OFDM vs. OFDMA: The Difference

March 1, 2022

One of the terms mentioned frequently while talking about cable modems/gateways with WiFi functions are OFDM and OFDMA. Those are mechanisms used for both DOCSIS and WiFi signal transmission. In this article, we are going to talk about what they mean and the difference. 

What is OFDM?

OFDM stands for Orthogonal Frequency Division Multiplexing. It is a form of multi-carrier modulation, in which multiple subcarrier signals with overlapping spectra are transmitted to carry data parallely across multiple channels. For example, if you are using a cable eMTA with WiFi 5 supporting OFDM, the voice and data signals will be sent and received at the same time

What is OFDMA?

OFDMA stands for Orthogonal Frequency Division Multiplexing Access. It is an extension of OFDM. When it comes to WiFi 6 (802.11ax), this technology is critical for more efficiency and lower latency for networking.

Features and advantages of OFDMA:

  1. Data packets are combined into a larger one and delivered to multiple users at once, reducing bandwidth workload and improving efficiency
  2. Increase transmission performance for long frames with lower latency
  3. Increase the number of devices connected to the router
  4. Reduce power consumption

As OFDMA combines transmissions and sends frames to multiple endpoints simultaneously, it is ideal for things like IoT devices, video, online gaming, and automation applications.

Here’s a diagram to explain their difference:

OFDM_OFDMA_difference

Hitron offers whole-home solutions including WiFi 6 gateways and WiFi extenders, to enhance your networking experience. If you would like to learn more about our solutions, please contact our Sales team.

Recent Posts

Do you need a WiFi 6 Cable Gateway?

Compared to WiFi 5, WiFi 6 can bring lots of benefits -higher performance, low latency, fast speed and broader frequency range. In 2022, WiFi 6 will become more commonly used in daily lives, at home and working places. According to WiFi Alliance’s 2022 WiFi trends...

Get Rid of Weak Wi-Fi Once and For All

A weak Wi-Fi signal means weak Wi-Fi. When you boost your Wi-Fi signal, your overall Wi-Fi coverage and performance improves. If you want to get rid of your weak Wi-Fi signal once and for all try these tips. How to Fix a Weak Wi-Fi Signal Fix your weak Wi-Fi signal...

Key Advantages of PON Internet

PON stands for passive optical network. It is a type of fiber-optic network. A PON system is designed to deliver broadband Internet access to your home or office by connecting you as a subscriber to your Internet service provider (ISP). A PON is a point-to-multipoint...

Why You Should Have a DOCSIS 3.1 Cable Modem

When you get Internet service from your cable TV provider, it typically uses the coax wiring in your home to deliver that connection via a cable modem. Every cable modem has a protocol called DOCSIS which dictates how fast your download and upload speeds will be...