CDMA Transceiver Trainer

Experiments Included:

  • Study of Direct Sequence Spread Spectrum Modulation and De-modulation Process

  • Study of BPSK Modulation and De-modulation Process

  • Study CVSD Encoding and Decoding

  • Study of DSSS using an Analog signal as an input

  • Study of DSSS using an Microphone as an input

  • Study of Direct Sequence Spread Spectrum Modulation and De-modulation Process with CDMA software

IT-4209 provides students to explore the basic technique of CDMA communication. The trainer shows the coding scheme used in CDMA communication and modulation / demodulation concept. The trainer also provides the digital coding / decoding of voice signal using CVSD technique and PC-PC communication using software.

Features:

  • Power Supply Included

  • Required Circuits Tested

  • Each Section Clearly Marked for Input and Output

  • Each Section Works as an Independent Unit

  • Built-in Audio Generator

  • Built-In Clock Generators

  • Built-In Data Generator

  • CVSD Codec

  • Each Section Clearly Marked for Easy Understanding

Technical Features:

  • 8-Bit Data Generator: For generation of Binary Data

  • Word length: 8 bit

  • Clock frequency: 2K, 4K, 8K, 16K, 32K, 64K

  • Data format: NRZ

  • PN Sequence generator

  • PN Sequence Bit length: 15 bits

  • Direct Sequence Spread Spectrum (DSSS) Coder and Decoder

  • Analog signal generator: adjustable frequency and amplitude

  • Carrier generator: 455KHz

  • Modulator: Binary Phase Shift Keying Modulator

  • Demodulator: Binary Phase Shift Keying Demodulator

  • Codec: CVSD Encoder / Decoder for Audio

  • Low Pass Filter: 5th Order Butterworth Filter with 3.4KHz cut off

  • Amplifier: AC amplifier with variable gain

  • PC-PC Communication using software

  • Microphone interface for voice