The Basics of Transceivers and Signal Processing

Transceivers are often used in signal processing and a part of cellular telephones, two-way radios, and mobile two-way radios. Signal transmission also requires the use of transducers to convert signals to voltage waveforms or electrical current. They may be transmitted as electromagnetic waves and then, received and converted by a transducer to a final form. Here’s what you need to know about transceivers and signal processing if your designs require their use.

The Basics of Transceivers and Signal Processing

What is Signal Processing?
Signal processing addresses the area of engineering and mathematics that deal with digitized signals and the analysis of analog signals. These signals could be sound, images, electromagnetic radiation or sensor readings. Even electrocardiograms and control system signals may be included in the signal processing category. The principles of signal processing can be traced back to the 1940s and 1950s. Some of the fields of signal processing include:

  • Audio Signal Processing – Speech and music are examples of these electrical signals that represent sound.
  • Image Processing – These signals were used in digital cameras and computers.
  • Speech Signal Processing – These signals are often used for processing and interpreting spoken words.
  • Video Processing – If designers want to interpret moving pictures, these pictures are often used.
  • Wireless Communication – For waveform generation, filtering, demodulation, and equalization, this form of signal processing is recommended.
  • Array Processing – For processing signals from arrays of sensors, signal processing may be considered.
  • Financial Signal Processing – Signal processing can be used to analyze financial data and also be used for prediction purposes.
  • Quality Improvement – Try signal processing for noise reduction, echo cancellation, image enhancement and other signal improvement.

What are Transceivers?
Transceivers allow the reception of signals during transmission. The concept of a transceiver was introduced in the early 1920s. Transceivers are comprised of both a transmitter and receiver in one single unit. If the unit has no circuitry in common, it is simply a transmitter-receiver. This technology is often used in satellite communications, cellular phone technology, and cordless phone technology.

Modern HF transceivers may have DSP capabilities and spectrum analyzer capabilities. Nearly all modern amateur radio equipment has a transceiver embedded, but the shortwave community may still use pure radio receivers. A CB radio or a walkie-talkie would be an example of a modern-day transceiver.

The RF transceiver uses RF modules to transmit data for high speed, and some digital RF technology can meet or exceed speeds of 100 GHz. The digital processors in these units are software programmable and will perform the conversion between baseband signals and analog RF.

What You Need to Know About Transceivers and Signal Processing
These are just a few things to know about transceivers and signal processing. Being aware of the basics will help make it easier to make decisions for designs. Most designers are aware of transceivers, but they may not be aware of the flexibility of the devices in designs. Use this information as a foundation to learn more about transceivers and signal processing.

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