Rajagopal, Harish Nawani, Varun Design of optimized engine for Direct Sequence Spread Spectrum Transceiver Rajagopal, Harish Nawani, Varun

Outline Motivation System functional diagram Implementation Details Optimizations Results Future work

Motivation Direct Sequence Spread Spectrum is one of the most widely used algorithm in communication applications. The implementation of the DSS algorithm lends itself to optimization at different levels. Speeding up the algorithm gives us more opportunity to increase the efficiency in tracking part of the algorithm to reduce multi-path fading effect in CDMA systems It also gives us faster acquisition time for initial synchronization of the data.

Basic Direct Sequence Spread Spectrum Architecture Transmitter Receiver

PN Sequence Synchronization at the Receiver Acquisition Tracking

Digital Matched filter Un-Optimized Structure Optimized Structure

Loop Filter Un-optimized Structure Optimized Structure

Results Matlab Simulation Verilog Simulation

Results Un-optimized simulation Optimized simulation

Future Work Implementation of Dynamic Digital Matched filter to reduce hardware requirements Implementation of a faster squaring algorithm using folding ROM approach

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