基于广义正交跳频序列的QS-FHMA系统性能及其理论界研究

Generalized orthogonal frequency-hopping (GO-FH) sequence has lots of merits, such as lower hit-rate, larger system capacity and so forth. A QS-FHMA system employing with GO-FH sequence could efficiently mitigate multi-access interference (MAI) and accommodate larger number of mobile users in the next cellular uplink. Firstly, the project will explore the inherent relations among periodic Hamming correlation, partial Hamming correlation, average Hamming correlation, and MAI, bit-error-rate(BER) of QS-FHMA system, and study an efficient method of system performance analysis based on the Hamming correlation theory. Then, as to QS-FHMA system with GO-FH sequence (GO-QS-FHMA), the MAI model and the theoretical BER expressions for fast/slow FH scenarios are presented, and BER bounds on GO-QS-FHMA system are derived via periodic/partial Hamming correlation bounds on GO-FH sequence. Research in this project solves the key technical problems for QS-FHMA system performance via the method of Hamming correlation theory, and reveals the optimal performance relations among anti-MAI, system capacity, spectral efficiency and BER, which can provide the theoretical guideline for the design of GO-FH sequence and the implement of QS-FHMA system in the next generation cellular.

广义正交跳频序列具有频点碰撞概率低、序列数量多等优点。基于广义正交跳频序列的准同步跳频多址接入系统（QS-FHMA）可有效消除蜂窝通信上行链路中的多用户干扰（MAI），并提供较大的系统容量，具有广泛的应用前景。本课题探索伪随机跳频序列周期汉明相关函数、部分汉明相关函数和平均汉明相关值与QS-FHMA系统MAI、误码率的内在联系，建立基于序列汉明相关理论的系统性能分析方法。针对基于广义正交跳频序列的QS-FHMA系统，建立快、慢跳频方式下的MAI数学模型和误码率理论表达式，推导基于广义正交跳频序列周期/部分汉明相关理论界的系统性能界。通过上述研究，解决基于伪随机跳频序列汉明相关理论分析QS-FHMA系统性能的关键技术问题，揭示QS-FHMA系统的抑制MAI、系统容量、频谱效率和误码率等性能之间的最优化关系，为广义正交跳频序列设计及QS-FHMA系统在下一代蜂窝通信中的应用提供理论指导。

以无碰撞区/低碰撞区跳频（NHZ/LHZ）为代表的广义正交跳频序列具有频点碰撞概率低、序列数量多等优点。基于广义正交跳频序列的跳频多址接入系统（FHMA）可有效消除多用户干扰（MAI），并提供较大的系统容量，具有广泛的应用前景。本课题探索新型广义正交跳频序列的理论界和构造方法，研究周期汉明相关函数和平均汉明相关函数与FHMA系统MAI、误码率的内在联系，建立基于跳频序列汉明相关理论的系统性能分析方法。在未来无线通信场景中，设计满足特定通信需求的新型广义正交跳频序列和跳频系统（如基于阵列接收的广义正交跳频系统，基于广义正交跳频的异构跳频网络，适用于大规模接入的广义正交跳频等）。通过上述研究，解决利用伪随机跳频序列汉明相关理论分析FHMA系统性能的关键技术问题，揭示广义正交FHMA系统的抑制MAI、系统性能、频谱利用率等性能之间的最优化关系。基于广义正交跳频技术，实现了空时频多维抗干扰、多级传输服务质量（QoS）、大规模随机接入等多种通信需求。本课题的研究及成果为广义正交跳频技术在下一代蜂窝通信和军事通信的应用提供理论指导。