卫星双向时间频率传递调制解调器研制进展

摘要

卫星双向时间比对调制解调器是卫星双向时间比对系统的核心设备,文章介绍了北京无线电计量测试研究所自主研发的卫星双向时间比对调制解调器( BIRMM modem)的研制情况,该设备具备1Mchip/s,2.5Mchip/s,5Mchip/s三种码速率,最多可拓展10个通道,中频输出频率70MHz。通过本地上星比对试验对BIR-MM modem的核心性能指标进行了分析及评估。测试结果表明：BIRMM modem的时间比对精度优于0.3ns。%The modem is the key equipment in two-way satellite time transfer ( TWSTT) . In this pa-per,the new progress of BIRMM TWSTFT modem is introduced. The modem has flexible configuration with multi chip-rate such as 1Mchip/s,2. 5Mchip/s and 5Mchip/s and the receiver could expand to 10 channels in one module,the IF frequency is 70MHz. Referring to the test of local two-way satellite com-parison,the BIRMM modem performance has been analyzed and evaluated. The test results show that,the precision of BIRMM modem within 0. 3 ns.