CAJ | 학술논문

直接序列扩频系统中，扩频序列的选择是个关键问题。扩频序列性能的好坏，直接关系到直接扩频通信系统整体性能的优劣，如抗干扰、抗衰落、同步与跟踪等性能。由于复合序列具有更高的复杂性和抗干扰能力，现已逐步代替传统的扩频序列。为此，提出一种混沌序列与Walsh序列相复合的复合序列，并对复合序列的抗干扰性能、子序列对复合序列性能的影响进行分析，仿真结果表明新的复合序列较传统序列有更强的抗干扰能力，且该复合序列的抗干扰性能不受子序列初始值影响，具有很高的应用价值。
직접서렬확빈계통중，확빈서렬적선택시개관건문제。확빈서렬성능적호배，직접관계도직접확빈통신계통정체성능적우렬，여항간우、항쇠락、동보여근종등성능。유우복합서렬구유경고적복잡성화항간우능력，현이축보대체전통적확빈서렬。위차，제출일충혼돈서렬여Walsh서렬상복합적복합서렬，병대복합서렬적항간우성능、자서렬대복합서렬성능적영향진행분석，방진결과표명신적복합서렬교전통서렬유경강적항간우능력，차해복합서렬적항간우성능불수자서렬초시치영향，구유흔고적응용개치。
The choice of spread spectrum sequence is a key issue in the direct sequence spread spectrum (DSSS) system. The performance of spread spectrum sequence is directly related to the overall performance of a DSSS system, such as anti-jamming, anti-fading, synchronization and tracking performance. Because of better complexity and anti-jamming capability, the composite spread spectrum sequences have been gradually replacing the traditional spread spectrum sequences. A new composite spread spectrum sequence was proposed based on the chaotic sequence and Walsh sequence. The anti-jamming capability of the proposed sequence and the effect of sub-sequence were analyzed. The simulation results showed that the new composite spread spectrum sequence has better anti-jamming ability than traditional spread spectrum sequences and its anti-jamming ability was hardly affected by the initial value of sub sequences. It has highly value in application.