在高速率准同步CDMA系统中，若使用传统P元序列集作为扩频地址码，误码率将随速率的提高而快速增大，并且传统单集序列集无法解决小区间用户的同频干扰问题。围绕上述尚待突破的问题，本项目研究高斯整数分组序列集的构造方法。首先，为保证序列集参数可以灵活选择，研究利用分组移位序列集构造具有组间零相关区的高斯整数分组序列集的方法。其次，基于完备序列集和交织方法，研究大容量高斯整数低相关区序列集的集间相关性。同时，研究高斯整数正交互补序列集的构造方法，进而利用级联法构造组间低相关高斯整数分组序列集。最后，建立高速率准同步CDMA系统模型，验证所构造的序列集在传输速率和抗干扰能力方面的优势。高斯整数序列可以实现高速率传输，利用分组序列集组间的低/零相关区或低相关性可以有效降低不同小区间用户的干扰。因此，高斯整数分组序列集的设计可以成为CDMA系统的一项关键技术，从而推动无线通信技术的发展。

In quasi-synchronous code-division multiple-access (CDMA) systems with high transmission data rate (TDR), the error rate will be increased with the improvement of TDR if the tranditional P-ary sequences are used. Furthermore, the inter-cell interference cannot be suppressed if traditional single sequence set is employed. On basis of the aforementioned unsolved issues, the constructions of Gaussian integer sequences with multiple groups are researched. Firstly, in order to construct the sequences with flexible choices of parameters, the constructions of Gaussian integer sequences with inter-group zero correlation zone based on shift sequences with multiple groups are studied. Secondly, perfect Gaussian integer sequence sets and the interleaving technique are employed to research the inter-group correlation characteristic of low correlation zone Gaussian integer sequences with large family size. Furthermore, study on the design of Gaussian integer orthogonal complementary sequences, and then cascade methods are employed to construct Gaussian integer sequence sets with good inter-group correlation properties. Finally, the project will establish a high TDR quasi-synchronous CDMA system model to verify the advantages of the proposed sequences in TDR and the abilities of suppressing the interference. Higher TDR can be achieved by using the sequences over Gaussian integer ring and the inter-cell interference can be suppressed by employing multiple sequence groups. Consequently, the design of Gaussian integer sequence sets with multiple groups, which can become a key technique in CDMA spread spectrum communication, is of great significance to the development of wireless communication techniques.