نتایج جستجو برای: full duplex

تعداد نتایج: 312136  

Journal: :Ad Hoc Networks 2015
Xudong Wang Aimin Tang Pengfei Huang

Random medium access control (MAC) plays a critical role in OFDMA wireless networks to support services with bursty traffic. However, the existing OFDMA random access protocols suffer from low efficiency due to the constraints in half-duplex communications. In this paper, the capability of full-duplex communications is leveraged to propose novel mechanisms such as full duplex carrier sensing, c...

2018
Hui Dun Shuhong Jiao Dandan Liu

Device-to-device (D2D) pairs are allowed to reuse the spectrum of cellular users who are in a good quality channel state with underlaying cellular network. However, cellular users usually suffer a poor performance in term of achievable rate when they are in a cell edge or in deep fading. To solve this problem, a hybrid relay-aided D2D communication scheme with a two-antenna infrastructure and u...

Journal: :IEEE open journal of the Communications Society 2021

Full-duplex (FD) transmissions have emerged as a spectrally efficient technology with the evolution of enhanced self-interference (SI) suppression techniques. However, FD transmission mode (TM) may not consistently outperform half-duplex (HD) TM due to residual SI. In contrast, an adaptive FD/HD scheme utilizes advantages both and HD TM. This paper proposes for cooperative device-to-device (C-D...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده برق و کامپیوتر 1394

شبکه afdx (avionics full-duplex switched ethernet) برای کاربردهای هوایی که نیازمند ایمنی بالایی هستند طراحی شده است. در شبکه اترنت هیچ تضمینی در مورد زمان رسیدن اطلاعات وجود ندارد. با اضافه کردن لینک مجازی یک شبکه با قابلیت اطمینان بالا به صورت تمام دوطرفه محقق می شود. هدف از این پایان نامه طراحی و پیاده سازی نرم افزاری و سخت افزاری واسط afdx برای استفاده در شبکه انتقال داده داخل یک هواگرد است....

Journal: :international journal of information science and management 0
a. r. zolghadr asli ph.d., dept. of electrical engineering, school of engineering, shiraz university, shiraz e. goodarzi m.s.,graduate, dept. of electrical engineering, school of engineering, shiraz university,shiraz m. moosavinezhad m.s.,iran telecommunication, research center (itrc), tehran

this paper presents a full duplex, real time implementation of itu-t g.723.1 [7,8] speech coder using the tms320c5402 dsp chip which is based on a 16 bit fixed-point architecture. an optimization method is proposed in order to reduce the total necessary cycle time consumed in real-time implementation. the multi-pulse maximum likelihood quantization (mp-mlq) excitation search block which is the ...

Journal: :IEEE Transactions on Wireless Communications 2015

Journal: :EURASIP Journal on Advances in Signal Processing 2018

Journal: :IEEE Transactions on Cognitive Communications and Networking 2016

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