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spread-spectrum communication signals

Detection of direct sequence spread spectrum signals

Detection of direct sequence spread spectrum signals

... sequence spread spectrum (DSSS) signaling, where codes are used to communicate secretly ...to spread the transmitted signal over a wide bandwidth, enabling communication at power levels below ...

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Broadband Interference Excision in Spread Spectrum Communication Systems Based on Short-Time Fourier Transformation

Broadband Interference Excision in Spread Spectrum Communication Systems Based on Short-Time Fourier Transformation

... direct-sequence spread spectrum (DS-SS) communication systems is ...(LFM) signals that have broadband frequency ...received signals employing short-time Fourier transformation ...

12

Channel Capacity Analysis of Spread Spectrum Watermarking in Radio Frequency Signals

Channel Capacity Analysis of Spread Spectrum Watermarking in Radio Frequency Signals

... the spread spectrum watermarking scheme [23], ...analog signals, which measures the waveform ...digital communication, the transmitted information is based on the digital ...RF signals. ...

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Implementation of acquisition & tracking algorithms of spread  spectrum signals in high dynamic scenario

Implementation of acquisition & tracking algorithms of spread spectrum signals in high dynamic scenario

... There are three methods of CDMA signal acquisition used in practice: Serial search algorithm, FFT-based methods, and the Delay-and-multiply algorithm [1]. The Serial search algorithm finds correlation in time-domain ...

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Performance Analysis of Spread Spectrum with Prime Codes in a Wireless System Over a fading Channel

Performance Analysis of Spread Spectrum with Prime Codes in a Wireless System Over a fading Channel

... wireless communication networks also have senders and receivers of ...delay spread is a typical effects the multipath ...delay spread on the signals representing the data is a shorter impulse ...

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Overlapping M ary Frequency Shift Keying Spread Spectrum Multiple Access Systems using Random Signature Sequences

Overlapping M ary Frequency Shift Keying Spread Spectrum Multiple Access Systems using Random Signature Sequences

... multiple-access spread-spectrum communication system using binary frequency shift keying (BFSK) or M-ary frequency shift keying (MFSK) and noncoherent demodulation is ...a ...

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Radar Communication Integration Based on MSK LFM Spread Spectrum Signal

Radar Communication Integration Based on MSK LFM Spread Spectrum Signal

... direct spread spectrum technology. And comparing the LFM signals in the same conditions, we can see that, although the integrated wave-form has a slight loss in the anti Doppler frequency shift, the ...

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Secure Spread Spectrum Watermarking for Telemedicine Applications

Secure Spread Spectrum Watermarking for Telemedicine Applications

... applying spread-spectrum watermarking which can be easily un- derstood with spread-spectrum communications analogy in which frequency domain of the image is viewed as a communication ...

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Implementation of Direct Sequence Spread Spectrum Communication System Using FPGA

Implementation of Direct Sequence Spread Spectrum Communication System Using FPGA

... The spread spectrum techniques for digital communication were originally developed for military applications because of their high security and their susceptibility to interference from other ...day ...

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Contemporary Spread Spectrum Techniques: A Comparative Study Ashish G. Nandre 1, Yogesh R. Risodkar2

Contemporary Spread Spectrum Techniques: A Comparative Study Ashish G. Nandre 1, Yogesh R. Risodkar2

... In adversarial conditions, following types of jammers can jam the communication: Random, Sweep and Static jammers can jam the channel permanently without sensing the ongoing transmission messages. These jammers ...

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DIFFERENT SPREADING SEQUENCES FOR PERFORMANCE COMPARISON OF DS-SS SYSTEM B Ch Kiran Patrudu*, D.Anil Prasad, B Ravi Kumar

DIFFERENT SPREADING SEQUENCES FOR PERFORMANCE COMPARISON OF DS-SS SYSTEM B Ch Kiran Patrudu*, D.Anil Prasad, B Ravi Kumar

... Spread spectrum techniques have been widely used in wired and wireless ...signal spectrum gives us many advantages such as robustness against interference and noise, low probability of intercept, ...

6

Non-Linear Chirp Spread Spectrum Communication Systems of Binary Orthogonal Keying Mode

Non-Linear Chirp Spread Spectrum Communication Systems of Binary Orthogonal Keying Mode

... implementing spread spectrum modulation: frequency hopping (FH), direct sequence (DS) and chirp spread spectrum ...to spread the spectrum of the information- bearing signal, CSS ...

211

Design of a High Range, High Efficiency Spread Spectrum Transmitter for Audio Communication Applications

Design of a High Range, High Efficiency Spread Spectrum Transmitter for Audio Communication Applications

... sequence spread spectrum transmitter with high transmission range and efficiency for audio ...for spread spectrum signal the data could reach a range of 55km in the ...

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Effect of length on Correlation of PN sequence and Gold sequence

Effect of length on Correlation of PN sequence and Gold sequence

... Wireless Communication System” regards performance analyses of Direct Sequence Code Division Multiplexing (DS-CDMA), Multi-Tone (MT) CDMA, Multi-Carrier (MC) CDMA and MC-DS-CDMA transmission systems are carried ...

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Spread Spectrum Sensing Techniques for Transformer Frequency Response Data

Spread Spectrum Sensing Techniques for Transformer Frequency Response Data

... wireless communication, the problem of data security is of greatest ...paper, spread spectrum techniques have been employed due to its advantages in providing data ...Sequence Spread ...

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SECURED COMMUNICATION USING SPREAD SPECTRUM TECHNIQUES

SECURED COMMUNICATION USING SPREAD SPECTRUM TECHNIQUES

... Spread spectrum signals such as DS-SS or FH-SS can tolerate jammers to a large extent but they are still susceptible to jammers due to their low signal ...users.Spread spectrum system provide ...

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Variable Frequency Modulation for EMI Suppressing in Power Converter

Variable Frequency Modulation for EMI Suppressing in Power Converter

... DC-DC power converters are innate powerful sources of electromagnetic interferences because of the large di/dt and dv/dt. Unlike linear regulators, which operate the power transistors in the linear mode, the Pulse Width ...

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Time-slot Assignment based mostly Channel Access theme for Reliable Transmission

Time-slot Assignment based mostly Channel Access theme for Reliable Transmission

... using spread spectrum ...dimensional spread spectrum method so that we can hide the random pattern image into low intensity and mid intensity parts of cover ...

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Concatenated Digital Watermarking System Robust to Different Removal Attacks

Concatenated Digital Watermarking System Robust to Different Removal Attacks

... Military Communication Academy, Leningrad, Soviet Union, in 1959, the MSc degree in mathe- matics from the State Leningrad University, Soviet Union, in 1969, the PhD degree and the Doctor of Philosophy degree from ...

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Design and Implementation of Wireless Gas Meter Reading System Based on Spread Spectrum Communication

Design and Implementation of Wireless Gas Meter Reading System Based on Spread Spectrum Communication

... Data concentrator completes deployment of LoRa communication network in selected area. On the one hand, data received from concentrators is aggregated here, and will be uploaded to the server through the GPRS ...

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