M-ary direct sequence spread spectrum communication method

An improved direct sequence spread spectrum communication method, comprising a spectrum spreading method and a spectrum de-spreading method executed on a processor, wherein said spectrum spreading method comprises the steps of:

• A1, labeling a single symbol as T, the symbol T is composed of t number of consecutive clock cycles;
• t is a natural number;
• A2, taking a direct sequence spreading code which is represented by M, M is composed of m number of symbols T, m is a natural number;
• A3, defining a data sequence M0M1M2 . . . MnMn+1 . . . ;
• n is a natural number;
• A4, encoding a source signal to form data k of K-ary;
• k is 0, 1, 2, . . . K−1;
• A5, inserting j number of symbol T into bit intervals of M0M1M2 . . . MnMn+1 . . . , where j=ƒ(k), where j is a natural number,
• 0
• ≤
• j
• <
• K
• +
• 1
• 2
• ,
• ƒ(x) is a monotonically increasing function in the range 0 to
• K
• +
• 1
• 2
• ,
• and the phase difference between Mn and Mn+1 is defined by ƒ(k);
• said spectrum de-spreading method comprises the steps of:
• B1, obtaining a direct sequence spreading code Mn;
• B2, obtaining a direct sequence spreading code of the subsequent section Mn+1;
• B3, determining the number j of the symbol T between intervals of the direct sequence spreading code Mn and the direct sequence spreading code of the subsequent section Mn+1;
• B4, calculating k according to an inverse function k=ƒ′(j) of j=ƒ(k)j.