47 search results - page 5 / 10 » Spreading Signals in the Wideband Limit |
70
Voted
TIT
2010
14 years 4 months ago
2010
Wideband analog signals push contemporary analog-to-digital conversion systems to their performance limits. In many applications, however, sampling at the Nyquist rate is inefficie...
IH
2001
Springer
15 years 2 months ago
2001
Springer
We present a set of watermarking techniques for effective covert communication over an audio signal carrier. Watermark robustness is enabled using: (i) redundant spread-spectrum fo...
77
Voted
TIT
2010
14 years 4 months ago
2010
Spectral efficiency for asynchronous code division multiple access (CDMA) with random spreading is calculated in the large system limit. We allow for arbitrary chip waveforms and ...
DATE
2007
IEEE
15 years 4 months ago
2007
IEEE
Abstract— Modern integrated radio systems require highly linear analog/RF circuits. Two-tone simulations are commonly used to study a circuit’s nonlinear behavior. Very often, ...
77
Voted
CVPR
2004
IEEE
15 years 11 months ago
2004
IEEE
Responses of Gabor wavelets in the mid-frequency space build a local spectral representation scheme with optimal properties regarding the time-frequency uncertainty principle. How...