CAP is compared with 2B1Q coding based on the analysis of high bit rate digital subscriber line (HDSL). Some real examples are given which show the applications of HDSL technique.

• 在分析HDSL原理和性能的基础上，对其CAP（无载波调幅/调相）与2B1Q编码进行了分析比较，并结合实例给出了HDSL技术的实际应用。