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No-hit-zone frequency-hopping sequence (NHZ-FHS) is a core element for quasi-synchronous frequency-hopping multiple access (QS-FHMA) systems. In this paper we construct new optimal NHZ-FHS sets with respect to the bound by Ye and Fan by interleaving techniques.We first give three constructions for optimal NHZ-FHS sets of length 2N for any positive integer N ?? 3 according to whether the size of NHZ...
Sequence families with zero or low correlation zone can be used in the quasi-synchronous code-division multiple-access (QS-CDMA) communication systems. Interleaving techniques are very useful for sequence design. In this paper, we present a general construction of sequence families with zero or low correlation zone using interleaving techniques and complex Hadamard matrices. The component sequences...
Construction programme, which internal and external environment is complicated, is a group composed of numerous interrelated projects, thus the uncertainty of risk is more evident. In order to ascertain the integrity and the certainty of information relatively, which lead to more scientific and the advisable evaluation, the programme is divided into subgroups in paper first. Then an analysis of the...
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