Designing Diversity-Enabled Power Profiles for Decode-and-Forward Wireless Relay Networks

Choi, Giwan; Ma, Xiaoli; Zhang, Wei

doi:10.1109/twc.2011.052311.100515

Cited by 12 publications

(8 citation statements)

References 17 publications

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“…The main reason why both schemes have the same slope is that there is a possibility that errors can come out when the relay R decodes the data symbols from the S. Since it is imperfect for decoding the data symbol at the relay R, the advantage of the cooperative diversity scheme is limited to few dB gain. Note that the cooperative diversity limitation of the decode-and-forward method both on conventional and incremental relaying schemes can be alleviated by applying power scaling factor at relay R [21].…”

Section: Simulation Resultsmentioning

confidence: 99%

Network modulation (NeMo)-aided OFDM incremental relay systems

Lee

2013

2013 IEEE Global Communications Conference (GLOBECOM)

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In this paper, we propose the new incremental relaying scheme using network modulation (NeMo) concept in OFDM-based systems. We first introduce how to integrate NeMo to OFDM incremental relay and show how both cooperative diversity and frequency diversity can be achieved on incremental relaying schemes. From the simulation results, it is confirmed that NeMo enables OFDM incremental relay to enjoy the frequencyselective diversity from grouping and subcarrier interleaving and to partially obtain the cooperative diversity gain for all the symbols, which is different from the conventional incremental relaying method. By increasing the NeMo modulator size, it is shown that the diversity gain is also increased causing the performance improvement in term of bit error rate.

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Section: Simulation Resultsmentioning

confidence: 99%

Network modulation (NeMo)-aided OFDM incremental relay systems

Lee

2013

2013 IEEE Global Communications Conference (GLOBECOM)

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“…The source node S communicates with the destination node D through multiple hops. It is assumed that at each intermediate node applies either a "decode or forward" [22], or an "amplify and forward" [23] method. Moreover, all nodes operate in half duplex, i.e.…”

Section: Multi-hop System Model and Espar Specificationsmentioning

confidence: 99%

A parasitic antenna array for directive multi-hop sensor communication

Barousis

Roumpakias

Papadias

2013

2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

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Due to the strict size and power constraints of wireless sensor nodes, the design of a compact and energy efficient antenna module with adaptive directive gains is an extremely crucial problem. Conventional solutions are often prohibitive for such applications, as they require multiple radiofrequency (RF) chains that increase dramatically the hardware complexity and the power consumption. Motivated however by the benefits of adaptive antennas, which reflect to significant performance gains in a sensor network, this paper proposes an alternative design with pattern-switching ability, built on parasitic antenna elements that overcomes the aforementioned drawbacks. Indeed, it will be shown that the proposed compact antenna design might be a strong candidate for small-sized sensor nodes with low power constraints, since it requires a single RF chain and provides high directive gain. This implies remarkable hardware and energy savings, but without compromising the performance gains of the sensor network.

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“…From this perspective, the DF strategy is more simple and practical [5]. However, due to the probable errors at the relay, deploying the conventional MRC is not successful in achieving the full cooperative diversity [9]. A powerful weighted combiner referred to as cooperative MRC (C-MRC) is able to achieve the cooperative diversity in a DF strategy [10].…”

Section: Introductionmentioning

confidence: 99%

“…The detection performance at the SR link plays an important role in the DF strategy. By applying an appropriate power profile at the relay, it is possible to achieve the cooperative diversity [5,9,12,13]. Coding strategies can guarantee the reliability of the SR link [4] with the cost of a bandwidth loss.…”

Section: Introductionmentioning

confidence: 99%