| 摘要 |
Method, transmitter and receiver for spread spectrum digital communication by Golay complementary sequence modulation. The frequency spectrum of a transmission system is broadened in the transmitter (1) by means of encoding the information bits by means of pairs of Golay complementary sequences. The spectrum is received in the receiver (2) where it is passed through a filter adapted to the characteristics of said sequences, which makes it possible to detect digital levels corresponding to the original transmitted information. If eta orthogonal sequence pairs, A amplitudes to modulate the data and N-PSK modulation is used, it is possible to obtain a transmission rate (C) of: <DF>C= 1/2 . eta . log2A . log2N . (B/2) bits/sec. </DF> Where B is the broadened null-to-null bandwidth used in Hertz. It makes it possible to improve quality compared to other digital communication systems using spread spectrum technologies and CDMA, obtaining a processing gain independent of the transmission rate. <IMAGE>
|
