摘要
采用预编码技术,提出了一种在频率选择性衰落信道中使用空时分组码的实现方案:预编码STBC-OFDM系统,并进一步分析了其最小距离球界的符号差错性能.研究结果表明,在频率选择性衰落信道中,这种预编码系统极大限度地利用了系统中所有可用的分集资源,而复杂度变化不大,可获得的最大分集好处为:发送天线数与接收天线数以及可分离的多条路径数目的乘积.
Using redundant pre-coding, a novel method, pre-coding STBC-OFDM system, combining the space-time block codes and OFDM smoothly in frequency selective fading channel is proposed. In addition, the minimum distance sphere up-bound of this system is also obtained. Results show that the attractiveness of this pre-coding STBC-OFDM system in frequency selective channel is in its ability to exploit all the available diversity resources. In other words, the highest possible diversity order this pre-coding STBC-OFDM system can provide is the product of the number of transmitter antennas, the number of receiver antennas and the number of selective fading diversity order.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2004年第1期45-49,共5页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(90104018
60172052)
国家"863计划"项目(2001AA123016)
关键词
OFDM
空时分组编码
预编码
分集技术
正交频分复用
无线通信
Block codes
Communication channels (information theory)
Encoding (symbols)
Fading (radio)
Performance
Signal to noise ratio
