| 摘要 |
A radio communications system includes a transmitter and a receiver. The transmitter generates or receives digital symbols having a given symbol rate associated with a corresponding symbol period; and generates, every S digital symbols generated/received (S>3), a respective multi-mode digital signal, which has a predefined time length shorter than S times the symbol period, which is sampled with a predefined sampling rate higher than the symbol rate, and which carries the S digital symbols by a plurality of orthogonal harmonic modes including a main mode which is a real harmonic mode and carries P of the S digital symbols (P<S). The receiver receives and processes the radio frequency signal to obtain a corresponding incoming digital signal; and extracts, from successive, non-overlapped portions of the incoming digital signal sampled with the predefined sampling rate, the S digital symbols respectively carried by each incoming digital signal portion by the orthogonal harmonic modes. |
