Transmittance modulation

The paper proposed a method to reduce the effect of nonlinear distortion in 16-APSK OFDM system, which is a pilot-based automatic phase shift at the receiver. Transmitted pilot is inserted during the OFDM modulation process in the transmitter. When the pilot passes through the HPA, information about the nonlinear distortion of the HPA will be carried

8p visergeyne 18-06-2024 1 0   Download

Part 2 book "Rang and Dale's pharmacology" includes content: Respiratory system; the kidney, the gastrointestinal tract, the control of blood glucose and drug treatment of diabetes mellitus, obesity, the pituitary and the adrenal cortex, the thyroid, the reproductive system, bone metabolism, chemical transmission and drug action in the central nervous system, amino acid transmitters, other transmitters and modulators, neurodegenerative diseases,... and other contents.

442p dianmotminh03 03-06-2024 1 0   Download

Part 1 book "Principles of electronic communication systems" includes content: Introduction to electronic communication; electronic fundamentals for communications; amplitude modulation fundamentals; amplitude modulator and demodulator circuits; fundamentals of frequency modulation; FM circuits; digital communication techniques; radio transmitters; communication receivers; multiplexing and demultiplexing; digital data transmission.

448p muasambanhan06 03-02-2024 3 1   Download

Part 1 book "Principles of electronic communication systems" includes content: Introduction to electronic communication; electronic fundamentals for communications; amplitude modulation fundamentals; amplitude modulator and demodulator circuits; fundamentals of frequency modulation; FM circuits; digital communication techniques; radio transmitters; communication receivers; multiplexing and demultiplexing.

388p muasambanhan06 03-02-2024 4 1   Download

Part 2 book "Rang and Dale's pharmacology" includes content: Chemical transmission and drug action in the central nervous system, amino acid transmitters, other transmitters and modulators, neurodegenerative diseases, general anaesthetic agents, analgesic drugs, local anaesthetics and other drugs affecting sodium channels, anxiolytic and hypnotic drugs, antiepileptic drugs, antipsychotic drugs, antidepressant drugs, psychoactive drugs, drug abuse and dependence

348p muasambanhan05 22-01-2024 4 2   Download

Part 1 of ebook "Introduction to radar systems" provides readers with contents including: the nature of radar; the radar equation; CW and frequency-modulated radar; MTI and pulse doppler radar; tracking radar; radar transmitters;...

231p tieulangtran 28-09-2023 5 2   Download

The NiO thin films were prepared by the electron beam evaporation method using synthesized sintered targets. As-prepared films were characterized using X-ray diffraction, scanning electron microscopy, UVeVIS spectroscopy and cyclic voltammetry. The thicker films were found to exhibit a well-defined structure and a well-developed crystallite size with greater transmittance modulation and durability.

8p viberbers 09-08-2023 5 3   Download

This paper presents a method of designing coils and compensation circuits to reduce output power pulsation, optimize transfer efficiency for electric vehicle dynamic wireless charging systems. The transmission lane is modularly designed. Each module has three short-track transmitter coils that are placed closely together along the moving track of the receiver and connected to a single inverter.

8p vimelindagates 18-07-2022 5 3   Download

Lecture Coding and modulation in OFDM syste. After completing this section, you will understand the knowledge about IEEE WLAN standards and specifications: Transmitter diversity; Receiver diversity; Transceiver diversity; Modulation schemes and Convolutional coding with viterbi decoder.

8p lazzaro 03-12-2021 14 2   Download

The role of the television has huge impact on the 21st century and basically the televisions either make use of SFN single frequency networks (SFN) or multi frequency networks (MFN) and both these networks are ideal for meeting the practical requirements either in local and global services. Another important drawback in these two networks are these two networks consumes huge amount of spectrum.

8p son248 24-03-2020 29 0   Download

This paper presents a simulation based study of a wireless communication system with the implementation of secured asymmetric RSA cryptographic encryption/decryption algorithm on text message transmission. The system under investigation incorporates 2/3-rated CRC channel coding and QPSK digital modulation over an additive white Gaussian noise (AWGN) channel. For tackling the security problems a text message is first RSA encrypted at the transmitter while it is decrypted at the receiver end and compared for different levels of SNR.

6p byphasse043256 21-03-2019 25 0   Download

This paper presents a detailed review of recent developments in modulation schemes, transmitter and receiver domains which will enable the realization of future high performance and cost-effective indoor optical wireless systems.

5p girlsseek 27-02-2019 27 0   Download

Tắt nguôǹ Modules, chọn tầm ngo ̃ vaò Bâṭ nguôǹ CPU va ̀Module, đơịi cho ổn đinh trong 15 phut́ Sử duṇṇ g transmitter, nguồn áp , nguồn dòng để cấp gia ́ tri ̣ 0 đối với bơỉỉ CPU Chin̉n̉ h biến trở offset cho đến khi gia ́tri ̣ vào là ̀ 0 Cấp gia ́ tri ̣ full-scale vaò cho input. Chin̉n̉ h biêńń trơ ̉ Gain đê ̉ gia ́ tri ̣ đoc̣c̣ vê ̀ la ̀ 32000

14p phanvietthang123456 18-04-2013 96 7   Download

This paper reports experimental results of a radar system design. In the radar transmitter, a 13-bit Barker code with bit duration 3.24 µs and various other codes are generated by the microcontroller PIC16F877A. This code is then used to modulate IF 10.3 MHz to become BPSK signal. A stable local oscillator is also designed by PLL, VCO, and PIC16F877A. The operation frequency range of the oscillator is from 800 MHz to 900

7p tuanlocmuido 19-12-2012 74 2   Download

Communication systems consist of an input device, transmitter, transmission medium, receiver and output device, as shown in Fig. 1.1. The input device may be a computer, sensor or oscillator, depending on the application of the system, while the output device could be a speaker or computer. Irrespective of whether a data communications or telecommunications system is used, these elements are necessary.

394p camnhung_1 14-12-2012 58 10   Download

Tendons are known to have a profound impact on the overall function of the musculoskeletal system in their role as a structural link and force transmitter between muscle and bone. Their unique viscoelastic response under tension allows efficient use and recycling of stored energy during stretch involved in locomotion, modulating joint position control, and providing protection from muscle injuries through reduction of mechanical oscillation and shock.

248p wqwqwqwqwq 21-07-2012 67 11   Download

This is an undergraduate course in digital communications, which is designed to prepare students for engineering work in high-tech industries and for graduate work in communications, signal processing, and computer systems. The course covers basic concepts and useful tools for design and performance analysis of transmitters and receivers in the physical layer of a communication system. Prerequisite: An introductory course in probability. A course in signals and systems. Texts: J.G. Proakis, M. Salehi, Communication Systems Engineering M. P. Fitz, A Course in Communication Theory Graders:...

141p ntnam113 23-05-2012 93 16   Download

S/N ratio should be above a certain threshold (a function of modulation scheme). Signal power should be above the sensitivity threshold. Predict received signal strength when the transmitter and receiver have a clear line-of-sight path between them.

57p nhq_khtn 12-03-2011 103 35   Download

Adaptive Modulation Mode Switching Optimization Mobile communications channelstypically exhibit time-variant channel quality fluctuations [ 131 and hence conventional fixed-mode modems suffer from bursts of transmission errors, even if the system was designed to provide a high link margin.

65p goixanh 22-09-2010 71 5   Download

Adaptive Modulation In this chapter, the conceptof Adaptive Quadrature AmplitudeModulation (AQAM) is introduced, whereby the modulation mode is adapted at the transmitter on a burst by burst basis. This adaptation is implemented based on thereceiver’s perceived channel qualityand its main BER. motivation is to maximise the transmission throughput at a given target In our investigations AQAM is initially applied in a narrow-band environment in conjunction with power control, where the transmitted power is only varied near the modem mode switching thresholds of the AQAM scheme.

42p goixanh 22-09-2010 75 4   Download