| 摘要 |
PURPOSE:To provide a digital transmission system with high power efficiency and profitability by comparing the symbol of a dedicated subcarrier by arranging in a vector opposite to the synthetic vector of the subcarrier of another symbol. CONSTITUTION:Symbol synthesis is applied to the information symbols (SO, S8, Sa or S4, Sc, Se) of received subcarriers 1-5 at a reception side similarly as at a transmission side. When coincidence between the information symbol (S2 or S6) nearest to the symbol {-(S0+S8+Sa) or -(S4+Sc+Se)} symmetric to the synthetic symbol in spatial fashion and a reception symbol (S2 or S6) received by the subcarrier (m) for power control is obtained, it is decided that all the information symbols of received subcarriers are correct. When noncoincidence is obtained, it is decided that an error exists in the information symbol of the subcarrier, and the communication of correct data is performed by a means such as re-transmission, etc. |
