On the Practical Aspects of Joint Passive Phase Conjugation and Equalization Underwater Communication Systems
محل انتشار: دوفصلنامه مهندسی مخابرات، دوره: 2، شماره: 4
سال انتشار: 1392
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 303
فایل این مقاله در 14 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JCESH-2-4_004
تاریخ نمایه سازی: 22 مهر 1398
چکیده مقاله:
Underwater acoustic communication systems suffer from the channel impairments which results in time spreading of the transmitted signal. In underwater environment, multiple replicas of the transmitted signal are received at the receiver through different paths, which causes significant Inter-Symbol Interference (ISI). Decision Feedback Equalizers (DFE) was utilized to overcome this type of interference in digital communications so many years ago. However, because of the complexity of adaptive equalizers, Passive Phase Conjugation (PPC) was widely exploited in underwater communications in the recent years. Because of the poor performance of the PPC method, adaptive equalizers are jointed to improve the PPC performance. In this paper, experimental results conducted in Shiraz Electronic Industrys pool have been reported. Three different approaches are compared in terms of Symbol Error Rate (SER) versus the number of used channels at the pool: 1) the PPC method 2) DFE equalizer for only a single channel 3) the PPC method combined with the adaptive DFE. The experimental results showed that the third approach outperforms the others while a simpler receiver can be obtained.
کلیدواژه ها:
نویسندگان
Azizollah Jamshidi
Shiraz University