航天员下行话音噪声问题的分析及解决方法

A Solution to Noise in Downlink Astronaut Voice

"神舟七号"载人航天任务对天地话音提出了很高要求。中心A与正样飞船联试时,接收到的飞船下行航天员选优话音(含USB、VHF话音)送入指控大厅扩声后含混不清。本文描述了2类下行话音传输、测试情况,研究了2类下行话音质量不好的原因,提出了问题解决方法,并通过实际测试与比较,给出了航天员下行话音送入扩声系统的方案。

Voice communication between space and ground is a key part of Shenzhou 7 manned space mission.It was discovered during intercommunication tests that the downlink selective voice including USB and VHF received by Control Center-A Hall Loudspeaker was unclear.Following discussions on transfer and tests of two types of voices,this paper analyzes the reasons of unclear voice.Solutions to the problem are proposed.Finally,a design for routing of downlink selective voice into the Hall Loudspeaker System is given based on actual tests and comparisons.