基于复合序列的多进制正交扩频系统性能分析

Journal of Systems Engineering and Electronics ›› 2010, Vol. 32 ›› Issue (4): 703-706.

基于复合序列的多进制正交扩频系统性能分析

付江志¹，郭黎利¹，杨红乔²

（1. 哈尔滨工程大学信息与通信工程学院，黑龙江哈尔滨 150001；
2. 中国空间技术研究院卫星应用系统部，北京 100086）

出版日期:2010-04-23 发布日期:2010-01-03

Performances of M-ary orthogonal code spread spectrum system based on composite sequences

FU Jiang-zhi¹, GUO Li-li¹, YANG Hong-qiao²

(1. Coll. of Information and Communication Engineering, Harbin Engineering Univ., Harbin 150001, China;
2. Satellite Application System Dept., China Academy of Space Technology, Beijing 100086, China)

Online:2010-04-23 Published:2010-01-03

摘要/Abstract

摘要：

提出了一种可用于高速数据传输的多进制正交扩频系统的设计方法。该方法将复合序列与多进制正交扩频技术相结合，在原有多进制扩频系统规模的基础上可实现更高的传输效率，或者在信息速率一致的情况下大大降低系统结构。对在加性高斯白噪声(additive white Gaussian noise, AWGN)信道中的性能进行了仿真，结果说明，在系统结构相近的情况下，不仅传输效率提高了17%，而且在低误比特率时抗噪声性能提高0.1 dB；或者，在同样传送6 bit信息时，虽然系统的抗噪声性能在低误比特率时下降了1 dB，但复杂度仅为原来的25%。

Abstract:

This paper introduces a design method of M-ary orthogonal code spread spectrum system applied to high-speed data transmission. The method brings about a higher bits rate based on a primary framework or reduces greatly system sizes in the same bits rate comparing with the conventional M-ary orthogonal code spread spectrum system by combining composite sequences with M-ary orthogonal code spread spectrum technology. The performances of the system in an AWGN channel are simulated. Simulation results show that when the structures are similar, bits transmittable efficiency improves by 17% and the antinoise capability increases by 0.1 dB at low BER.On the other hand, when 6 bits are transferred, the antinoise capability decreases by 1 dB at low BER, but the system complexity reduces by 75% as compared with the original one.

付江志, 郭黎利, 杨红乔. 基于复合序列的多进制正交扩频系统性能分析[J]. Journal of Systems Engineering and Electronics, 2010, 32(4): 703-706.

FU Jiang-zhi, Guo Li-li, Yang Hong-qiao. Performances of M-ary orthogonal code spread spectrum system based on composite sequences[J]. Journal of Systems Engineering and Electronics, 2010, 32(4): 703-706.