Designing Of A Spread-Spectrum Sequences Based On The Bridge Function-Restructed Research

The design of code sequences is an important topic in many engineering fields.With the fast development of the 3G and the 4G mobile communication technology,Code Division Multiple Access (CDMA) technology has become a mainstream.It's key features include:huge capacity, good anti-interference and anti-interception capability, etc. It deeply dependents on the spread-spectrum sequences design to enhance these advantages. As research demonstrates,the bridge function has a great prospect in the code sequences design.Based on the learning and designing of the Hybrid Bridge Function sequence,this paper make further study on sequence generating methods and optimal sequences designing.This paper proposes a new kind of sequence generating method.It's used to form a new ternary function sequence which is named as Restructed-Hybrid Bridge Function sequence.It analyzes the basic characters and the correlation characteristics of Restructed-Hybrid Bridge function sequence,and describes a design method as a kind of optimum spread-spectrum sequences designing with the new sequence.Further more, it also talks about some other sequence(s) generating methods and design methods based on the bridge functions. Specifically,this paper takes the following innovative contents:(1)Create Restructed-Hybrid Bridge Function sequence with the method of Restructed-Hybrid,which breaks through the regular distribution of zero elements in the Bridge Function sequence.It expands the scope of the spread-spectrum sequences'study.(2)Study some basic characters of Restructed-Hybrid Function matrix, including the pair wise orthogonal character of the row vectors and the group orthogonal characters of the column vectors, and give strict mathematical proves.Focus on correlation functions of Restructed-Hybrid Bridge Function sequences, and obtain some conclusions out through simulation.(3)Further elaborate the design methods of optimal Restructed-Hybrid Bridge Function sequences sets.For the characteristic parameters such as zero correlation zones (ZCZs),main-side lobe ratio and relative influence factor,raise a sequence design based on the generalized-similar Restructed-Hybrid Bridge Function sequences with the computer search algorithm, and give out a series of preferred sequence sets.(4)From new perspective, raise a generating method of optimal ZCZ Interwoven Bridge Function sequence and a reconstructing method of sequences family.Through taking analysis on simulation results of them,get two design methods of sequences family with good correlation characters. As manifested by experiments, the optimal ZCZ Interwoven Bridge Function sequence could apply to communication system.Through the research, this paper extends the generation thoughts of the Hybrid Bridge Function sequences.It not only improves the Bridge Function theory system,but also provides a broader research base on the code sequences design.And it makes it further possible that the Bridge Function theory is to be used in the field of wireless communication applications and other projects.