| 摘要 |
PROBLEM TO BE SOLVED: To apply revision control to setting of a pattern of a frequency hopping in response to the environment of a transmission channel with respect to spread spectrum communication of a frequency hopping system. SOLUTION: Transmission section side and reception section side hopping pattern generators 14, 19 are set variably to different hopping patterns. Moreover, the reception section side is provided with a comparison detection section 24 that compares data Ds from a data recovery section 21 with data Dc coded by using an error correction code based on decoded data Do and detects a carrier having a code error among carrier signals subject to hopping, a control section 28 controlling the hopping pattern generators 14, 19 that change a pattern not hopped to the carrier detected by the comparison detection section 24, a 1st memory section 16 storing a set hopping pattern and a 2nd memory section 25 storing hopping patterns of plural kinds. |
