Bit Synchronization Process Simulation for Baseband Digital Communications

MATLAB 717B 255 views 0 downloads 1 credits
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Resource Overview

Simulation of bit timing recovery in baseband digital communications using Gardner algorithm without interpolation, employing SRRC for pulse shaping, implementing simplified alfa/1-alfa low-pass filtering instead of PI loop filter, and utilizing straightforward NCO adjustment methods.

Detailed Documentation

This document presents a simulation of the bit synchronization process in baseband digital communications, implementing the Gardner algorithm for timing recovery without employing interpolation techniques. The simulation utilizes Square Root Raised Cosine (SRRC) filters for symbol pulse shaping, while the loop filter adopts a simplified approach using alfa and 1-alfa low-pass filtering rather than conventional Proportional-Integral (PI) control loops. The Numerical Controlled Oscillator (NCO) adjustment mechanism is also implemented with relatively simple computational methods. The Gardner algorithm operates by processing two samples per symbol to detect timing errors, requiring proper configuration of the alpha parameter in the low-pass filter to achieve optimal convergence characteristics. The SRRC pulse shaping ensures minimal intersymbol interference while maintaining bandwidth efficiency.

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