Zobrazeno 1 - 10
of 41
pro vyhledávání: '"H.H. Loomis"'
Publikováno v:
IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing. 44:217-225
The process of detection of narrow-band interference to a broad-band signal in a noisy environment using adaptive filtering techniques attributable to Kwan and Martin (1989) is further refined by modifying the gradient-search algorithm to reduce hard
Publikováno v:
IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing. 42:269-274
Authors Lim and Liu (see IEEE Trans. Signal Process., vol. 40, no. 7, p.1643-51, 1992) recently introduced the "minimum order augmentation" technique for pipelining IIR digital filters which guarantees the addition of the least number of superfluous
Autor:
H.H. Loomis, W.A. Brown
Publikováno v:
IEEE Transactions on Signal Processing. 41:703-720
The issues involved in the design of computationally efficient algorithms for spectral correlation estimation and the resulting impact on high-speed digital realization are addressed. The spectral correlation analyzer is characterized as a periodical
Publikováno v:
IEEE Signal Processing Magazine. 8:38-49
Two computationally efficient algorithms for digital cyclic spectral analysis, the FFT accumulation method (FAM) and the strip spectral correlation algorithm (SSCA), are developed from a series of modifications on a simple time smoothing algorithm. T
Publikováno v:
ISCAS (5)
In a communications channel based on the timing of information, noise is introduced by any delay of the information as it is transmitted across the network. We examine this noise by measuring the deviation of timing differences as packets are transmi
Publikováno v:
[1992] Proceedings of the 35th Midwest Symposium on Circuits and Systems.
Describes a computer-aided design procedure which allows the user to enter filter specifications and the required pipelining delay and then automatically generate a pipelined infinite impulse response (IIR) filter that meets the filter specifications
Publikováno v:
[1992] Conference Record of the Twenty-Sixth Asilomar Conference on Signals, Systems & Computers.
Two adaptive sampling algorithms are proposed to eliminate narrowband interference in broadband signals: adaptive sample rate filtering and adaptive decimation filtering. The filters used are fixed-coefficient IIR or FIR digital band-pass filters wit
Autor:
H.H. Loomis, R.F. Bernstein
Publikováno v:
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers.
An architecture for the computation of time difference of arrival (TDOA) estimates is proposed. The structure of the various principal components is developed and a complexity analysis is presented. Realization using pipeline FFT and vector processin
Publikováno v:
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers.
In decoding spread-spectrum BPSK signals in the presence of narrow-band interference, a perfect reconstruction multi-rate bandpass filter bank can be used with a very simple adaptive algorithm to eliminate narrow-band interference broadband signals.
Autor:
H.H. Loomis, R.S. Roberts
Publikováno v:
ICASSP (4)
Real-time cyclic spectral analysis is useful in many applications, but is difficult to achieve because of its computational complexity. This paper studies the distribution of complex multipliers in multiprocessor cyclic spectrum analyzers, with the o