Power spectrum

Investigating the occurrence of defects in structures is currently a major issue of significant interest. In this paper, we present experimental research findings on the relationship between the moments of the power spectrum and the presence of damage in bridge beam structures.

13p vibecca 01-10-2024 1 0   Download

In this paper, we aim to enhance spectrum efficiency in infrastructure-based Non-Orthogonal Multiple Access (NOMA) networks over Rayleigh fading channels. To achieve this, we introduce a Simultaneous Wireless Information and Power Transfer (SWIPT)-enabled Two-Way Relay (TWR) system.

9p viyoko 01-10-2024 2 1   Download

The investigation of magnetic field strength variations over subterranean layers may reveal their locations on Earth’s surface and provide physical and geometrical characteristics. Magnetic studies were carried out around Gölcük caldera lake using proton magnetometers to identify subsurface volcanic structures. The acquired data were inverted using four different edge detection algorithms such as analytic signal, tilt angle, theta map, horizontal gradient. Afterwards, the results were used to determine the locations of the anomalous structures.

17p tanmocphong 29-01-2022 14 1   Download

Today, nuclear power produces 11% of the world’s electricity. Nuclear power plants produce virtually no greenhouse gases or air pollutants during their operation. Emissions over their entire life cycle are very low.

8p christabelhuynh 29-05-2020 8 2   Download

This paper reviews the sources of attenuation, noise and distortion encountered when communicating over AC power wiring. Various technologies which have been used to address these challenges, such as spread spectrum and digital signal processing, are then examined in light of the known channel conditions. Mời các bạn cùng tìm hiểu và tham khảo nội dung thông tin tài liệu.

17p huyen06281982 15-10-2015 49 3   Download

Before we can talk about solar power, we need to talk about the sun • Need to know how much sunlight is available • Can predict where the sun is at any time • Insolation : incident solar radiation • Want to determine the average daily insolation at a site • Want to be able to chose effective locations and panel tilts of solar panels

152p tanthanh789 17-09-2013 67 14   Download

A summary is presented of some results in the literature concerning the generative powers of various formal grammars. The relative generative powers are displayed graphically.I. Introduction Many forms of grammars have been proposed in the study of such related language problems as mechanical translation, computer languages, mathematical linguistics, and the more general characterizations of natural languages.

5p nghetay_1 06-04-2013 40 2   Download

Modulator the modulated signal .AM – DSB-SC (double sideband suppressed carrier) Spectrum M ( f ) = F [m(t )] S ( f ) = F [m(t ) cos(2π f 0 t )] = F [m(t )] ∗ F [cos(2π f 0 t )] = = M ( f ) ∗ 1 [δ ( f − f 0 ) + δ ( f + f 0 )] = 2 = 1 M ( f − f0 ) + 1 M ( f + f0 ) 2 2 .AM – DSB-SC (double sideband suppressed carrier) fM Power of the modulating signal P= ∫ | M ( f ) |2 df S =...

21p feteler 27-11-2012 122 7   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Linear Motion Blur Parameter Estimation in Noisy Images Using Fuzzy Sets and Power Spectrum

8p dauphong20 10-03-2012 37 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Resource Allocation with Adaptive Spread Spectrum OFDM Using 2D Spreading for Power Line Communications

13p dauphong19 07-03-2012 55 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Rolling Element Bearing Fault Diagnosis Using Laplace-Wavelet Envelope Power Spectrum

14p dauphong19 07-03-2012 48 4   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Fair, efficient, and power-optimized spectrum sharing scheme for cognitive radio networks

42p dauphong6 05-01-2012 56 10   Download

THUẬT NGỮ AWGN Additive White Gaussian Noise Tạp âm Gauss trắng cộng BER Bit Error Rate Tỷ số bit lỗi BPSK Binary Phase Shift Keying Modulation Điều chế khóa dịch pha hai trạng thái CDMA Code Division Multiple Access Đa truy nhập phân chia theo mã DPS Delay Power Spectrum Phổ công suất trễ FFT Fast Fourier Transform Biến đổi Fourier nhanh FSR FFT time to Symbol period Ratio in an OFDM symbol Tỷ số giữa thời gian FFT và chu kỳ ký hiệu OFDM ICI Inter Carrier Interference Nhiễu giữa các sóng mang IFFT Inverse Fast Fourier Transform Biến...

20p grayswan 28-06-2011 162 36   Download

The Radio Spectrum and RF Environment Radio is the penultimate medium for mobile communications, but it has also been used for many fixed-site applications such as AM/FM broadcast, satellite trunking, point-to-point microwave telephony, and digital TV. Although there are radio applications in very low frequencies (VLF) and extremely low frequencies (ELF), these bands require extensive fixed-site infrastructure whose size and cost is dominated by the mile-long antennas and megawatt-power handling requirements. SDR insertion opportunities in these bands are limited. ...

39p tienvovan 11-09-2010 125 11   Download

Protocols for wireless applications Wireless data networks present a more constrained communication environment compared to wired networks. Because of fundamental limitations of power, available spectrum, and mobility, wireless data networks tend to have less bandwidth than traditional networks, more latency than traditional networks, less connection stability than other network technologies, and less predictable availability.

19p huggoo 20-08-2010 81 8   Download

Optimal (Wiener) filtering. The power spectrum of signal plus noise shows a signal peak added to a noise tail. The tail is extrapolated back into the signal region as a “noise model.” Subtracting gives the

10p babyuni 17-08-2010 66 6   Download

Contents: • Introduction (gi i thi ớ ệu) • Spread Spectrum Technology (công nghệ trải phổ) • DS-CDMA • Spreading Codes (mã trải phổ) • Features of CDMA Đặc tính của cdma – RAKE Receiver (bộ thu rake) – Power Control (điều khiển công suất) – Frequency Allocation (cấp phép tần số) – Soft Handoff (chuyển giao mềm)

225p icd4058 29-04-2010 263 137   Download

The two fundamental building blocks of a digital communication system are modulation and channel coding. They enable reliable communication by providing signaling schemes and receiver structures that utilize the available spectrum and power efficiently.

38p huemanvdoc 23-11-2009 125 10   Download