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.
出处
《计算机工程》
CAS
CSCD
2012年第6期80-82,共3页
Computer Engineering
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
near space
excess delay
delay power distribution
coherence bandwidth
flat fading
frequency selective fading