• A NEW ORTHOGONAL MULTIPLEX SYSTEM

      shan, Zhang Qi; Zhihua, Li; Beijing Institute of Aeronautics and Astronautics; Qinghua University (International Foundation for Telemetering, 1982-09)
      The basis of mathematics which can form a telemetering system is orthogonal functions. Three kinds of orthogonal functions are used up to now. First of them is sine and cosine functions. Second one is block pulse functions. The third one is walsh functions. Their corresponding systems are FDM, TDM and SDM. There are also other orthogonal sets which can form telemetering system, such as Legendre polynomials and Hermite polynomials. Hewever. They are too complex for engineering practice. Except these functions mentioned above, is there any other orthogonal functions which is suitable for engineering practice? In this paper we presented a new type of orthogonal functions. Its construction is similar to Walsh functions. The amplitudes of the functions are +1, -1 and 0. In the sence that they close the gap between walsh functions and block functions, it is called Bride functions. The definition and properties are discussed in more detail here. The construction of system is also similar to that of SDM.