| 摘要 |
Proposed are a constant envelope multiplexing signal generation method, generation device, receiving method and receiving device for double-frequency four-component spread spectrum signals. According to the method, four baseband spread spectrum signals s1(t), s2(t), s3(t) and s4(t) can be respectively modulated onto two frequency points f1 and f2, so as to generate a constant envelope multiplexing signal at a radio-frequency carrier frequency of fp=(f1+f2)/2, wherein s1(t) and s2(t) are modulated onto f1 and the carrier phases thereof are orthogonal to each other, and s3(t) and s4(t) are modulated onto f2 and the carrier phases thereof are orthogonal to each other, where f1 is greater than f2. The method comprises: determining the ratio of powers to be allocated for four baseband spread spectrum signals s1(t), s2(t), s3(t) and s4(t) in a constant envelope multiplexing signal; storing an additional phase lookup table, the additional phase lookup table comprising additional phases of a same-phase baseband component I(t) and an orthogonal baseband component Q(t) of the constant envelop multiplexing signal; querying the additional phase lookup table, so as to obtain an additional phase ? of a time period to which the current moment belongs; and according to the obtained additional phase ?, generating the same-phase baseband component I(t) and the orthogonal baseband component Q(t) of the constant envelope multiplexing signal, and generating a multiplexing signal SRF(t) having a constant envelope. |
