Long-Distance Trunk Transmission Coverage

Existing 2G and 3G mobile communication systems high-frequency, space propagation loss, diffraction, weak, usually only the line of sight coverage. Hilly, mountainous, forest cover areas such shortcomings. Our compression and expansion system developed to support GSM, CDMA, WCDMA mobile communication system, capable of non line of sight coverage, using 150 ~ 230MHz frequency as a relay transmission frequency, the longest transmission distance can reach more than 20Km.