| 摘要 |
In a multicarrier transmission system, a transmitter (T, T') sends digital data packets (D) modulated on a set of carriers to a receiver (R, R'). A subset of the carriers constituting the set of carriers has frequencies (f1, f2, f3, f4) in predetermined frequency ranges (Amateur Radio Band) with high risk for being affected by narrowbanded interference (RFI), e.g. originating from radio amateur transmission. The data bits of the digital data packets (D) that are allocated to the subset of carriers having frequencies (f1, f2, f3, f4) within these predetermined frequency ranges (Amateur Radio Band), are allocated thereto in a redundant way. Via an allocation message (AM) communicated between the transmitter (T, T') and the receiver (R, R') both are aware of the redundancy in the bit allocations. The receiver (R, R') is capable of measuring the amount of narrowbanded interference (RFI) that affects each carrier within the subset of carriers that may be affected thereby, and can re-combine data bits allocated to carriers in this subset which carry redundant data bits so that interference immunity is improved. <IMAGE> <IMAGE> |
