• Title/Summary/Keyword: low-complexity design

Search Result 347, Processing Time 0.023 seconds

A Study on the Relationships between Complex and Preference by Perceptual-cognitive and Affective Judgement - Focused on the Commercial Interior Design - (지각적-인지적 판단과 감정적 판단에 따른 복잡성과 선호도의 관계 - 상업공간의 실내디자인을 중심으로 -)

  • Choi Eun-Hee;Kwon Young-Gull
    • Korean Institute of Interior Design Journal
    • /
    • v.15 no.3 s.56
    • /
    • pp.173-183
    • /
    • 2006
  • Design is inseparably related to aesthetics. In spite of that, it is difficult to explain the precise aesthetic variables that affect the aesthetic value of space or environment. Therefore, this study intended to find the relationships between aesthetic variables by perceptual and affective judgement for space design with focus on complexity and preference variables. The research found low level of 'arousing' as well as high levels of affective dimension variables 'pleasant' and 'relaxing' evoked high preference. High preference also appeared in space design cases with high unity, order, and clarity with low contrast and complexity, which are variables of perceptual dimension. Complexity, one variables of preference by Kaplan, is in an inverse proportion to space preference. Thus, space design with high complexity has high level of 'exciting' and 'arousing' affective responses and relatively low level of 'relaxing' response. Additionally, it was confirmed that the most importantly influential factor on complexity was diverse components rather than visual richness and ornamentation.

A High-Speed 2-Parallel Radix-$2^4$ FFT Processor for MB-OFDM UWB Systems (MB-OFDM UWB 통신 시스템을 위한 고속 2-Parallel Radix-$2^4$ FFT 프로세서의 설계)

  • Lee, Jee-Sung;Lee, Han-Ho
    • Proceedings of the IEEK Conference
    • /
    • 2006.06a
    • /
    • pp.533-534
    • /
    • 2006
  • This paper presents the architecture design of a high-speed, low-complexity 128-point radix-$2^4$ FFT processor for ultra-wideband (UWB) systems. The proposed high-speed, low-complexity FFT architecture can provide a higher throughput rate and low hardware complexity by using 2-parallel data-path scheme and single-path delay-feedback (SDF) structure. This paper presents the key ideas applied to the design of high-speed, low-complexity FFT processor, especially that for achieving high throughput rate and reducing hardware complexity. The proposed FFT processor has been designed and implemented with the 0.18-m CMOS technology in a supply voltage of 1.8 V. The throughput rate of proposed FFT processor is up to 1 Gsample/s while it requires much smaller hardware complexity.

  • PDF

Robust Low-complexity Design for Tracking Control of Uncertain Switched Pure-feedback Systems with Unknown Control Direction (미지의 방향성을 갖는 불확실한 스위치드 순궤환 시스템의 추종 제어를 위한 강인 저 복잡성 설계)

  • Lee, Seung-Woo;Yoo, Sung-Jin
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.66 no.1
    • /
    • pp.153-158
    • /
    • 2017
  • This paper investigates a robust low-complexity design problem for tracking control of uncertain switched pure-feedback systems in the presence of unknown control direction. The completely unknown non-affine nonlinearities are assumed to be arbitrarily switched. By combining the nonlinear error transformation technique and Nussbaum-type functions, a robust tracking controller is designed without using any adaptive function approximators. Thus, compared with existing results, the proposed control scheme has the low-complexity property. From Lyapunov stability theory, it is shown that the tracking error remains within the preassigned transient and steady-state error bounds.

Low-Complexity Triple-Error-Correcting Parallel BCH Decoder

  • Yeon, Jaewoong;Yang, Seung-Jun;Kim, Cheolho;Lee, Hanho
    • JSTS:Journal of Semiconductor Technology and Science
    • /
    • v.13 no.5
    • /
    • pp.465-472
    • /
    • 2013
  • This paper presents a low-complexity triple-error-correcting parallel Bose-Chaudhuri-Hocquenghem (BCH) decoder architecture and its efficient design techniques. A novel modified step-by-step (m-SBS) decoding algorithm, which significantly reduces computational complexity, is proposed for the parallel BCH decoder. In addition, a determinant calculator and a error locator are proposed to reduce hardware complexity. Specifically, a sharing syndrome factor calculator and a self-error detection scheme are proposed. The multi-channel multi-parallel BCH decoder using the proposed m-SBS algorithm and design techniques have considerably less hardware complexity and latency than those using a conventional algorithms. For a 16-channel 4-parallel (1020, 990) BCH decoder over GF($2^{12}$), the proposed design can lead to a reduction in complexity of at least 23 % compared to conventional architecttures.

Low Complexity Vector Quantizer Design for LSP Parameters

  • Woo, Hong-Chae
    • The Journal of the Acoustical Society of Korea
    • /
    • v.17 no.3E
    • /
    • pp.53-57
    • /
    • 1998
  • Spectral information at a speech coder should be quantized with sufficient accuracy to keep perceptually transparent output speech. Spectral information at a low bit rate speech coder is usually transformed into corresponding line spectrum pair parameters and is often quantized with a vector quantization algorithm. As the vector quantization algorithm generally has high complexity in the optimal code vector searching routine, the complexity reduction in that routine is investigated using the ordering property of the line spectrum pair. When the proposed complexity reduction algorithm is applied to the well-known split vector quantization algorithm, the 46% complexity reduction is achieved in the distortion measure compu-tation.

  • PDF

DESIGN-ORIENTED AERODYNAMIC ANALYSES OF HELICOPTER ROTOR IN HOVER (정지비행 헬리콥터 로터의 설계를 위한 공력해석)

  • Jung H.J.;Kim T.S.;Son C.H.;Joh C.Y.
    • Journal of computational fluids engineering
    • /
    • v.11 no.3 s.34
    • /
    • pp.1-7
    • /
    • 2006
  • Euler and Navier-Stokes flow analyses for helicopter rotor in hover were performed as low and high fidelity analysis models respectively for the future multidisciplinary design optimization(MDO). These design-oriented analyses possess several attributes such as variable complexity, sensitivity-computation capability and modularity which analysis models involved in MDO are recommended to provide with. To realize PC-based analyses for both fidelity models, reduction of flow domain was made by appling farfield boundary condition based on 3-dimensional point sink with simple momentum theory and also periodic boundary condition in the azimuthal direction. Correlations of thrust, torque and their sensitivities between low and high complexity models were tried to evaluate the applicability of these analysis models in MDO process. It was found that the low-fidelity Euler analysis model predicted inaccurate sensitivity derivatives at relatively high angle of attack.

Low-Complexity Design of Quantizers for Distributed Systems

  • Kim, Yoon Hak
    • Journal of information and communication convergence engineering
    • /
    • v.16 no.3
    • /
    • pp.142-147
    • /
    • 2018
  • We present a practical design algorithm for quantizers at nodes in distributed systems in which each local measurement is quantized without communication between nodes and transmitted to a fusion node that conducts estimation of the parameter of interest. The benefits of vector quantization (VQ) motivate us to incorporate the VQ strategy into our design and we propose a low-complexity design technique that seeks to assign vector codewords into sets such that each codeword in the sets should be closest to its associated local codeword. In doing so, we introduce new distance metrics to measure the distance between vector codewords and local ones and construct the sets of vector codewords at each node to minimize the average distance, resulting in an efficient and independent encoding of the vector codewords. Through extensive experiments, we show that the proposed algorithm can maintain comparable performance with a substantially reduced design complexity.

Evaluation of Planning Transparence of User Interface Reflecting State Schemas (스키마 개념을 도입한 사용자 계획수립의 용이도 평가)

  • ;Yoon, Wan Chul
    • Journal of the Korean Operations Research and Management Science Society
    • /
    • v.17 no.2
    • /
    • pp.45-54
    • /
    • 1992
  • It become increasingly important to design user interface to carry low complexity. The cognitive limitations of users severely restrict utility of highly intelligent but complex modern systems. Since humans are known to use schemas to reduce cognitive complexity, imposing good consistency to an interface design that may help that user form useful schemas will provide powerful control over the complexity. This present a research effort to develop a quantitative method for evaluating interface complexity that the user would experience planning his or her course of action. Taking into account the user's potential schemas, a quantitative measure based on information theory was develped to assess the navigational complexity. This approach does not rely on the subjective judgment of the researcher as most schemes dealing with user schemas do. The proposed method may benefit the rapid prototyping approach to design a better user interface by allowing handy assessment of the design.

  • PDF

Low Complexity GF(2$^{m}$ ) Multiplier based on AOP (회로 복잡도를 개선한 AOP 기반의 GF(2$^{m}$ ) 승산기)

  • 변기영;성현경;김흥수
    • Proceedings of the IEEK Conference
    • /
    • 2003.07c
    • /
    • pp.2633-2636
    • /
    • 2003
  • This study focuses on the new hardware design of fast and low-complexity multiplier over GF(2$\^$m/). The proposed multiplier based on the irreducible all one polynomial (AOP) of degree m, to reduced the system's complexity. It composed of Cyclic Shift, Partial Product, and Modular Summation Blocks. Also it consists of (m+1)$^2$2-input AND gates and m(m+1) 2-input XOR gates. Out architecture is very regular, modular and therefore, well-suited for VLSI implementation.

  • PDF

Design of Low-Power and Low-Complexity MIMO-OFDM Baseband Processor for High Speed WLAN Systems (고속 무선 LAN 시스템을 위한 저전력/저면적 MIMO-OFDM 기저대역 프로세서 설계)

  • Im, Jun-Ha;Cho, Mi-Suk;Jung, Yun-Ho;Kim, Jae-Seok
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.33 no.11C
    • /
    • pp.940-948
    • /
    • 2008
  • This paper presents a low-power, low-complexity design and implementation results of a high speed multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) wireless LAN (WLAN) baseband processor. The proposed processor is composed of the physical layer convergence procedure (PLCP) processor and physical medium dependent (PMD) processor, which have been optimized to have low-power and reduced-complexity architecture. It was designed in a hardware description language (HDL) and synthesized to gate-level circuits using 0.18um CMOS standard cell library. As a result, the proposed TX-PLCP processor reduced the power consumption by as much as 81% over the bit-level operation architecture. Also, the proposed MIMO symbol detector reduced the hardware complexity by 18% over the conventional SQRD-based architecture with division circuits and square root operations.