Explore MATLAB source code curated for "子载波" with clean implementations, documentation, and examples.
The water-filling algorithm serves as the fundamental algorithm for subcarrier and channel allocation in OFDM, with many enhanced algorithms built upon its principles to optimize performance.
OFDM system simulation featuring 1024 subcarriers with comprehensive implementation including convolutional coding, interleaving, QPSK modulation, up/down sampling filters, and channel estimation techniques
This repository contains two programs that both implement 4QAM modulation. The first program demonstrates a well-structured approach to 4QAM implementation with clear signal mapping, while the second version introduces OFDM techniques with null subcarriers for improved bit error rate performance. Both implementations include MATLAB code examples for digital modulation and demodulation processes.
OFDM (Orthogonal Frequency Division Multiplexing) is a digital multi-carrier modulation scheme based on Frequency Division Multiplexing (FDM). It utilizes numerous closely-spaced orthogonal subcarrier signals to transmit data through multiple parallel data streams or channels. Each subcarrier employs conventional modulation schemes like Phase Shift Keying (PSK) or Quadrature Amplitude Modulation (QAM) at low symbol rates, while maintaining an overall data rate comparable to traditional single-carrier modulation schemes within the same bandwidth. This article provides MATLAB implementation examples for BER simulation using BPSK-OFDM modulation over AWGN and Rayleigh channels, including the relationship between Eb/No and Es/No ratios.
MIMO-OFDM Channel Estimation Comparison:%------------------------------------------ % EE359 final project, Fall 2002 % Channel estimation for a MIMO-OFDM system % By Shahriyar Matloub %------------------------------------------ clear all; %close all; i=sqrt(-1);
This program simulates a non-orthogonal environment where two users share the same subcarrier. By assigning different power levels, the receiver employs Successive Interference Cancellation (SIC) for signal decoding, demonstrating key NOMA implementation principles.
A comprehensive OFDM simulation program featuring Rayleigh multipath channel modeling with 4 subcarriers implementation, including key functions for modulation/demodulation and channel equalization.
Simulation of a resource allocation algorithm designed for OFDM subcarrier allocation, featuring optimization-based dynamic resource assignment with adaptive channel-aware capabilities.
This program visualizes consecutive OFDM subcarriers in the time domain and analyzes their sensitivity to Carrier Frequency Offset (CFO). The implementation includes phase adjustment capabilities for studying system performance impacts through varying CFO values and phase configurations.
Implementing greedy algorithm-based subcarrier and power allocation in OFDM systems to minimize transmit power while maintaining a specified bit error rate, with code-level optimization strategies