Uplink Relaying Scheme for Efficient Frequency Usage in Cognitive Radio Networks
نویسندگان
چکیده
منابع مشابه
Adaptive relaying scheme for cognitive radio networks
Cognitive radio (CR) systems allow unlicensed secondary users to transmit on the licensed frequency bands without degrading the licensed primary transmissions. Combining CR with other emerging transmission techniques, such as user cooperation may have many benefits on both the primary and secondary transmissions. In this study, the authors propose and investigate an adaptive relay-based coopera...
متن کاملJoint cooperative relay scheme for spectrum-efficient usage and capacity improvement in cognitive radio networks
In order to improve the efficiency of spectrum resource usage and the capacity of wireless networks, cooperative relay techniques which utilize the vacant spectrum of primary users for secondary users’ data transmission have been applied in cognitive radio networks. Considering the dynamic time-varying vacant spectrum resources and achievable rate on different channels at relay nodes (RN), the ...
متن کاملOutage Capacity Analysis of a Cooperative Relaying Scheme in Interference Limited Cognitive Radio Networks
In this study, we investigate the outage capacity of a cooperative relaying based cognitive radio network in slow fading channel. Our network scenario consists of a primary transmitter (PT) and primary receiver (PR) as well as a group of M secondary transmitter (ST)–receiver (SR) pairs. We grouped STs into active and inactive. Only one active ST may transmit data at a time in parallel with the ...
متن کاملRelaying Strategies for Uplink in Wireless Cellular Networks
In this paper, we analyze the impact of relays on the uplink performance of FDMA cellular networks. We focus our analysis on Decode and Forward techniques, with the aim of measuring the improvements which can be achieved in terms of throughput and energy saving. We apply a stochastic geometry based approach to a scenario with inter-cell interference and reuse factor equal to 1. The first goal o...
متن کاملOFDMA-Based Cognitive Radio Networks With Relaying Capability
In this paper, a novel OFDMA-based cognitive cooperative relaying scheme is proposed in which cognitive users assist primary users by relaying their information. Both primary users (PU) and cognitive users (CR) communicate to a common base station (BS). Based on the received feedback, cognitive users relay data of primary users. Two different schemes of relay assignment and power allocation are...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Korean Institute of Communications and Information Sciences
سال: 2011
ISSN: 1226-4717
DOI: 10.7840/kics.2011.36a.4.356