Key components: sub-carriers, perpendicularity and parallel transmission
Posted: Sat Feb 22, 2025 9:41 am
Now that we understand the basic concepts of OFDM, let’s take a look at its key components:
A subcarrier is a low-speed data stream that is modulated at different frequencies.
Orthogonality ensures that there is no interference between sub-carriers, allowing for maximum efficient use of the spectrum.
Parallel transmission allows simultaneous panama mobile database of data over multiple subcarriers, increasing the total system data throughput and resistance to frequency-selective fading.
These components together form the heart of what makes this modulation technique work so effectively in digital communications.
Past development and evolution of OFDM technology
OFDM technology has roots dating back to the mid-1960s and has undergone significant development and improvement since Robert W. Chang first came up with the idea at Bell Labs. OFDM’s development can be summarized into the following key stages:
year Developer performance
1966 Robert W. Chang Introducing the concept of OFDM
1971 Weinstein and Ebert Increase the protection period
1980s Cimini Application of OFDM in mobile communication
1990s Many people Set standards for digital audio and video broadcasting.
Advantages of OFDM in Digital Communication
OFDM has many advantages in digital communications, especially the efficient use of available bandwidth and the increase in spectral efficiency.
This technique is resistant to selective fading and multipath propagation, enabling reliable data transmission even in challenging channel conditions.
In addition, OFDM's simpler channel equalization process and reduced system complexity also make digital communication applications more efficient and simple.
A subcarrier is a low-speed data stream that is modulated at different frequencies.
Orthogonality ensures that there is no interference between sub-carriers, allowing for maximum efficient use of the spectrum.
Parallel transmission allows simultaneous panama mobile database of data over multiple subcarriers, increasing the total system data throughput and resistance to frequency-selective fading.
These components together form the heart of what makes this modulation technique work so effectively in digital communications.
Past development and evolution of OFDM technology
OFDM technology has roots dating back to the mid-1960s and has undergone significant development and improvement since Robert W. Chang first came up with the idea at Bell Labs. OFDM’s development can be summarized into the following key stages:
year Developer performance
1966 Robert W. Chang Introducing the concept of OFDM
1971 Weinstein and Ebert Increase the protection period
1980s Cimini Application of OFDM in mobile communication
1990s Many people Set standards for digital audio and video broadcasting.
Advantages of OFDM in Digital Communication
OFDM has many advantages in digital communications, especially the efficient use of available bandwidth and the increase in spectral efficiency.
This technique is resistant to selective fading and multipath propagation, enabling reliable data transmission even in challenging channel conditions.
In addition, OFDM's simpler channel equalization process and reduced system complexity also make digital communication applications more efficient and simple.