临近空间衰落信道建模及其性能分析  

Near Space Fading Channel Modeling and Its Performance Analysis

作　　者：林诚[1] 陈树新[1] 苏一栋[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077

出　　处：《计算机工程》2012年第6期80-82,共3页Computer Engineering

摘　　要：为实现对临近空间通信信道的有效描述,提出一种临近空间信道几何模型,通过估算多径信道的参数,建立相应的信道仿真模型。在正交相移键控调制方案下,对信道的相位特性和误码性能进行仿真分析,结果表明,该模型与实际情况相符。当传输速率过大时,信道性能恶化,需要做进一步均衡处理。In order to describe the near space communication channel efficiently, a simple near space channel geometric model is proposed. It estimates the parameters of the multipath channel, builds the corresponding channel simulation model, simulates and analyzes the phase and bit error ratio characteristics of the channel for the Quadrature Phase Shift Keying（QPSK） scheme, validates the correctness of the model. When the transmission rate is too high, the performance of the channel worsens and needs equalization in next step.

关 键 词：临近空间 过量延时 延时功率分布 相干带宽 平坦衰落 频率选择性衰落 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]