Published July 2003
| Published
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Analysis of multiple antenna wireless links at low SNR
- Creators
- Rao, Chaitanya
-
Hassibi, Babak
Abstract
In the low signal-to-noise (SNR) regime when the channel is not known to both transmitter and receiver, we show that the capacity of a multiple antenna Rayleigh fading link is asymptotically quadratic in the SNR for all practical input distributions. This is much less than the known channel case where it exhibits a linear growth in the SNR. Under various signaling constraints we show that mutual information is maximized by using a single transmit antenna. Also sending training symbols offers no advantage at low SNR.
Additional Information
© 2003 IEEE. This work supported in part by the National Science Foundation under grant no. CCR-0133818, by the office of Naval Research under grant no. N00014-02-1-0578, and by Caltech's Lee Center for Advanced Networking.Attached Files
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Additional details
- Eprint ID
- 93661
- Resolver ID
- CaltechAUTHORS:20190308-135958304
- CCR-0133818
- NSF
- N00014-02-1-0578
- Office of Naval Research (ONR)
- Caltech Lee Center for Advanced Networking
- Created
-
2019-03-08Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field