The technologies such as pre-code, relative code, QAM modulation, match-balancedamplifying receiving and synchronous demodulation, etc. are studied and applied, then the datatransmitting rate of 640 Kbit/s of the telemetry sub is realized.

• 研究并应用了预编码、相关编码、QAM调制、匹配均衡放大接收及同步解调等技术,实现了遥测短接640Kbit/s的数传速率。