Optimal spreading sequence design based on PR-QMF theory

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Optimal spreading sequence design based on PR-QMF theory

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Based on filter bank theory, a new scheme for spreading sequence generation is proposed for direct sequence code division multiple access (DS-CDMA) systems. It is shown that optimal spreading sequences produce much less multiple access interference (MAI) than Gold codes with comparable lengths.

Inspec keywords: code division multiple access; spread spectrum communication; quadrature mirror filters; interference (signal); filtering theory

Other keywords: mobile communications; multiple access interference; filter bank theory; PR-QMF theory; optimal spreading sequence design; direct sequence code division multiple access

Subjects: Multiple access communication; Electromagnetic compatibility and interference; Filtering methods in signal processing

References

    1. 1)
      • A.N. Akansu , M.V. Tazebay , R.A. Haddad . A new look at digital orthogonal transmultiplexers for CDMA communications. IEEE Trans. , 1 , 263 - 267
    2. 2)
      • M.B. Pursley . Performance evaluation for phased-coded spread-spectrum multiple-accesscommunication-Part I. IEEE Trans. , 8 , 795 - 799
    3. 3)
      • P.P. Vaidyanathan , P. Hoang . Lattice structures for optimal design and robust implementation of two-channelperfect-reconstruction QMF banks. IEEE Trans. , 1 , 81 - 94
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19990328
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