یک روش کدینگ وفقی با استفاده از اطلاعات حالت کانال منبع-رله و کدهای همینگ، برای مصالحه بین توان و احتمال خطا در شبکه های حسگر بی سیم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، دانشکده مهندسی برق و الکترونیک، دانشگاه صنعتی شیراز

2 دانشجوی دکتری، واحد پردیس دانشگاه صنعتی شیراز

3 استادیار دانشکده مهندسی برق و الکترونیک دانشگاه صنعتی شیراز

4 دانشگاه صنعتی شیراز، استادیار، دانشکده مهندسی برق و الکترونیک

چکیده

شبکه های حسگر بی سیم، در نسل پنجم مخابرات سلولی مورد توجه ویژه ای قرار گرفته اند. یکی از عمده‌ترین چالش‌ها در این شبکه‌ها، محدودیت منابع انرژی است که به طور مستقیم طول عمر شبکه حسگر را تحت تأثیر قرار می‌دهد. در این مقاله یک روش کدینگ وفقی برای شبکه های حسگر ارایه میشود. بر خلاف کارهای گذشته، که در آنها کانال بی سیم بصورت محو شوندگی بلوکی در نظر گرفته شده است، یعنی ضریب محو شوندگی در طول ارسال یک بلوک داده تغییر نمیکند، ما تغییرات آرام زمانی را که کانال در طول ارسال یک بلوک تجربه میکند در نظر میگیریم و به طراحی کدینگ وفقی برای چنین سیستمی میپردازیم. الگوریتم ارایه شده بر اساس کدگشایی توأم است و هدف آن رسیدن به احتمال خطایی پایینتر از سطح آستانه مجاز، با انتخاب یک کدینگ وفقی است که کمترین انرژی مصرفی را دارد. نتایج شبیه سازی با استفاده از کدهای همینگ نشان میدهد که روش وفقی پیشنهادی در کاهش توان مصرفی نسبت به روش غیر وفقی موفق عمل میکند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

An Adaptive Coding Approach Using Source-Relay Channel State Information and Hamming Codes to Trade off Power and Error Probability in Wireless Sensor Networks

نویسندگان [English]

  • Samira Naderi 1
  • Zahra Zarei 2
  • Javad Haghighat 3
  • Mohsen Eslami 4
1 M. Sc., Faculty of Electrical Engineering, Shiraz University of Technology
2 Ph.D. Student, Pardis Section, Shiraz University of Technology
3 Assistant Professor, Faculty of Electrical Engineering, Shiraz University of Technology
4 Assistant Professor, Faculty of Electrical Engineering, Shiraz University of Technology
چکیده [English]

Wireless sensor networks have attracted a great deal of attention as one of the key enabling technologies for 5G cellular networks. One of the main challenges ahead of such networks is limitation of energy resources which directly affects their lifespan. In this paper, an adaptive coding technique for wireless sensor networks is presented. On the contrary to the previous studies which have considered block fading channels, where a constant fading factor is assumed during the transmission of a block of data, we track slow time variations that channel experiences during the transmission of a block of data. We design an adaptive coding technique for this case. The proposed algorithm is based on iterative decoding and aims to achieve an error probability lower than the permissible threshold while minimizing the energy consumption. Our simulation results, employing Hamming codes, demonstrate that the proposed adaptive coding scheme, decreases the power consumption and consequently increases the network lifespan.

کلیدواژه‌ها [English]

  • Wireless sensor networks
  • correlated fading channels
  • adaptive coding
  • iterative decoding

مراجع

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سابقه مقاله

  • تاریخ دریافت: 31 شهریور 1397
  • تاریخ بازنگری: 18 فروردین 1398
  • تاریخ پذیرش: 01 اردیبهشت 1398
  • تاریخ اولین انتشار: 01 اردیبهشت 1398

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