Development of OFDM based secondary link: Some experimental results on USRP N210 platform

Janjic, Milos; Brkovic, Milenko; Moulines, Éric

doi:10.5937/telfor1401030j

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…Extension of OFDM systems to OFDMA is also implemented using SDRs [59] with NI-USRP 210 model. In [60], the authors implemented OFDM-based secondary cognitive link by using USRP N210 platforms.…”

Section: Sdr Implementation Of Ofdm/ofdma-based Systemsmentioning

confidence: 99%

OFDMA-based network-coded cooperation: design and implementation using software-defined radio nodes

Gökçeli

Alakoca

Basaran

et al. 2016

EURASIP J. Adv. Signal Process.

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Benefits of network coding towards enhancing communication quality, both in terms of robustness or data transmission rates, make it a significant candidate as a future networking technology. Conventionally, network coding is mostly used in wired infrastructures, where transmission errors between nodes are negligible. Capturing the provided benefits of network coding via straightforward extension from wired networks to wireless networks is not trivial. In addition to the challenges introduced through the wireless channel impairments, we can also capture the spatial diversity gain provided by the broadcast nature of the wireless channels. In this work, we design and implement a network-coded cooperation (NCC) system that operates in real time through the use of software-defined radio (SDR) nodes for the first time in the literature. We specifically target wireless networks. Our system is based on orthogonal frequency division multiple access (OFDMA) that provides a practical means to enable high transmission rates through the use of narrowband subcarriers. The developed testbed is composed of three source nodes, a relay node and two destination nodes. The transmission of the proposed NCC-OFDMA system is completed in two phases; the broadcast and the relaying phases. Multiplexing of source nodes' signals is achieved through OFDMA technique. In the broadcast phase, an OFDMA signal is transmitted to relay and destination nodes. In the relaying phase, the relay node first detects the OFDMA signal, generates network-coded symbols, and then transmits these symbols to destination nodes. At the end of these two phases, the destination nodes determine the source nodes' signals by using network decoders. The destination nodes make use of both the uncoded and network-coded symbols, which are received in broadcast and relaying phases, respectively. Destination nodes then perform network decoding. Through real-time bit error rate and error vector magnitude measurements, we show that the NCC-OFDMA system can significantly improve the communication quality and robustness, while enabling data transmission between multiple users, as known from theoretical analyses. Some features of this implemented NCC-OFDMA system have the potential to be included in 5G standards, due to the improved radio resource usage efficiency.

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Section: Sdr Implementation Of Ofdm/ofdma-based Systemsmentioning

confidence: 99%

OFDMA-based network-coded cooperation: design and implementation using software-defined radio nodes

Gökçeli

Alakoca

Basaran

et al. 2016

EURASIP J. Adv. Signal Process.

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An empirical model of the SBX daughter board output power driven by USRP N210 and GNU radio based software defined radio

Zitouni¹,

Ataman

2015

2015 IEEE 12th International Multi-Conference on Systems, Signals &Amp; Devices (SSD15)

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A solution to coexistence of OFDM and FH signals based on principles of cognitive radio implemented on USRP N210 platform

Moulines

Janjic

2014

2014 22nd Telecommunications Forum Telfor (TELFOR)

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A new concept development and practical implementation of OFDM based secondary cognitive link are presented in this paper. Coexistence of secondary user employing Orthogonal Frequency Division Multiplexing (OFDM) and primary user employing Frequency Hopping (FH) is achieved. Secondary and primary links are realized using Universal Software Radio Peripheral (USRP) N210 platforms. Cognitive features of spectrum sensing and changing transmission parameters are implemented. Some experimental results are presented.

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Development of OFDM based secondary link: Some experimental results on USRP N210 platform

Cited by 5 publications

References 8 publications

OFDMA-based network-coded cooperation: design and implementation using software-defined radio nodes

OFDMA-based network-coded cooperation: design and implementation using software-defined radio nodes

An empirical model of the SBX daughter board output power driven by USRP N210 and GNU radio based software defined radio

A solution to coexistence of OFDM and FH signals based on principles of cognitive radio implemented on USRP N210 platform

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