CDMA - DSSS Trainer

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CDMA - DSSS Trainer

Order Code: 40544

SPECIFICATION

Trainer provides a basic understanding of the concepts behind CDMA, and various issues that need to be considered in the design of a DSSS system.These include generation of various pseudorandom (PN) codes like Gold, MLS & Barker with programmable tappings, variable chip rate, and digital modulations BPSK, QPSK & digital AWGN noise with programmable FIR low pass filter. Bit error rate (BER) measurement with known data sequence, overall data rate dependency parameters, spreading & dispreading with DSSS, SNR control, offset control & so on can be performed on model.

Technical Specifications

Direct Sequence Spread-Spectrum (DSSS) Modulator, Demodulator
Programmable chip rates upto 10 M chi p / s
Spreading codes :
Gold sequences (up to 2 -1 chips) Maximal length sequences (max 23 length 2 -1 chips) Barker codes (length 11,13)
Code modulation: BPSK / QPSK / OQPSK with output spectral shaping filter : Raised cosine square root filler with 20 %, 25 %, or 40 % rolloff
Internal generation of pseudo-random bit stream and unmodulated carrier for test purposes
Built-in channel impairments generation : 1. Additive White Gaussian Noise 2. Frequency offset (Doppler)
Sequential code search 4-bit soft-quantized demodulated bits
Extensive monitoring : Receiver lock, Carrier frequency error
Power Supply : 220 V ±10%, 50 Hz / 60 Hz on request
Power Supply : 2 VA(approx.)
Dimensions (mm.) : W 340 × D 241 × H 105