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近十年来,单路单载波(SCPC)卫星通信系统已经在部分国际和国内卫星通信业务中得到广泛应用。这种情况主要是由于调制技术和数字处理技术的发展,特别是音频编码、视频编码、数字前向纠错(FEC)编码和多址按需分配技术的发展促成的。这些技术利用有限的发射功率和带宽,为优质 SCPC传输系统提供了条件。SCPC 的发展同时还与廉价地面站设备的制造有关。这些地面站设备小巧,可靠,
In the past decade, single-channel single-carrier (SCPC) satellite communication systems have been widely used in some international and domestic satellite communications services. This is mainly due to the development of modulation techniques and digital processing techniques, especially the development of audio coding, video coding, digital forward error correction (FEC) coding and multiple access on demand allocation. These techniques exploit the limited transmit power and bandwidth, providing the conditions for a high quality SCPC transmission system. The development of SCPC is also linked to the manufacture of cheap ground station equipment. These ground station equipment is compact, reliable,