摘要
提出了一种分组空时编码OFDM传输方案。发射端对发射天线进行分组,对于每个分组进行独立的空时编码,而利用不同用户的子载波选择矩阵相互正交进行分组干扰抑制,接收端对每一分组的空时码进行空时分组码的传统解码。在发射天线数较大时,该方案不但可以获得高于传统空时编码的频谱利用率和码速率,而且相对于其他文献中的分组干扰抑制方法,该方案只需用一个接收天线,降低了系统接收机设计的复杂度。仿真结果验证了这一方案的有效性。
An OFDM transmission scheme based on groping space-time coding is proposed. For the transmitter, the transmit antennas are divided into subgroups and each of them is encoded by individual space-time block code, the group interferences suppression is taken by means of mutual orthogonality between subcarrier selection matrixes of different users. For the receiver, the traditional decoding method for space-time block code is used for each subgroup. With a large number of transmitter antennas, the new method only need one receiver antenna, which greatly reduce the complexity of receiver related to that in [ 6 ] and [ 8 ] for group interferences suppression. Simulation results confirm the validity of the proposed method.
出处
《西安科技大学学报》
CAS
北大核心
2007年第3期431-434,484,共5页
Journal of Xi’an University of Science and Technology
