Downlink Transmission of Broadband OFCDM Systems-Part V: Code Assignment

  title={Downlink Transmission of Broadband OFCDM Systems-Part V: Code Assignment},
  author={Yiqing Zhou and Jiangzhou Wang and Tung-Sang Ng},
  journal={IEEE Transactions on Wireless Communications},
To provide high speed mobile services, orthogonal multi-code transmission is employed in the orthogonal frequency and code division multiplexing (OFCDM) system. However, in a wireless frequency selective channel either with or without Doppler shift, code orthogonality is distorted and multi-code interference (MCI) is caused. The variance of the MCI is dependent on which codes to be used. This paper investigates the code assignment in the OFCDM system, aiming to mitigate the MCI. The code… CONTINUE READING
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