Code division multiplex system using selectable length spreading code
sequences
    10.
    发明授权
    Code division multiplex system using selectable length spreading code sequences 失效
    码分多址系统使用可选长度扩展码序列

    公开(公告)号:US4930140A

    公开(公告)日:1990-05-29

    申请号:US297412

    申请日:1989-01-13

    IPC分类号: H04J13/16

    CPC分类号: H04J13/16

    摘要: A code division multiplex system for use in a spread spectrum communication system utilizes selectable length spread spectrum spreading code sequences. At the encoder, one of a pluraluty of a spread spectrum spreading code sequences having a given fixed length is selected for differential encoding in accordance with the input data to be transmitted. At the receiver correlator, a selectable length differential decoder is set to be responsive to a spread spectrum spreading code sequence having a length substantially equal to the length of the encoded spread spectrum spreading code sequence.