Several Families of Sequences with Low Correlation and Large Linear Span

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概要

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• In DS-CDMA systems and DS-UWB radios, low correlation of spreading sequences can greatly help to minimize multiple access interference (MAI) and large linear span of spreading sequences can reduce their predictability. In this letter, new sequence sets with low correlation and large linear span are proposed. Based on the construction Trm1[Trnm(αbt+γiαdt)]r for generating p-ary sequences of period pn-1, where n=2m, d=upm±v, b=u±v, γi∈GF(pn), and p is an arbitrary prime number, several methods to choose the parameter d are provided. The obtained sequences with family size pn are of four-valued, five-valued, six-valued or seven-valued correlation and the maximum nontrivial correlation value is (u+v-1)pm-1. The simulation by a computer shows that the linear span of the new sequences is larger than that of the sequences with Niho-type and Welch-type decimations, and similar to that of [10].

• （社）電子情報通信学会の論文
• 2008-08-01

著者

• Zhang Zhenyu

  Department Of Communication Engineering Chongqing University

• Zeng Fanxin

  Department Of Information Engineering Chongqing Communication Institute

関連論文

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• New Perfect Polyphase Sequences and Mutually Orthogonal ZCZ Polyphase Sequence Sets
• New Sequences with Low Correlation and Large Family Size
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