【摘 要】
：
在频率选择性衰落环境下,作为一种有效的传输分集体制,空频 正交频分复用(spacefrequency orthogonalfrequencydivisionmultiplexing,SF OFDM)技术得到了广泛的关注。但是这
【机 构】
：
西安电子科技大学ISN国家重点实验室,西安电子科技大学ISN国家重点实验室,西安电子科技大学ISN国家重点实验室 陕西西安710071 ,陕西西安710071 ,陕西西安710071
论文部分内容阅读
在频率选择性衰落环境下,作为一种有效的传输分集体制,空频 正交频分复用(spacefrequency orthogonalfrequencydivisionmultiplexing,SF OFDM)技术得到了广泛的关注。但是这种方法通常是在假定系统的循环前缀长度大于信道时延扩展的前提下应用的,而循环前缀的使用却大大降低了系统的传输效率,如果能压缩甚至去掉循环前缀,而保持系统性能不变,则是很有意义的。为此给出一种新的SF OFDM解调方式,利用循环重构抵消手段减少甚至去掉了循环前缀。最后通过计算机模拟,证实了这种解调方式的有效性。
In frequency selective fading environment, as an effective transmission diversity system, space frequency orthogonal frequency division multiplexing (space OFDM orthogonal frequency division multiplexing, SF OFDM) technology has received widespread attention. However, this method is usually applied assuming that the system’s cyclic prefix length is longer than the channel delay extension. However, the use of cyclic prefix greatly reduces the transmission efficiency of the system. If the cyclic prefix is compressed or even removed, the system performance is maintained The same, it makes sense. To this end, a new SF OFDM demodulation method is given, which uses the cyclic reconfiguration offsetting method to reduce or even eliminate the cyclic prefix. Finally, through computer simulation, confirmed the effectiveness of this demodulation method.
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