Receiver architecture with digitally generated intermediate frequency

Abstract

A receiver can be configured to include an RF front end that is configured to downconvert a received signal to a baseband signal or a low Intermediate Frequency (IF) signal. The receiver can downconvert the desired signal from an RF frequency in the presence of numerous interference sources to a baseband or low IF signal for filtering and channel selection. The filtered baseband or low IF signal can be converted to a digital representation. The digital representation of the signal can be upconverted in the digital domain to a programmable IF frequency. The digital IF signal can be converted to an analog IF signal that can be processed by legacy hardware.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application No. 60 / 618,240, filed Oct. 12, 2004, entitled A RECEIVER ARCHITECTURE WITH DIGITALLY GENERATED INTERMEDIATE FREQUENCY; which is hereby incorporated herein by reference in its entirety.BACKGROUND [0002] The disclosure relates to electronic signal processing. More particularly, the disclosure relates to an RF receiver and receiver architecture. [0003] In a typical frequency division multiplex communication system, multiple transmissions can simultaneously occupy a predefined operating band. The signals within the operating band can operate according to a predetermined communication standard, and thus, can have an energy within a predictable dynamic range. The communication standard can also specify a frequency spacing between adjacent channels, and the channel bandwidth. The communication standard can also specify signal parameters, such as modulation type, information r...

AI Technical Summary

Benefits of technology

[0009] A receiver can be configured to include an RF front end that is configured to downconvert a received signal to a baseband signal or a low Intermediate Frequency (IF) signal. The receiver can downconvert the desired signal from an RF frequency in the presence of numerous interference sources to a baseband or low IF signal for

Problems solved by technology

The trend of increasing device complexity and performance while simultaneously reducing the physical size of electronic devices imposes tremendous constraints on ongoing development.

Although th

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