| In order to solve the "a household a meter" electrical energy parameter gathering problem, the centralism record system arises at the historic moment. Because of the bad anti-damping ability of electricity line carrier wave record system, it did not achieve the commercial promotion. The paper uses the non-traditional channel transmission technology and transmits by the electricity line. It designed the system, has completed the integration of the electrical energy table and the modem, and strengthened the information transmission reliability. It used the long code theory and the voltage over zero signal transmission technical design code transmitter, and has designed the new code scheme, enhanced the system capacity.This technology reduced the construction quantity, reduced the system construction cost, and enhanced the overall system movement reliability. Besides, the signal ling uses the CDMA technology, so its secrecy was extremely enhanced. |
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