Results 11 to 20 of about 3,780,505 (270)

Linear spans of optimal sets of frequency hopping sequences [PDF]

open access: yesRAIRO - Theoretical Informatics and Applications, 2012
Summary: Frequency hopping sequences sets are required in frequency hopping code division multiple access systems. For the anti-jamming purpose, frequency hopping sequences are required to have a large linear span. In this paper, by using a permutation polynomial \(\delta (x)\) over a finite field, we transform several optimal sets of frequency hopping
Juntao Gao, Yupu Hu, Xuelian Li
openaire   +4 more sources

New class of frequency-hopping sequences set with optimal average Hamming correlation property [PDF]

open access: yesTongxin xuebao, 2012
The average Hamming correlation is an important performance parameter of frequency-hopping sequences.A generalization of Whiteman cyclotomy was proposed and then some properties of the new defined cyclotomy classes were presented.Based on the ...
Pin-hui KE   +2 more
doaj   +3 more sources

Linear complexity of two classes of optimal sets frequency-hopping sequences [PDF]

open access: yesTongxin xuebao, 2012
By using a type of permutation polynomials which were different from power permutations,the two classes of frequency-hopping sequence sets with low linear complexity was transformed into the ones with high linear complexity.The exact values of linear ...
Jun-tao GAO   +3 more
doaj   +3 more sources

Further combinatorial constructions for optimal frequency-hopping sequences [PDF]

open access: yesJournal of Combinatorial Theory, Series A, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gennian Ge   +2 more
openaire   +3 more sources

Blind Joint Soft-Detection Assisted Slow Frequency-Hopping Multicarrier DS-CDMA [PDF]

open access: yes, 2000
A novel multiple-access scheme based on slow frequency-hopping multicarrier direct-sequence, code-division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrow-band ...
Yang, L-L., Hanzo, L.
core   +2 more sources

Multi-group frequency hopping OFDMA based on statistical multiplexing [PDF]

open access: yes, 2008
In this paper, the multi-group frequency hopping OFDMA (MG-FH OFDMA) based on the statistical multiplexing is proposed for the downlink cellular system. Compared with the existed random frequency hopping OFDMA (RFH-OFDMA) system utilizing the statistical
Su, Xinghui   +9 more
core   +1 more source

Bit error simulation of DQPSK for a slow frequency hopping CDMA system in mobile radio communications [PDF]

open access: yes, 1995
Spread spectrum (SS) techniques seem to be an attractive alternative to conventional narrow-band modulation. In this paper a frequency hopping (FH) system model based on slow FH (SFH) is proposed.
Mortazavi, SH   +3 more
core   +1 more source

Noncoherent Multi-Way Relay Based on Fast Frequency-Hopping M-ary Frequency-Shift Keying [PDF]

open access: yes, 2010
Information exchange among a group of users is implemented with the aid of fast frequency-hopping $M$-ary frequency-shift keying multi-way relay (FFH/MFSK MWR). The FFH/MFSK MWR scheme uses two time-slots per symbol for achieving the information exchange,
Cao, Jianfei   +2 more
core   +2 more sources

Low-Hit-Zone Frequency/Time Hopping Sequence Sets With Large Family Size

open access: yesIEEE Access, 2019
For a quasi-synchronous frequency/time hopping (FH/TH) code-division multiple-access (CDMA) system which involves many users, the low-hit-zone (LHZ) FH/TH sequence set with large family size is necessary.
Xing Liu, Qin Shu, Qi Zeng
doaj   +1 more source

Frequency Hopping Sequences With Optimal Partial Hamming Correlation [PDF]

open access: yesIEEE Transactions on Information Theory, 2016
16 pages.
Jingjun Bao, Lijun Ji
openaire   +3 more sources

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