• No results found

Frequency Hopping Spread Spectrum

Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum

Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum

... adaptive frequency hopping is a powerful technique to deal with interference and Gilbert-Elliot channel model is a good technique to analyze the situations of channels by categorizing the channel conditions ...

6

Design and Develop Wireless System Using Frequency Hopping Spread Spectrum

Design and Develop Wireless System Using Frequency Hopping Spread Spectrum

... a frequency hopper in two meters could be made that skipped over commonly used repeater frequency ...A frequency hopped system can use analog or digital carrier modulation and can be designed using ...

8

Implementasi Frequency Hopping Spread Spectrum (FHSS) Pada DSK TMS320C6416T

Implementasi Frequency Hopping Spread Spectrum (FHSS) Pada DSK TMS320C6416T

... ada sistem komunikasi ada berbagai macam teknik yang digunakan untuk mengirim informasi/data dari pemancar ke penerima. Pada saat proses pengiriman informasi/data sering dijumpai masalah inteferensi, noise, maupun ...

6

Implementasi dan Evaluasi Kinerja Frequency Hopping Spread Spectrum (FHSS) Menggunakan WARP

Implementasi dan Evaluasi Kinerja Frequency Hopping Spread Spectrum (FHSS) Menggunakan WARP

... Frequency Hopping Spread Spectrum merupakan sinyal informasi ditransmisikan yang disebar secara random ke beberapa frekuensi ...untuk frequency hopping ...keterangan ...

6

A Review on Frequency Hopping Spread Spectrum Based Anti Jamming Improvement With Encrypted Spreading Codes

A Review on Frequency Hopping Spread Spectrum Based Anti Jamming Improvement With Encrypted Spreading Codes

... on Frequency hopping spread spectrum anti-jamming improvement with Encrypted spreading ...on frequency hopping spread spectrum modulation ...

6

Frequency Hopping Spread Spectrum Security Improvement with Encrypted Spreading Codes in a Partial Band Noise Jamming Environment

Frequency Hopping Spread Spectrum Security Improvement with Encrypted Spreading Codes in a Partial Band Noise Jamming Environment

... In spread spectrum techniques, security against tap- ping and jamming is greater compared with narrowband spectrum ...of spread spectrum are in- distinguishable from background noise to ...

6

Frequency Hopping Spread Spectrum PHY of the Wireless LAN Standard. Why Frequency Hopping?

Frequency Hopping Spread Spectrum PHY of the Wireless LAN Standard. Why Frequency Hopping?

... negative frequency offset) • The sign of DC offset contribution of the 33 symbol block is compared to sign of previous accumulated DC offset; if same sign, the block is inverted (frequency deviation ...

11

Frequency Hopping Spread Spectrum (FHSS) vs. Direct Sequence Spread Spectrum (DSSS) in Broadband Wireless Access (BWA) and Wireless LAN (WLAN)

Frequency Hopping Spread Spectrum (FHSS) vs. Direct Sequence Spread Spectrum (DSSS) in Broadband Wireless Access (BWA) and Wireless LAN (WLAN)

... carrier frequency. Using these 79 frequencies, IEEE 802.11 defines 78 hopping sequences (each with 79 hops) grouped in three sets of 26 sequences ...

16

Low Complexity Erasure Insertion in Frequency Hopping Spread Spectrum Communications Subjected to Fading and Partial Band Interference

Low Complexity Erasure Insertion in Frequency Hopping Spread Spectrum Communications Subjected to Fading and Partial Band Interference

... [2] Y. T. Su and L. der Jeng, “Antijam capability analysis of RS- coded slow frequency-hopped system,” IEEE Transactions on Communications, vol. 48, pp. 270–281, February 2000. [3] A. J. Viterbi, “A robust ...

5

Multicarrier Frequency Hopping Spread Spectrum Techniques With Quasi-Cyclic Low Density Parity Check Codes Channel Coding

Multicarrier Frequency Hopping Spread Spectrum Techniques With Quasi-Cyclic Low Density Parity Check Codes Channel Coding

... for frequency-hopping multiple- access (FHMA) network based on the triple Data Encryption Standard (DES) block cipher frequency hopping ...of frequency slots statistically independent ...

43

Spread Spectrum Sensing Techniques for Transformer Frequency Response Data

Spread Spectrum Sensing Techniques for Transformer Frequency Response Data

... C. Frequency Hopping Spread Spectrum In this method, different signals can be transmitted by s ignals randomly hop among a set of predefined arrangement of ...narrow frequency band is ...

8

Improved Performance Evaluation of Frequency Hopped spread spectrum using QAM/FSK Modulation Techniques

Improved Performance Evaluation of Frequency Hopped spread spectrum using QAM/FSK Modulation Techniques

... of Frequency Hopped spread spectrum ...in Frequency Hop Spread Spectrum System using Quadrature Amplitude modulation and Frequency shift keying which are used in defense ...

5

The Identification of Frequency Hopping Signal Using Compressive Sensing

The Identification of Frequency Hopping Signal Using Compressive Sensing

... sensing, frequency hopping signal, identification ...of frequency hopping spread spectrum (FHSS) has been extensively applied in many areas, especially in military ...

5

CiteSeerX — A unified spectral analysis of generalized time-hopping spread-spectrum signals in the presence of timing jitter

CiteSeerX — A unified spectral analysis of generalized time-hopping spread-spectrum signals in the presence of timing jitter

... two frequency-dependent factors, namely and , the latter being TH sequence ...the frequency spectrum by sequence design will have an effect on another portion of the ...of frequency, ...

13

Interleaved spread spectrum orthogonal frequency division multiplexing for system coexistence

Interleaved spread spectrum orthogonal frequency division multiplexing for system coexistence

... common frequency bands according to some coexistence mechanisms such as cooperative and non-cooperative ...control, frequency hopping and time division multiplexing technique can handle ...

18

Spread Spectrum 1

Spread Spectrum 1

... W=bandwidth of the system Ex14.4 Consider an FH/MFSK system .Let the PN generator be defined by a 20 stage linear feedback shift register with a maximal length sequence. Each state of the register dictates a new center ...

48

The Probability of Multiple Correct Packet Reception in Coded Synchronous Frequency Hopped Spread Spectrum Networks

The Probability of Multiple Correct Packet Reception in Coded Synchronous Frequency Hopped Spread Spectrum Networks

... inclusion and exclusion formula of combinatorics in order to determine the probability systematically, and we could greatly reduce the computational complexity involved in solving the resultant recursive equation upon ...

6

Opportunistic Access in Frequency Hopping Cognitive Radio Networks

Opportunistic Access in Frequency Hopping Cognitive Radio Networks

... expression for FH spread spectrum systems. A subset of the simulation experiments are executed in HIL testing to provide a limited hardware comparison. 3.2 System Boundaries The system under test (SUT) is ...

73

LTE Frequency Hopping Jammer

LTE Frequency Hopping Jammer

... LTE has three control channels in downlink, namely; Physical Control Format Indicator Channel (PCFICH), Physical Downlink Control Channel (PDCCH), and Physical Hybrid ARQ Indicator Channel (PHICH). Although it is ...

70

Orthogonal Code-Multiplexed Frequency-Domain Single-Carrier Spread Spectrum

Orthogonal Code-Multiplexed Frequency-Domain Single-Carrier Spread Spectrum

... of frequency-domain processing called SC with frequency-domain spread spectrum (SC-FDSS) [7], spreading and de-spreading are all done in frequency domain by simple copying/mapping and ...

6

Show all 10000 documents...

Related subjects