中国邮电高校学报(英文) ›› 2011, Vol. 18 ›› Issue (1): 36-41.doi: 10.1016/S1005-8885(10)60025-8

• Wireless • 上一篇    下一篇

Flexible paired-orthogonal codes for multi-user MIMO-OFDM

王亚琛1,樊燕红2,马晓凤1,李晔2   

  1. 1. 山东省计算中心
    2. 山东省科学院
  • 收稿日期:2010-05-07 修回日期:2010-11-04 出版日期:2011-02-28 发布日期:2011-02-28
  • 通讯作者: 王亚琛 E-mail:wangych@keylab.net

Flexible paired-orthogonal codes for multi-user MIMO-OFDM

  • Received:2010-05-07 Revised:2010-11-04 Online:2011-02-28 Published:2011-02-28
  • Contact: Yachen WANG E-mail:wangych@keylab.net

摘要:

The work proposes two novel spreading codes, called extensive double-orthogonal code (EDOC) and flexible paired-orthogonal code (FPOC), for multi-user downlink multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The goal of code designs is to obtain an improved bit error rate (BER) performance without loss of bandwidth efficiency. The code designs achieve space diversity by employing multiple antennas at both transmit ends and receive ends. Codes are reasonably spread into time, frequency and space domain. The proposed codes are attractively characterized with length flexibility, which breaks the “power of two” constraint. The simulation results indicate that the proposed codes improve overall BER performance, by exploiting space diversity gains. The flexibility in code length also results in high spectral efficiency.

关键词:

flexible paired-orthogonality, MIMO, OFDM, multi-user, space diversity

Abstract:

The work proposes two novel spreading codes, called extensive double-orthogonal code (EDOC) and flexible paired-orthogonal code (FPOC), for multi-user downlink multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The goal of code designs is to obtain an improved bit error rate (BER) performance without loss of bandwidth efficiency. The code designs achieve space diversity by employing multiple antennas at both transmit ends and receive ends. Codes are reasonably spread into time, frequency and space domain. The proposed codes are attractively characterized with length flexibility, which breaks the “power of two” constraint. The simulation results indicate that the proposed codes improve overall BER performance, by exploiting space diversity gains. The flexibility in code length also results in high spectral efficiency.

Key words:

flexible paired-orthogonality, MIMO, OFDM, multi-user, space diversity