The E-TDMA-based GMH2000 fixed radio system developed by Hughes Network Systems (HNS) provides an effective local radioloop solution for the public telephone service.
The orthogonal analog phase lock loop is used to get the timing information of the impulse radio system and the multi-path component separation.
使用正交模拟锁相环路对无载波的脉冲无线电系统实现多径捕获和同步提取。
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Medium frequencies and horizontal magnetic dipoles (vertical loop antennas) can be used in underground radio communication in mining sections of coal mines.