摘要
本文就FH/DS混合式扩频通信系统多址干扰性能进行了分析,主要针对QPSK和OQPSK调制。给出了该系统的信号和系统模型。对具有相同跳频图案,不同直扩码地址的情况,采用高斯近似法对系统多址干扰性能进行分析,得出了系统在多址干扰和白高斯噪声条件下误码率的表达式。 当采用直扩码型为理想随机二进序列时,可以得到简单明晰的表达式。并与BPSK和DBPSK调制的同一系统作了比较。
This paper concerns with the performance analysis of FH/DS Spread-Spectrum Communication System (SSCS) with QPSK or OQPSK modulation in the presence of Multiple-Access Interference (MAI) and AWGNThe model of this system and involved signal form are given. Based on that the effect of multiple-access interference to FH/DS SSCS modulated with QPSK or OQPSK are discussed in detail. Further, with Gaussian approximation method and discrete aperiodic cross-correlation parameter the equations of error probability Pe at the receiver are obtained.The results obtained show that the performance of MAI for FH/DS SSCS mainly depends on SNR, the process gain of the system, the total number of users and the statistics of the used DS codes.If DS code used is ideal random binary sequence the approximation equation of the error probability with both QPSK and OQPSK modulation is same
出处
《通信学报》
EI
CSCD
北大核心
1991年第1期90-96,共7页
Journal on Communications
