摘要
根据OFDM系统子信道的相关性,为空频分组编码(SFBC)OFDM系统提出了一种简单的解码算法。该算法只需要少量的导频就可以估计信道并解码,当传输模式是QPSK时甚至无需信道估计。仿真结果表明:该算法与差分解码相似,虽然与相干解码比较有3 dB的性能损失,但是仍然能够得到分集增益,并且计算复杂度大大降低。
A simple decoding algorithm for SFBC-OFDM system was proposed on the basis of channel correlation in OFDM systems. The proposed algorithm only needs a few pilots to estimate channel and decode, and it requires no channel estimation when QPSK modulation was used. The simulation results demonstrate that the presented algorithm is similar to differential detection scheme, and has only 3 dB penalty when compared with coherent detection method, however, the diversity gain can be obtained and computation complexity is obviously reduced.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2007年第2期474-478,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金资助项目(60332030
60496316)
关键词
通信技术
空频分组编码
正交频分复用
发射分集
迭代解码
communication
space frequency block coding
orthogonal frequency division multiplexing
transmit diversity
iterative decoding
