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Some specified chips in traditional Manchester-Ⅱencoding/decoding designs are used to guarantee strictly the stability of the input wave,otherwise the capacity of anti-interference and resilience are degraded seriously.In this paper,a new Manchester-Ⅱencoding/ decoding system is used for nuclear logging by a 7 000 m armoring cable.A thorough hardware wave tracking decoding algorithm is proposed and realized in a FPGA hardware chip.An on-site measurements show that this transmission system can decode correctly in real time,with a bit error rate of better than 10~(-10).
Some specified chips in traditional Manchester-Ⅱ encoding / decoding designs are used to guarantee strictly the stability of the input wave, otherwise the capacity of anti-interference and resilience are degraded seriously. In this paper, a new Manchester-Ⅱ encoding / decoding system is used for nuclear logging by a 7 000 m armoring cable. A thorough hardware wave tracking decoding algorithm is proposed and realized in a FPGA hardware chip. On-site measurements show that this transmission system can decode correctly in real time, with a bit error rate of better than 10 ~ (-10).