Acta Metallurgica Sinica(English letters) ›› 2011, Vol. 18 ›› Issue (6): 44-50.doi: 10.1016/S1005-8885(10)60121-5

• Wireless • 上一篇    下一篇

New design of single-symbol decodable STBCs for MIMO communication system

Pham Van Bien1,祁博宇1,2,盛卫星1,马晓峰1,王昊1   

  1. Department of Communication Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • 收稿日期:2011-04-01 修回日期:2011-09-03 出版日期:2011-12-31 发布日期:2011-12-30
  • 通讯作者: 盛卫星 E-mail:shengwx@mail.njust.edu.cn

New design of single-symbol decodable STBCs for MIMO communication system

  1. Department of Communication Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2011-04-01 Revised:2011-09-03 Online:2011-12-31 Published:2011-12-30
  • Contact: Weixing Sheng E-mail:shengwx@mail.njust.edu.cn

摘要:

Single-symbol maximum-likelihood (ML) decodable space-time block codes (SSDCs) can achieve a maximal symbol rate of 6/7 for multiple-input multiple-output (MIMO) communication system with five or six transmit antennas by using rate-efficient generalized coordinate interleaved orthogonal designs (RE-GCIODs). Unfortunately, there are many zero entries in the codeword matrix of RE-GCIODs. The zero entries result in high peak-to-average power ratio (PAPR) and also impose a severe constraint on hardware implementation. In this paper, for MIMO communication systems with five or six transmit antennas and one receive antenna, a new SSDC is proposed. By combining Alamouti code and orthogonal space-time block code (OSTBC), desirable properties like RE-GCIODs can be achieved and are derived, including maximal symbol rate up to 6/7, full diversity and single-symbol ML decodability. Moreover, by reducing the number of zero entries in the codeword matrix, the peak-to-average power ratio (PAPR) of our proposed code is lower than RE-GCIODs. Simulation results show that the proposed codes outperform RE-GCIODs under peak power constraint while performing almost same under average power constraint.

关键词:

space-time block code (STBC), full diversity, MIMO, PAPR

Abstract:

Single-symbol maximum-likelihood (ML) decodable space-time block codes (SSDCs) can achieve a maximal symbol rate of 6/7 for multiple-input multiple-output (MIMO) communication system with five or six transmit antennas by using rate-efficient generalized coordinate interleaved orthogonal designs (RE-GCIODs). Unfortunately, there are many zero entries in the codeword matrix of RE-GCIODs. The zero entries result in high peak-to-average power ratio (PAPR) and also impose a severe constraint on hardware implementation. In this paper, for MIMO communication systems with five or six transmit antennas and one receive antenna, a new SSDC is proposed. By combining Alamouti code and orthogonal space-time block code (OSTBC), desirable properties like RE-GCIODs can be achieved and are derived, including maximal symbol rate up to 6/7, full diversity and single-symbol ML decodability. Moreover, by reducing the number of zero entries in the codeword matrix, the peak-to-average power ratio (PAPR) of our proposed code is lower than RE-GCIODs. Simulation results show that the proposed codes outperform RE-GCIODs under peak power constraint while performing almost same under average power constraint.

Key words:

space-time block code (STBC), full diversity, MIMO, PAPR