Direct Sequence Spread Spectrum
Detection of direct sequence spread spectrum signals
... This thesis considers the non-cooperative or blind detection of a specific class of covert communication signals, known as direct sequence spread spectrum (DSSS). DSSS is a low probability of ...
204
Direct-sequence spread-spectrum ultrasonic testing device
... Direct-sequence spread-spectrum ultrasonic testing device Abstract Techniques for providing an ultrasonic flaw detection system are ...wide-band direct-sequence ...
16
Direct Sequence Spread Spectrum with Barker Code and QPSK
... - Spread Spectrum technique is a digital passband ...the Direct Sequence Spread ...of Direct Sequence Spread Spectrum, then, we simulate Direct ...
6
An improved algorithm for channel allocation on direct sequence spread spectrum
... The Wireless LAN standard 802.11b and 802.11g in the process of distributing data using Direct Sequence Spread Spectrum (DSSS) technology (Goldsmith, 2005). DSSS works by taking a data stream ...
25
Implementation of Direct Sequence Spread Spectrum Communication System Using FPGA
... PN sequence we cannot encrypt our original message ...PN sequence generated by a polynomial ...PN sequence but here using a XOR gate only for generating PN sequence in the data flow ...PN ...
9
A Study of Direct Sequence Spread Spectrum Technique for Data Compression Purpose
... the Direct Sequence Spread Spectrum (DS-SS) technique that has been widely used in wireless communications and digital watermarking applications is considered for the use in a compression ...
13
Using chaotic sequence in direct sequence spread spectrum based on code division multiple access (DS CDMA)
... Direct sequence spread spectrum is one of the spread spectrum ...(PN) sequence is used for DS-CDMA systems, but it lacks security due to fact that there is limited number ...
10
COMPARISON OF JAMMING EXCISION METHODS FOR DIRECT SEQUENCE/SPREAD SPECTRUM (DS/SS) MODULATED SIGNAL
... ABSTRACT Direct Sequence/Spread-Spectrum (DSSS) signals are characterized by a wide bandwidth and a low-power spectral density. These characteristics make them very robust with respect to the ...
11
The Effect of Channel Coding Rate on the Resistance of Direct-Sequence Spread-Spectrum Communication Systems to Narrow-Band Interference
... in direct-sequence spread-spectrum systems with different receiver’s ...coded spread-spectrum system on the basis of reducing the effect of ...
15
Implementasi Dan Evaluasi Kinerja Direct Sequence Spread Spectrum Menggunakan Wireless Open-Access Research Platform (WARP)
... adalah Direct Sequence Spread Spectrum (DSSS) dimana informasi akan dikalikan secara langsung dengan pseudo-noise sequence yang mempunyai laju chip jauh lebih besar, sehingga sinyal ...
6
Enhanced direct sequence spread spectrum (eDSSS) Method to Mitigate SINR mismatch in LTE-Wi-Fi integrated networks
... Demand of data usage and increase of subscribers in Long Term Evolution (LTE) has urged Third Group Partnership Project (3GPP) to find a solution of traffic data growth. In Release 12, the 3GPP introduced Wi-Fi as an ...
7
V4: DIRECT SEQUENCE SPREAD SPECTRUM MODULATION AND DEMODULATION... 1
... Figure 5‐1: DSSS correlation based demodulator. The signal r(t) comes from the channel model and includes filtering and noise addition. The spread codes are tiled into a vector of length N. These vectors are ...
21
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] ...
98
Frequency Hopping Spread Spectrum (FHSS) vs. Direct Sequence Spread Spectrum (DSSS) in Broadband Wireless Access (BWA) and Wireless LAN (WLAN)
... as Spread Spectrum modulation and has its origins in the ...of Spread Spectrum technologies, one can mention the inherent transmission security, resistance to interference from other radio ...
16
COMPARISON OF JAMMING EXCISION METHODS FOR DIRECT SEQUENCE/SPREAD SPECTRUM (DS/SS) MODULATED SIGNAL
... combinations of missing value techniques with attribute subset selection methods, we found that the combination of replacement with mean as a missing value replaceme[r] ...
7
COMPARISON OF JAMMING EXCISION METHODS FOR DIRECT SEQUENCE/SPREAD SPECTRUM (DS/SS) MODULATED SIGNAL
... follow Zhang and presented a novel group access authentication and key agreement protocol for machine type communication to reduce authentication signaling costs and net[r] ...
10
COMPARISON OF JAMMING EXCISION METHODS FOR DIRECT SEQUENCE/SPREAD SPECTRUM (DS/SS) MODULATED SIGNAL
... The method consists of four main stages: image acquisition (image is downloaded from CASIA Database), preprocessing, feature extraction using Local Line Binary Patt[r] ...
7
COMPARISON OF JAMMING EXCISION METHODS FOR DIRECT SEQUENCE/SPREAD SPECTRUM (DS/SS) MODULATED SIGNAL
... the 24 bit IV being delivered through the utilization of WEP [15]. Also, the initialization vector could not be used for diversified messages because of not being big enough. An intruder can easily get access to the ...
22
COMPARISON OF JAMMING EXCISION METHODS FOR DIRECT SEQUENCE/SPREAD SPECTRUM (DS/SS) MODULATED SIGNAL
... The advantage of applying Hash Spatial Vector- based Template Authentic Key Generation algorithm in MBUAC-A scheme is that the corresponding user biometric keys are generated[r] ...
14
COMPARISON OF JAMMING EXCISION METHODS FOR DIRECT SEQUENCE/SPREAD SPECTRUM (DS/SS) MODULATED SIGNAL
... The PID controller is design using Ziegler Nichols method and tuned for obtaining the best controller gains, the LQR controller utilizes four different controller gains to [r] ...
7