Performance Analysis of Adaptive M-QAM for Rayleigh Fading Cooperative Systems

Nechiporenko, T.; Phan, Khoa T.; Tellambura, Chintha; Nguyen, Ha H.

doi:10.1109/icc.2008.638

Cited by 43 publications

(48 citation statements)

References 19 publications

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“…In this paper, we significantly extend the analysis of CAF relay networks with constant power M-QAM adaptive rate transmission in [11] to a more general stochastic fading environment (i.e, [11] presented the results for only Rayleigh fading channel). Specifically, we analyze the performance of CAF relay networks with both ADR M-QAM and M-PSK modulation for improving the average link spectral efficiency, while satisfying a prescribed instantaneous BER performance.…”

Section: I)development Of Flexible Generalized Analytical Frameworkmentioning

confidence: 99%

“…Specifically, we analyze the performance of CAF relay networks with both ADR M-QAM and M-PSK modulation for improving the average link spectral efficiency, while satisfying a prescribed instantaneous BER performance. More importantly, in contrast to [9], [10] and [11], we come up with a new analytical framework (i.e., generalized to wide range of fading environment, once the MGF of end-to-end SNR of a particular fading environment is readily available) based on the marginal MGF for evaluating the ABER, mean spectral utilization efficiency and outage probability performance metrics. Extending the probability density function (PDF) method employed in [9], [10]- [11] to a generalized fading channel with i.n.d fading statistics appears intractable or very cumbersome.…”

Section: I)development Of Flexible Generalized Analytical Frameworkmentioning

confidence: 99%

“…While authors in [10] investigate the performance of a cooperative decode-and-forward relay network with five-modes adaptive M-QAM transmission in an i.i.d Nakagami-m wireless fading environment. It is interesting to note that, authors in [11] derived bounds for the outage probability, achievable spectral efficiency, and error rate performance of a link-adaptive amplify-and-forward cooperative diversity system with limited CSI, in which the rate at the source node is adapted according to channel conditions (i.e., only feedback of the effective SNR at the destination node is required to be available at the source node), while the relays simply amplify and forward the signals. For the analysis, they considered the MGF based approach to compute the above performance metrics using adaptive M-QAM technique in CAF relay networks.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Performance Improvement of Non-Regerative Cooperative Relay Networks with Optimal Power Allocation and Adaptive M-QAM/M-PSK Modulation Over Generalized Fading Channels

Modi¹,

Annamalai²,

Olabiyi³

et al. 2016

IJWMN

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This paper analyzes the performance of Channel Side Information (CSI)-assisted cooperative amplify-andforward (CAF) relay networks that employ both the node placement (i.e., relay position) based optimal power allocation policy among collaborating nodes and adaptive M-ary quadrature amplitude modulation (M-QAM)/ M-ary phase shift keying (M-PSK KEYWORDSCooperative diversity, adaptive modulation, optimum power allocation, relay node placement MOTIVATIONThe increasing demand for wireless communication system in recent years has necessitated a need to improve the performance, reliability and data rate of wireless channels. To address these needs, several attempts have been made on each of these improvement areas. The broadcast nature of wireless transmissions has enabled a new communication paradigm known as "cooperative communication" where a source node communicates with a destination node with the help of one or more relay nodes to harness a new form of spatial diversity and combat the effect of multipath fading. Cooperative communication serves as an alternative to conventional space diversity technique (i.e., Multiple Input Multiple Output (MIMO) technique), as the size of communication nodes (i.e., mobile handheld devices or wireless sensors) may not accommodate multiple transmit and/or receive antennas. Cooperative diversity also referred to as a "distributed MIMO" provides additional reliability to the wireless system.

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Section: I)development Of Flexible Generalized Analytical Frameworkmentioning

confidence: 99%

Section: I)development Of Flexible Generalized Analytical Frameworkmentioning

confidence: 99%

mentioning

confidence: 99%

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Performance Improvement of Non-Regerative Cooperative Relay Networks with Optimal Power Allocation and Adaptive M-QAM/M-PSK Modulation Over Generalized Fading Channels

Modi¹,

Annamalai²,

Olabiyi³

et al. 2016

IJWMN

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show abstract

“…Formally, if BER rd ≤ 10 -2 , Equation (12) can be inverted and yields the maximum constellation size M' that the RS can use for a given SNR rd and pre-fixed target BER rd as [16]:…”

Section: Use Of Hierarchical Modulation and Link Adaptive Relayingmentioning

confidence: 99%

“…The BER k of a given user k for an M-QAM system over an AWGN channel is related to its SNR k through the following equation [16]:…”

Section: Use Of Hierarchical Modulation and Link Adaptive Relayingmentioning

confidence: 99%

Cooperative relaying in OFDMA networks based on the joint use of hierarchical modulation and link adaptation

Jdidi

Chahed

2012

J Wireless Com Network

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In cooperative relaying, the base station broadcasts a signal to the destination, the relay overhears it and forwards it in a next time slot to the destination. The latter combines the two received copies of the signal in order to reconstruct the original one. In this study, we consider a relay-based OFDMA network, as is the case of long term evolution advanced systems. We, first, make use of hierarchical modulation to send additional information to the relay so as to enable it to reconstruct a more robust copy of the original signal, and, second, adapt the transmission from the relay to the destination by taking advantage of the typically good radio conditions between them so as to reduce the cost of additional resources needed by relaying and hence improve the overall system capacity. We model such a system at the user level, considering a realistic arrival and departure setting and quantify the gains thus achieved in a cross-layer manner, in terms of throughput and blocking probability. We, eventually, propose an enhancement to the afore-mentioned scheme that takes advantage of the good radio conditions of users who are close to the base station to send them an additional stream using hierarchical modulation.

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Capacity Analysis of Opportunistic Cooperative Networks under Adaptive Transmission over Rayleigh Fading Channels

Kong

Bao

2010

Wireless Pers Commun

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In this paper, opportunistic cooperative amplify-and-forward networks in conjunction with three different adaptive policies, namely optimal simultaneous power and rate adaptation (OPRA), constant power with optimal rate adaptation (OPA) and truncated channel inversion with fixed rate (TIFR), are investigated and compared in terms of Rayleigh channel capacity where the source adapts its rate and/or power level according to channel conditions while the best relay simply amplifies and then forwards the received signals. Furthermore, the effect of diversity combining on the network is studied by investigating two cases of maximal ratio combining (MRC) and selection combining (SC) equipped at the destination. To this end, the mathematically tractable form of the upper and lower bound of the end-to-end effective signal-to-noise ratio (SNR) is provided and then used to derive the closed-form expression of the Shannon capacity. Our results are verified through comparison with Monte Carlo simulations in some representative scenarios where we also illustrate that, among them, for an arbitrary number of cooperative relays, OPRA slightly outperforms ORA, which, in turn, outperforms TIFR.

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Performance Analysis of Adaptive M-QAM for Rayleigh Fading Cooperative Systems

Cited by 43 publications

References 19 publications

Performance Improvement of Non-Regerative Cooperative Relay Networks with Optimal Power Allocation and Adaptive M-QAM/M-PSK Modulation Over Generalized Fading Channels

Performance Improvement of Non-Regerative Cooperative Relay Networks with Optimal Power Allocation and Adaptive M-QAM/M-PSK Modulation Over Generalized Fading Channels

Cooperative relaying in OFDMA networks based on the joint use of hierarchical modulation and link adaptation

Capacity Analysis of Opportunistic Cooperative Networks under Adaptive Transmission over Rayleigh Fading Channels

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