计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (34): 159-161.

• 网络、通信与安全 • 上一篇    下一篇

基于复合星座的自适应OFDM系统

王永学,叶礼兵   

  1. 深圳职业技术学院 电信学院,广东 深圳 510855
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-12-01 发布日期:2007-12-01
  • 通讯作者: 王永学

Adaptive OFDM system based on embedded constellations

WANG Yong-xue,YE Li-bing   

  1. Communication College,Shenzhen Polytechnic,Shenzhen,Guangdong 510855,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-12-01 Published:2007-12-01
  • Contact: WANG Yong-xue

摘要: 在多用户正交频分复用(OFDM)系统中,提出了一种基于复合星座的自适应子载波和比特分配算法。为了尽量减少系统的发射功率,该算法消除了许多研究中每个子载波只能被一个用户占用的限制,以较小的计算复杂度下获得了较高的性能。

关键词: 复合星座, 自适应, 正交频分复用, 子载波

Abstract: An embedded-constellation based subcarrier and bit allocation algorithm is proposed for multiuser OFDM systems.To minimize the transmit power,the proposed algorithm eliminates the restriction that a subcarrier cannot share by different users in most studies.It can achieve high performance with low compute complexity.

Key words: embedded constellation, adaptive, OFDM, subcarrier