Results 11 to 20 of about 9,046,388 (244)

Optimal Constructions of Low-Hit Zone Frequency-Hopping Sequence Set Based on m-Sequence

Mathematics
Quasi-Synchronous Frequency hopping (FH) Multiple Access (QS-FHMA) systems feature high communication efficiency, strong flexibility, and low operational costs, and they have been widely used in various FH communication scenarios such as satellite ...
Changyuan Wang, Yi Zhang, Wanan Yang, Chunhua Ren   +3 more
doaj   +2 more sources

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

, 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]

, 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, Lv, Tiejun, Yang, Shaoshi, Yun, Xiang, Xiang Yun, Shaoshi Yang, Gong, Ping, Xinghui Su, Ping Gong, Tiejun Lv   +9 more
core   +1 more source

Three new classes of optimal frequency-hopping sequence sets [PDF]

Designs, Codes and Cryptography, 2016
The study of frequency-hopping sequences (FHSs) has been focused on the establishment of theoretical bounds for the parameters of FHSs as well as on the construction of optimal FHSs with respect to the bounds. Peng and Fan (2004) derived two lower bounds on the maximum nontrivial Hamming correlation of an FHS set, which is an important indicator in ...
Bocong Chen, Liren Lin, San Ling, Hongwei Liu 0003   +3 more
openaire   +4 more sources

A New Set of Optimal Frequency-Hopping Sequences

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2010
In frequency-hopping (FH) multiple access systems, frequency-hopping sequences (FHSs) with optimal Hamming correlation properties are needed. Based on the d-form functions with ideal autocorrelation properties, a new set of FHSs is constructed. The new FHS set is optimal with respect to the Peng-Fan bounds and each FHS in the set is optimal with ...
LIU, Fang, PENG, Daiyuan, TANG, Xiaohu
openaire   +2 more sources

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

, 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, Jones, JA, McGeehan, JP, Beach, MA   +3 more
core   +1 more source

New construction method of periodic quasi-complementary sequence set

Tongxin xuebao, 2023
To solve the problem that the number of sequences in the complete complementary sequence set is limited, periodic quasi-complementary sequence set was constructed.Firstly, based on the circular Florentine array, the near optimal periodic quasi ...
Xiaoyu CHEN, Chengrui WANG, Fan LIU
doaj   +2 more sources

Self-Organizing Hit Avoidance in Distributed Frequency Hopping Multiple Access Networks

IEEE Access, 2017
In this paper, we investigate the frequency hit avoidance problem in distributed frequency hopping multiple access (FHMA) networks, in which each user intends to avoid the frequency hit with others by choosing the appropriate frequency set and frequency ...
Long Yu, Yuhua Xu, Qihui Wu, Luliang Jia
doaj   +1 more source

Recursive construction of optimal frequency‐hopping sequence sets

IET Communications, 2016
In this study, first the authors present a simplified representation of the Peng–Fan bounds on the periodic Hamming correlation of frequency‐hopping sequence (FHS) sets, which may also be used to check the optimality of an FHS set with respect to the Peng–Fan bounds.
Shanding Xu, Xiwang Cao, Guangkui Xu
openaire   +1 more source

Two constructions of low-hit-zone frequency-hopping sequence sets

Advances in Mathematics of Communications, 2022
<p style='text-indent:20px;'>In this paper, we present two constructions of low-hit-zone frequen-cy-hopping sequence (LHZ FHS) sets. The constructions in this paper generalize the previous constructions based on <inline-formula><tex-math id="M1">\begin{document}$ m $\end{document}</tex-math></inline-formula>-sequences and &
Wenjuan Yin, Can Xiang, Fang-Wei Fu 0001
openaire   +3 more sources