Explore MATLAB source code curated for "扩频" with clean implementations, documentation, and examples.
BOC modulation involves multiplying the spread spectrum signal with a square wave after spreading the original signal, resulting in spectral splitting and significantly enhanced anti-interference capabilities. This technique is widely used in satellite navigation systems like GPS and Galileo for improved signal robustness.
This MATLAB-based program generates OVSF (Orthogonal Variable Spreading Factor) codes used for WCDMA spreading, featuring straightforward implementation and practical utility. The implementation utilizes MATLAB's matrix operations and recursive algorithms to efficiently create orthogonal code sequences with variable spreading factors.
This document provides comprehensive simulation of the complete communication chain, covering modulation, spreading, transmission, reception, despreading, and demodulation processes. The implementation includes generation of random time-varying multipath channels that realistically model signal propagation effects.
Basic Principle Schematic Diagram
Detailed simulation of frequency hopping communication system including comprehensive spread spectrum and despreading processes with code implementation insights
Application Background This program is designed to generate GPS simulation signals, incorporating complete implementations for C/A code generation, navigation data creation, and spread spectrum modulation. It serves as an excellent educational resource for undergraduate and graduate students learning GPS fundamentals, as well as professionals requiring GPS signal simulation capabilities. Key Technologies 1. Generation of C/A code baseband/IF signals, producing a fully modulated signal on the L1 carrier frequency 1) PRN code selection - Specifically generates C/A codes for satellite PRN number "5" 2) Navigation data insertion - Implements 50bps data rate encoding with spread spectrum modulation using C/A codes
Implementation of a spread spectrum system featuring random binary sequence generation, spreading with digital codes, pulse shaping, BPSK modulation transmission, and corresponding despreading/demodulation at the receiver end
MATLAB Simulation of CDMA Communication Systems - Abstract: This article provides a foundational introduction to the MATLAB programming language, followed by a detailed description of CDMA communication system simulation using MATLAB. Key implementation aspects include signal generation, spreading codes application, and correlation detection algorithms. Keywords: Simulation; Code Division Multiple Access; Spread Spectrum
Graduation Project Implementation in Communication Engineering