Software Defined Radio with Commercial Detection Technology Radio Commercial Detection Patent Pending For Radio Commercial Filter

Background

PSD Based Commercial Detector

With new inventions and an ever-growing mass of easily accessed digital media via the web and MP3 players, radio is falling behind as a source for music entertainment. There is a seemingly less amount of new technology that has gone into radio. This project brings life back into radio and improves the overall listening experience through the development of Radio Commercial Detection Technology. A commercial-detecting radio allows the listener to enjoy continuous music by eliminating the need to manually change stations.

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Utilizes Welch’s periodogram using a Hamming window 10 second long tracking time required for start up Window divided into eight segments with 50% overlap PSD output is monitored for maximum slope Figure 2 – RCD technology eliminates the need to change radio stations to avoid unwanted commercials

Radio Receiver Front-End The radio receiver front-end provides the FM stations for the DSP processing by downconverting the entire FM band to be centered around baseband for sampling.

System

Figure 4 – Radio receiver and DSP hardware

The commercial-detecting radio automatically changes the station to one of four preset station when a commercial is played on the current station.

Tests show that a commercial is detected within 3 seconds after transitioning from music to commercial

Figure 3 – Shows the PSD output of a commercial (left) and a song (right)

Direct Conversion Architecture

 Allows for a one-step conversion from RF frequency to baseband  Enables the ability of a slower sampling rate for greater DSP overhead

Antenna

DSP

Figure 5 – Radio receiver front-end block diagram

Radio Receiver

Software Defined Radio

Commercial Detector

Figure 1– System-level block diagram of the commercialdetecting radio

Dan Allen

[email protected]

Joshua Bullard

Tommy Morse

[email protected] [email protected]

https://sites.google.com/a/aggiemail.usu.edu/sdr_rcdf/

Software Defined Radio The software defined radio performs the following functions:  Complex mixing to perform channel selection  Filtering and decimation to isolate channel  Slope-detecting FM demodulation  Channel changing between 4 preset stations when commercials are detected Figure 6 – Block diagram of the digital part of the system

Background System

Software Defined Radio with Commercial. Detection Technology. System. The commercial-detecting radio automatically changes the station to one of four preset ...

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