Open Mobile Communication Innovative Experiment System closely follow the courses of "Mobile Communication" and "Spread Spectrum" etc, and integrates three types of multiple access communication methods: CDMA, TDMA and FDMA. By using open and transparent design, it demonstrates the principle and the composition of mobile communication system, and also its business process that can fully meet the needs of teaching and curriculum design and development of Experiment needs colleges and universities, vocational colleges communication related major mobile communication.
(1)It uses the design of mainboard together with modules, and experiments are close to the mobile communication theory course content, which covers the main knowledge points of mobile communication system principle. There are total 45 experiments including unit experiment, system experiment and development experiment to ensure adequate distribution of Experiment hours.(2) Functional circuit is divided into pieces according to the circuit flow, accompanied by explanatory text, block diagram to help the experimenter to grasp the design and implementation process. The shipping CD provides the necessary circuit design schematic and reference material. (3) All open design, programming download interface, free pin interface, as well as related software to facilitate the secondary development. Platform can be used for large-scale design project, it's aimed at full exercise of student's self-development and practical ability start from simple function to develop large-scale design project step by step according to the easy-to-difficult teaching pattern. And it also recommends additional topics to stimulate student interests. (4) The system covers 2G, 2.5G and 3G mobile communication knowledge points, closely reflect the direction of mobile communication development, to guide the more in-depth study for the experimenter. (5) It provides the software, test routines, courseware, reference manuals and other means to assist the Experiment teaching.
Product Specification / Models
(1) AC/DC power Input: AC 220V u00b1 10% Output: DC +5 V/3A, +12 V/1A, -12V/0.5A (2) Mainboard signal source Digital signal source: digital code type and code rate are set by the DIP switch Sine signal source: frequency 2 KHz, amplitude adjustablePseudo code signal source: 31 bits, 511 bits long pseudo-random sequence, code rate is set by the DIP switch Open the programming download interface, open 10 free I / O ports(3) Mainboard modulation and demodulationMSK, GMSK, QPSK, OQPSK, pi/4-DQPSK, 16QAM modem type is optional Baseband rate: 12 kbps Carrier frequency: 10.7 MHz Open the programming download interface, open 28 free I / O ports(4) CDMA receiver module Spread spectrum sequence: Gold code, match up the DIP switch settings Spread spectrum code rate: 768 kbps Spread spectrum gain: 64 Spread spectrum Method: DSSS (5) AMBE module Voice signal source: microphone input, headphone output Code: AMBE advanced multi-band excitation coding algorithm, speech encoding and decoding rate between 2400-9600 bps, which is optional Open the programming download interface, open 32 I / O ports(6) FPGA Module Advanced EP2C8T144C8 chip as the core FPGA, to achieve cyclic encoding and decoding, convolutional code encoding and decoding, Hamming code encoding and decoding, Turbo encoding and decoding, scrambling code and descrambling code, deinterleaver and interleaver, frequency meter, TDMA and other functions. Coding rate: 12 kbps Open the programming download interface, open 32 free I / O ports
Application / Models
(1) Signal source experiment (mainboard function module) (2) QPSK modulation and demodulation experiment(3) OQPSK modulation and demodulation experiment(4) pi/4-DQPSK modulation and demodulation experiment(5) 16QAM modulation and demodulation experiment(6) MSK modulation and demodulation experiment(7) GMSK modulation and demodulation experiment(8) MSK / GMSK non-coherent demodulation experiment(9) PSK signal carrier recovery experiment (10)Bit synchronous signal extraction experiment (11) Frame synchronization signal extraction experiment (12) AMBE voice compression coding and decoding experiment(13) Hamming code coding and decoding experiment(14) Walsh sequence generation and characteristic analysis experiment(15) m sequence generation and characteristic analysis experiment(16) Gold sequence generation and characteristic analysis experiment(17) Spreading sequence acquisition and tracking experiment(18) Spreading and despreading experiment(19) CDMA mobile communication system experiment(20) White noise channel characteristic analysis experiment(21) Slow fading channel characteristic analysis experiment(22) Multi-path fading channel characteristic analysis experiment(23) Channel distribution experiment(24) Transmitter experiment(25) Receiver experiment(26) FDMA mobile communication system experiment
Instrument specification:1.t60M Digital storage oscilloscope2.tPC(Be used for curriculum design and secondary development)Note: devices above can be self-purchased or us.
Our company was established in year 1993..
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