EECS 522 | Analog Integrated Circuits

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A Software Defined Radio Receiver for the AM Frequency Band

Veselin Dimitrov, Eui Min Jung, Dan Prince

Abstract

In software defined radio, the job of tuning the frequency is transferred from hardware to software on a digital signal processor (DSP).  The goal of this project is to design a tier 3 software defined radio which reads in multiple channels on the AM frequency band (500kHz – 1600kHz) and consists of an AM antenna, a low noise amplifier (LNA), a variable band-pass filter, an automatic gain control (AGC) amplifier, an analog to digital converter (ADC), and finally a DSP, in the order of signal flow.  This project will focus on the LNA, band-pass filter, and AGC.  The LNA will amplify the signal received from the AM antenna and improve the signal to noise ratio.  The filter is necessary to cut out noise and signals that are overpowering the stations of interest.  The AGC amplifies the signals of interest to uniform amplitude, which ensures a consistent resolution in the digital output.

1. Jung Ko, Vincent C. Gaudet and Robert Hang, “A Tier 3 Software Defined AM Radio,” Proceedings of the 9th International Database Engineering & Application Symposium, 2005.

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