# IEEE Transactions on Circuits and Systems

## Filter Results

Displaying Results 1 - 17 of 17
• ### Arbitrary phase polynomials for sampled-data systems

Publication Year: 1988, Page(s):132 - 133
Cited by:  Papers (1)
| | PDF (116 KB)

A simple method is proposed for generating a polynomial of degree n to match a prescribed phase at a specified set of frequencies on the unit circle in the Z-plane. This class of polynomials is very useful for designing recursive digital filters with flat group delay or linear phase. The proposed polynomials are easy to adopt for designing all-pass digital circuits View full abstract»

• ### A nonlinear adaptive digital filter

Publication Year: 1988, Page(s):127 - 131
Cited by:  Papers (10)
| | PDF (340 KB)

An adjustable, memoryless, single-valued, monotonic nonlinearity is introduced between the output point of a linear adaptive FIR (finite-impulse response) filter and the output point of the system. A control strategy is derived that permits the simultaneous shaping of both the power spectrum and the amplitude-density function of the system output by jointly adjusting the shape of the nonlinearity ... View full abstract»

• ### Design of computationally efficient interpolated FIR filters

Publication Year: 1988, Page(s):70 - 88
Cited by:  Papers (133)  |  Patents (5)
| | PDF (1536 KB)

The number of multipliers required in the implementation of interpolated FIR (Finite-impulse response) filters in the form H(Z)=F(zL)G( z) is studied. Both single-stage and multistage implementations of G(z) are considered. Optimal decompositions requiring fewest number if multipliers are given for some representati... View full abstract»

• ### Modified stability table for 2-D digital filters

Publication Year: 1988, Page(s):116 - 119
Cited by:  Papers (72)
| | PDF (284 KB)

A modified stability table is obtained for checking the stability of 2-D digital filters. In this table, the appropriate entries of the first column are equivalent to the appropriate minors of the Hermitian Schur-Cohn matrix. Thus the positivity of the latter matrix requires the positivity checking of the (n-1) appropriate entries for one point, and the last entry, which is equivalent to ... View full abstract»

• ### Circuit partitioning simplified

Publication Year: 1988, Page(s):2 - 5
Cited by:  Papers (43)  |  Patents (1)
| | PDF (272 KB)

The key concepts of tearing' are presented. Tearing is a means of circuit partitioning with a formal mechanism for piecing together the subcircuit solutions to yield the composite result. The implications of a single torn' element are examined, and the pertinent results for multiple partitioning are discussed View full abstract»

• ### Adaptive algorithms with an automatic gain control feature

Publication Year: 1988, Page(s):122 - 127
Cited by:  Papers (56)  |  Patents (1)
| | PDF (496 KB)

An automatic gain control (AGC) scheme is introduced for adaptive algorithms that are used extensively in many applications. The scheme is realized by using an estimate of the cross correlation between the adaptation error and the input signal to control the gain of the adaptive algorithm. When the cross correlation is high, the gain is also high, and the adaptive algorithm is in an active' state... View full abstract»

• ### Analysis and correction of VLSI delay measurement errors due to transmission-line effects

Publication Year: 1988, Page(s):19 - 25
Cited by:  Papers (3)
| | PDF (356 KB)

In the testing of VLSI chips that have more than 128 pins, it is necessary to measure the signals from the devices under test (DUT) at the far end of transmission lines 50 cm or more away from the contact pads. The measurement suffers form waveform distortions and errors that are caused by the intrinsic delay of the transmission lines and the loading conditions at both ends of the transmission lin... View full abstract»

• ### Parasitic-tolerant components simulation type switched-capacitor filters using unity-gain buffers

Publication Year: 1988, Page(s):35 - 42
Cited by:  Papers (8)
| | PDF (620 KB)

Novel switched-capacitor transconductance elements that are free from resistive effects due to parasitic capacitances are used to realize the filters. The absence of resistive parasitics lowers the overall parasitic sensitivity of such filters. The remaining small deviations in the response can be overcome by simple predistortion. Computer simulation on a sixth-order bandpass filter is presented View full abstract»

• ### Adaptive schemes for noise filtering and edge detection by use of local statistics

Publication Year: 1988, Page(s):57 - 69
Cited by:  Papers (32)  |  Patents (6)
| | PDF (1988 KB)

Some adaptive schemes for noise filterings and edge detection of digital signals are developed. They are bases on the minimum-mean-square-error estimate of the information-bearing signal corrupted by additive noise. The estimate is computed using the local statistics of the input signal and noise. The output is fed back to the input, and the difference between the input and the output is used as t... View full abstract»

• ### Floating point error analysis of two-dimensional, fast Fourier transform algorithms

Publication Year: 1988, Page(s):112 - 115
Cited by:  Papers (10)
| | PDF (324 KB)

Floating-point error is conducted for three algorithms commonly used for the calculation of two-dimensional fast Fourier transforms (FFTs), namely, the conventional row-column FFT, the vector-radix FFT, and the polynomial-transform FFT. The respective errors are determined both analytically and on the basis of computer simulation. Comparison shows that the vector-radix FFT and the polynomial-trans... View full abstract»

• ### Systolic array implementation of H(z-1)=(a0+a 1Z-N+a2Z-2N)/(1+b1 Z-N +b2Z-2N) for N⩾2

Publication Year: 1988
Cited by:  Papers (1)
| | PDF (72 KB)

A novel systolic array for the implementation of a second-order IIR (infinite-impulse response) transfer function expressed in terms of Z-N is presented. The array is suitable for any value of N greater than or equal to two. The major advantages of this systolic array include nearest-neighbour interconnection and a requirements of only three identical basic cells View full abstract»

• ### Structure of the submarking-reachability problem and network programming

Publication Year: 1988, Page(s):89 - 100
Cited by:  Papers (9)
| | PDF (1032 KB)

Using a linear programming formulation, a unified treatment of the submarking-reachability problem for both capacitated and uncapacitated marked graphs is presented. In both cases, the problem reduces to that of testing feasibility of the dual transshipment problem of operations research. An algorithm called REACH is presented for the feasibility testing problem; its worst-case time complexity is ... View full abstract»

• ### Triple matrix product architectures for fast signal processing

Publication Year: 1988, Page(s):119 - 122
Cited by:  Papers (18)  |  Patents (1)
| | PDF (344 KB)

A procedure is introduced to determine highly concurrent representation of linear algorithms. The technique replaces matrix/vector operations by sums of small-size triple matrix products. A specially dedicated array architecture performs each triple product without intermediate I/O operations. The highly concurrent representation is shown to be possible for any linear algorithm. The special archit... View full abstract»

• ### Nonlinear echo cancellers based on transpose distributed arithmetic

Publication Year: 1988, Page(s):6 - 18
Cited by:  Papers (32)  |  Patents (4)
| | PDF (816 KB)

The design and performance of an echo canceller used in a full-duplex multilevel digital baseband transmission system are described. The system suffers from mild nonlinearity due to tolerancing of analog components in its transmitter. The nonlinearity is dealt with in the echo canceller by recourse to a nonlinear adaptive filter based on the use of transpose distributed arithmetic. Filter structur... View full abstract»

• ### Loss-free gyrator realization

Publication Year: 1988, Page(s):26 - 34
Cited by:  Papers (30)  |  Patents (1)
| | PDF (660 KB)

A loss-free time-variable gyrator (TVG) based on the power-out-equals-power-in (POPI) concept is presented. The POPI is a black box' without source elements, in which the instantaneous output power equals the input. A method based on a controlled time-variable transformer is presented, and it is noted that based on the same method, transformer realization by means of a single-controlled gyrator c... View full abstract»

• ### Modular architectures for two-dimensional digital signal processing

Publication Year: 1988, Page(s):43 - 56
Cited by:  Papers (9)
| | PDF (900 KB)

The implementation of highly modular two-dimensional (2-D) digital filters is addressed. The idea of matrix decomposition is used to provide increased parallelism and regularity. Four different structures, namely, the transversal, the distributed arithmetic, the stored product, and the systolic array, are considered. For comparison purposes, the direct implementation is included. An analysis of ea... View full abstract»

• ### Canonical piecewise-linear representation

Publication Year: 1988, Page(s):101 - 111
Cited by:  Papers (96)
| | PDF (800 KB)

Every continuous piecewise-linear function of one variable f :R1→R1 has a unique canonical piecewise-linear representation. However, only a subclass of higher-dimensional piecewise-linear functions f:Rn→Rn, n>1, has a canonical piecewise-linear representation. It is proved that t... View full abstract»