direct sequence spread spectrum communication systems
The Effect of Channel Coding Rate on the Resistance of Direct-Sequence Spread-Spectrum Communication Systems to Narrow-Band Interference
... DS-SS systems is ...a spread- spectrum demodulator, the NBI could be modeled as an additive white ...a spread-spectrum demodulator can be modeled as a Gaussian ...
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FPGA Implimentation of DSSS Transmitter Using Pseudo Chaotic Sequence
... transfer systems are reduced by a new data transfer technology known as Spread spectrum (SS) ...technology[1]. Spread spectrum technology provides strong secure communication ...
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Using chaotic sequence in direct sequence spread spectrum based on code division multiple access (DS CDMA)
... Chaotic sequence is non-converging and non- periodic sequence that exhibits noise-like behavior through its sensitive dependence on its initial ...Chaotic systems have sensitive dependence on their ...
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Analysis of Simulation Parameters of Pulse Shaping FIR Filter for WCDMA
... IMT-2000 direct spread ...a Direct Sequence Spread Spectrum (DSSS) signal through the processing gain and the coding gain can be used to enable many DSSS signals to occupy the ...
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Effect of Length on Correlation of PN Sequence and Gold Sequence
... ABSTRACT: Spread spectrum modulation technique is different from the conventional communication ...Pseudo-random sequence is the basis of spread spectrum communication ...
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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 ...
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Detection of direct sequence spread spectrum signals
... wireless communication devices, techniques to efficiently use and manage system resources, such as the available radio frequency (RF) spectrum, have been developed and are implemented in these devices to ...
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Effectiveness of Multimedia Learing on achievement in Biology
... computer systems embed the secret memo in the digital audio ...of communication in today’ ...modified Direct Sequence Spread spectrum) and cryptography (using advanced random ...
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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 ...after ...
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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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Design of a direct sequence spread spectrum system for power line communication
... O'Neal, Jr., "Overview of Power Distribution Line Carrier Communications Systems," IEEE C;~obat. Telecommunications Conference, Nov[r] ...
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FHSS, DSSS, And Hybrid DS/FH Performance Evaluation For VSAT
... in communication systems has become a part of our daily ...of communication because they cover a large geographical areas, they offer a vast categories of applications such as telecommunications, ...
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Chaos based Communication System Using Reed Solomon (RS) Coding for AWGN & Rayleigh Fading Channels
... A direct application of chaos theory to telecommunication systems appears in a conventional digital spread spectrum, where the information is spread over a wider band by using a chaotic ...
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CORRELATIVE ANALYSIS OF CYCLOSTATIONARY FEATURE DETECTION AND ENERGY DETECTION USING SIMULINK
... In this Paper we have executed Simulink based spectrum sensing methods, Energy detection and Cyclostationary feature detection Method. The Energy detection (ED) method for spectrum sensing (SS) is carried ...
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BER Calculation for CDMA System Using PN & Gold Sequence
... a Direct Sequence Spread Spectrum (DSSS) system, random binary data having bit rate of rb bits per sec is Exclusive Ored by a pseudorandom binary waveform, which is at much higher rate and it ...
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Enabling dynamic spectrum access using SS MC CDMA
... By combining frequency domain and time domain dispersal of modulated symbols, two main variants of multi-carrier spread spectrum systems, the MC-CDMA and MC direct sequence CDMA MC-DS-CD[r] ...
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Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems
... offer spectrum agility and greater robustness to ...data spread on all sub- carriers where as in an M-Modification, the length of spreading code need not be equal to the number of subcarriers and thus it ...
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Implementing Multiple Security for Audio Steganography
... of communication in today’ ...modified Direct Sequence Spread spectrum) and cryptography (using advanced random permutation with multiple key applications) has been proposed in this ...
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Mitigationof Security Risk in Satellite Communication by using Turbo coded DSSS
... In a distinctive turbo decoding, two decoders function iteratively and go by their conclusions and all iteration responsible for results. The soft outputs are produced by decoders for the improvement of the decoding ...
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SECURED COMMUNICATION USING SPREAD SPECTRUM TECHNIQUES
... secured communication using spread spectrum ...noise sequence combines with the input digital data and this modified signal is to be modulated by BPSK technique in order to reduce the jamming ...
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