifier 313.
  • the speech signal output from the digital FM demodulator 17 is sequentially filtered, digital-analog converted, and amplified by the first speech filter 311, the digital-to-analog converter 312, and the speech amplifier 313.
  • the transmit speech processing unit includes a second analog to digital converter 321, a second digital filter 322, and a second speech filter 323.
  • the transmitted speech signal input from the outside is first converted into a digital signal by the second analog-to-digital converter 321, and then filtered out by the second digital filter 322, finally filtered by the second speech filter 323, and output to the radio-frequency transmitting portion. 2.
  • the second analog-to-digital converter 321 uses a high-performance Delta-Sigma analog-to-digital converter with a sampling frequency that is consistent with the clock frequency of the entire integrated intercom chip. This choice allows the front end to eliminate the need for an anti-aliasing filter.
  • a voltage controlled oscillator (not shown) in the phase locked loop frequency synthesizer 22 operates at 1.4 GHz to 2 GHz to avoid the drag effect of the power amplifier 23. The voltage controlled oscillator is divided to output the frequency range required by the intercom module.
  • the phase-locked loop frequency synthesizer 22 also supplies the local oscillator signal to the mixer 12 to avoid that the mixer needs to additionally use other devices to obtain the local oscillator signal.
  • the phase-locked loop frequency synthesizer 22 uses a high-performance fractional-phase-locked loop frequency synthesizer to achieve low-phase noise, extremely fast phase-locking time, and high-performance, low-cost design with adjustable frequency points.
  • the digital interface control part 4 the radio frequency receiving part 1, the radio frequency transmitting part 2 and the baseband signal processing part 3 can be controlled by the MCU through the digital interface control part 4, and the working states and parameters of the above three parts are adjusted, including the receiving gain, Various parameters such as frequency modulation gain, frequency, RF transceiver control, and loop characteristics of the phase-locked loop frequency synthesizer are transmitted.
  • the digital interface control section 4 employs, for example, an I2C bus as a bidirectional control bus to implement interaction and control with the MCU.
  • the three-wire or four-wire SPI bus can be used as a control bus to realize interaction and control with the MCU.
  • the MCU in accordance with the I2C format, the MCU generates a corresponding control word, addresses the digital interface control portion, determines the read/write mode, and then reads or writes the data.
  • the MCU can be the processor of the DSP core, and the same can be other types of control devices.
  • the integrated power management of the intercom chip provides a stable DC power supply for each functional device in the chip through the built-in low-dropout linear regulator circuit and control circuit.
  • FIG. 2 shows an integrated intercom system including the above integrated intercom chip.
  • the MCU 5 mainly completes the intercom processing part through the connection with the digital interface control part 4 of the integrated intercom chip. (including the interaction of the radio frequency receiving section 1, the radio frequency transmitting section 2, and the baseband signal processing section 3).
  • the radio frequency signal is sequentially input to the integrated intercom chip through the antenna switch and the filter, and the intercom processing part performs the foregoing processing on the radio frequency signal, outputs the speech signal to the speaker (horn), and outputs the signaling signal to the MCU 5, and the MCU 5 according to the
  • the signaling signal controls the output state of the voice signal: the signaling signal is compared with the preset value in the MCU 5.
  • the central processing section 5 controls to turn on the speaker to release the voice signal. If different, the speaker is turned off, and the speaker is not released. voice signal.
  • the transmitted voice is converted into an audio electric signal by the receiver (microphone), and the intermodulation processing part processes and outputs the digital FM modulated signal, and then generates a rated RF power through the power amplifier, and then transmits the antenna through the antenna switch, and the MCU5 simultaneously generates the signaling signal.
  • the incoming intercom processing part is processed by the intercom processing part and transmitted together with the speech signal.
  • the integrated intercom system includes a keyboard input unit for, for example, a control command input and a display unit to perform, for example, a display output to facilitate use of the integrated intercom system.
  • the integrated intercom system of the embodiment of the present invention may further include a GPS module, and the GPS module is connected to the integrated intercom chip.
  • the GPS positioning information obtained by the GPS module can be transmitted by integrating the intercom chip, thereby providing the location information of the intercom system holder to the assistance personnel in, for example, a rescue operation.
  • the integrated intercom chip and the integrated intercom system of the invention solve the problems of complicated circuit structure differentiation, multiple discrete components and poor stability of the traditional analog signal processing technology. It greatly simplifies product design and reduces costs, and improves the technical content and intelligent design of the product.
  • the integrated intercom chip can be embedded in a mobile phone or the like, and a mobile phone or other product having an intercom function can also be realized.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
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  • General Engineering & Computer Science (AREA)
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Abstract

L'invention concerne une puce de conversation intégrée et un système de conversation intégré muni de celle-ci, la puce intégrée comportant une CPU, une partie de traitement de conversation et une partie de commande d'interface numérique (4). La partie de traitement de conversation est conçue pour recevoir et transmettre un signal de conversation; la CPU est reliée à la partie de commande d'interface numérique (4); et la partie de commande d'interface numérique (4) est reliée à la partie de traitement de conversation. La CPU commande l'état et les paramètres de fonctionnement de la partie de traitement de conversation par l'intermédiaire de la partie de commande d'interface numérique (4). La CPU, la partie de traitement de conversation et la partie de commande d'interface numérique (4) sont intégrées dans une puce au moyen de la technologie des signaux numériques et de la technologie CMOS. L'invention permet d'obtenir à moindre coût un produit complet présentant un haut niveau d'intégration, en remédiant ainsi aux problèmes associés à un interphone analogique classique, à savoir la structure complexe des circuits, le grand nombre de pièces détachées et le coût élevé, et en améliorant sensiblement les caractéristiques techniques et la stabilité du produit.
PCT/CN2010/080308 2010-07-13 2010-12-27 Puce de conversation intégrée et système de conversion intégré muni de celle-ci WO2012006857A1 (fr)

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CN108322234A (zh) * 2017-01-12 2018-07-24 上海卓旭电子科技有限公司 中国铁路gsm-r双模手持终端系统
CN109495420A (zh) * 2019-01-03 2019-03-19 泉州市铁通电子设备有限公司 一种具有csbk传输功能的数字信道机
CN110492900A (zh) * 2019-07-02 2019-11-22 广州乐摇摇信息科技有限公司 集成芯片及通讯模块及娃娃机及兑币机
CN110504985A (zh) * 2019-09-24 2019-11-26 天津七一二通信广播股份有限公司 一种带数字化音频接口的无线列调信道机设备及实现方法
CN113364477A (zh) * 2021-06-30 2021-09-07 广州市埃特斯通讯设备有限公司 一种obu定位装置
CN115061358A (zh) * 2022-06-20 2022-09-16 北京国卫星通科技有限公司 抗欺骗抗干扰报警北斗授时装置

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CN101888571A (zh) * 2010-07-13 2010-11-17 深圳市力同亚太科技有限公司 一种集成对讲芯片及包括该芯片的集成对讲系统
CN102595255A (zh) * 2011-12-20 2012-07-18 天津七一二通信广播有限公司 短波信道数字对讲机
CN106899321B (zh) * 2017-01-04 2019-12-06 力同科技股份有限公司 一种数字对讲终端及其阻抗匹配方法
CN106911347A (zh) * 2017-01-12 2017-06-30 力同科技股份有限公司 一种集成对讲芯片及射频载波频率产生方法
CN106911341B (zh) * 2017-03-30 2022-07-19 高新兴智联科技有限公司 一种用于etc的超外差接收机
CN116643513A (zh) * 2023-03-16 2023-08-25 深圳瑞德创新科技有限公司 数据处理方法、装置、设备及计算机可读存储介质

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CN108322234A (zh) * 2017-01-12 2018-07-24 上海卓旭电子科技有限公司 中国铁路gsm-r双模手持终端系统
CN108322234B (zh) * 2017-01-12 2024-01-30 上海卓旭电子科技有限公司 中国铁路gsm-r双模手持终端系统
CN109495420A (zh) * 2019-01-03 2019-03-19 泉州市铁通电子设备有限公司 一种具有csbk传输功能的数字信道机
CN109495420B (zh) * 2019-01-03 2024-03-08 泉州市铁通电子设备有限公司 一种具有csbk传输功能的数字信道机
CN110492900A (zh) * 2019-07-02 2019-11-22 广州乐摇摇信息科技有限公司 集成芯片及通讯模块及娃娃机及兑币机
CN110504985A (zh) * 2019-09-24 2019-11-26 天津七一二通信广播股份有限公司 一种带数字化音频接口的无线列调信道机设备及实现方法
CN113364477A (zh) * 2021-06-30 2021-09-07 广州市埃特斯通讯设备有限公司 一种obu定位装置
CN115061358A (zh) * 2022-06-20 2022-09-16 北京国卫星通科技有限公司 抗欺骗抗干扰报警北斗授时装置
CN115061358B (zh) * 2022-06-20 2023-01-31 北京国卫星通科技有限公司 抗欺骗抗干扰报警北斗授时装置

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