#### Filter Results:

- Full text PDF available (169)

#### Publication Year

1985

2017

- This year (5)
- Last 5 years (69)
- Last 10 years (142)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Brain Region

#### Cell Type

#### Key Phrases

#### Method

#### Organism

Learn More

- Brian S. Krongold, Douglas L. Jones
- ICASSP
- 2003

The high peak-to-average power ratio (PAR) in Orthogonal Frequency Division Multiplexing (OFDM) modulation systems can significantly reduce power efficiency and performance. Methods exist which alter or introduce new signal constellations to combat large signal peaks. We present a new PAR-reduction method that dynamically extends outer constellation points… (More)

- Brian S. Krongold, Kannan Ramchandran, Douglas L. Jones
- IEEE Trans. Communications
- 2000

In this paper, we present an optimal, computationally efficient, integer-bit power allocation algorithm for discrete multitone modulation. Using efficient lookup table searches and a Lagrange-multiplier bisection search, our algorithm converges faster to the optimal solution than existing techniques and can replace the use of suboptimal methods because of… (More)

- Henrik V. Sorensen, Douglas L. Jones, Michael T. Heideman, C. Sidney Burrus
- IEEE Trans. Acoustics, Speech, and Signal…
- 1987

This tutorial paper describes the methods for constructing fast algorithms for the computation of the discrete Fourier transform (DFT) of a real-valued series. The application of these ideas to all the major fast Fourier transform (FFT) algorithms is discussed, and the various algorithms are compared. We present a new implementation of the real-valued… (More)

- Douglas L. Jones, Richard G. Baraniuk
- IEEE Trans. Signal Processing
- 1995

Time-frequency representations with fixed windows or kernels figure prominently in many applications, but perform well only for limited classes of signals. Representations with signal-dependent kernels can overcome this limitation. However, while they often perform well, most existing schemes are blockoriented techniques unsuitable for on-line… (More)

- Richard G. Baraniuk, Douglas L. Jones
- IEEE Trans. Signal Processing
- 1995

Unitary similarity transformations furnish a powerful vehicle for generating innnite generic classes of signal analysis and processing tools based on concepts diierent from time, frequency, and scale. Implementation of these new tools involves simply preprocessing the signal by a unitary transformation , performing standard processing techniques on the… (More)

- Richard G. Baraniuk, Douglas L. Jones
- IEEE Trans. Signal Processing
- 1993

Time-frequency distributions (TFD’s), which indicate the energy content of a signal as a function of both time and frequency, are powerful tools for time-varying signal analysis. The lack of a single distribution that is “best” for all applications has resulted in a proliferation of TFD’s, each corresponding to a different, fixed mapping from signals to the… (More)

- Brian S. Krongold, Douglas L. Jones
- IEEE Transactions on Signal Processing
- 2004

Common to all orthogonal frequency division multiplexing (OFDM) systems is a large peak-to-average-power ratio (PAR), which can lead to low power efficiency and nonlinear distortion at the transmit power amplifier. Tone reservation uses other unused or reserved tones to design a peak-cancelling signal that lowers the PAR of a transmit OFDM block. In… (More)

- Henrik V. Sorensen, Douglas L. Jones, C. Sidney Burrus, Michael T. Heideman
- IEEE Trans. Acoustics, Speech, and Signal…
- 1985

It has long been known that a fixed ordering of optimization phases will not produce the best code for every application. One approach for addressing this phase ordering problem is to use an evolutionary algorithm to search for a specific sequence of phases for each module or function. While such searches have been shown to produce more efficient code, the… (More)

- Wanghong Yuan, Klara Nahrstedt, Sarita V. Adve, Douglas L. Jones, Robin Kravets
- IEEE Transactions on Mobile Computing
- 2006

Mobile devices primarily processing multimedia data need to support multimedia quality with limited battery energy. To address this challenging problem, researchers have introduced adaptation into multiple system layers, ranging from hardware to applications. Given these adaptive layers, a new challenge is how to coordinate them to fully exploit the… (More)