Referenced Items are not available for this document.
After being the subject of speculation for many years, a software-defined radio receiver concept has emerged that is suitable for mobile handsets. A key step forward is the realization that in mobile handsets, it is enough to receive one channel with any bandwidth, situated in any band. Thus, the front-end can be tuned electronically. Taking a cue from a digital front-end, the receiver's flexible analog baseband samples the channel of interest at zero IF, and is followed by clock-programmable downsampling with embedded filtering. This gives a tunable selectivity that exceeds that of an RF prefilter, and a conversion rate that is low enough for A/D conversion at only milliwatts. The front-end consists of a wideband low noise amplifier and a mixer tunable by a wideband LO. A 90-nm CMOS prototype tunes 200 kHz to 20-MHz-wide channels located anywhere from 800 MHz to 6 GHz
Published in:
Solid-State Circuits, IEEE Journal of
(Volume:42
,
Issue:
5
)
Date of Publication: May 2007
- Page(s):
- 954 - 966
- ISSN :
- 0018-9200
- INSPEC Accession Number:
- 9435022
- Digital Object Identifier :
- 10.1109/JSSC.2007.894307
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 23 April 2007
- Issue Date :
- May 2007
- Sponsored by :
- IEEE Solid-State Circuits Society
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