Performance of Cooperative Spatial Multiplexing SISO/MIMO Communication Systems with Constellation Rearrangement technique

Bahadori-Jahromi, Farhad; Pourmina, Mohammad Ali; Masnadi-Shirazi, Mohammad Ali

doi:10.1007/s13369-013-0661-7

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…Constellation rearrangement (CoRe) is also an interesting technique which has been employed recently in [47,48] to achieve significant gains in term of SER in physical layer. In CoRe, different bits to symbol mapping is done in order to maximize minimum squared Euclidean distance (SED) between neighboring symbols.…”

Section: Introductionmentioning

confidence: 99%

Cross layer design in multi-hop networks with adaptive modulation along with constellation rearrangement

Bahadori-Jahromi

Pourmina

2015

Wireless Netw

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Distributed nature of wireless sensor network raises a number of design challenges, especially when energy-efficiency and Quality of Service requirements are to be taken into consideration. These challenges can only be met by allowing closer cooperation and mutual adaptation between the protocol layers, referred to as a crosslayer design paradigm. In this paper, we explain the operating stages for adaptive sleep with adaptive modulation based on the MAC layer protocol. By using adaptive sleep with adaptive modulation the total time for completing one packet is adaptively reduced. Therefore, not only the transmission time is adapted by adaptive modulation, but also the sleep time is varied by adaptive sleep. A cross-layer, optimization scheme, based on adaptive sleep with adaptive modulation along with constellation rearrangement and power control, is proposed in this paper for minimizing energy cost and enhancing the network longevity. The adaptive sleep with adaptive modulation along with constellation rearrangement algorithm changes the modulation scheme dynamically by using constellation rearrangement while adjusting the node sleep periods and power levels. The paper considers several variations of these schemes and analyzes and compares their performance under various traffic intensity based on extensive computer simulations. Finally the proposed scheme is evaluated through NS2 simulations in terms of throughput.

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Section: Introductionmentioning

confidence: 99%

Cross layer design in multi-hop networks with adaptive modulation along with constellation rearrangement

Bahadori-Jahromi

Pourmina

2015

Wireless Netw

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“…This paper addresses this issue by developing multiple primary users' spectrum leasing scenario in presence of SH and FH. Since several PTs may simultaneously choose same secondary user, it is necessary to consider multi-antenna equipment on cooperative STs [16]. The main contributions of this work can be summarized as follows: (1) Multi primary users' spectrum leasing in presence of space and frequency heterogeneities is designed and implemented based on the analytical result.…”

Section: Introductionmentioning

confidence: 99%

Stackelberg Game on Space and Frequency Heterogeneity Analysis in an OFDMA-Based Cognitive Spectrum Leasing

Pourmina

Moradikia

2015

Wireless Pers Commun

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With the development of cognitive radio technologies, dynamic spectrum access (DSA) techniques are being regarded as a promising approach to increase the efficiency of spectrum utilization and to solve spectrum scarcity problem. This comes as a greater challenge in a cellular network where there are multiple primary users (PUs) who communicate with their access point while the other secondary users (SUs) want to use PU's spectrum. On the other hand, heterogeneity in terms of space and frequency can affect the primary users' decision to release their spectrum to the SUs. In this respect, the present paper is intended to address this issue and thus propose a solution with regard to the reward and punishment policy and equivalent revenue per unit transmission parameter. It has to be noted that both PUs and SUs aim to maximize their utilities in terms of their transmission rate and revenue/payment. Therefore, the proposed model is formulated as a Stackelberg Game, and a unique Nash Equilibrium Point is achieved by analytical procedure. Based on the analyses, the paper presents the conditions under which cooperation will enhance the performance of the whole system. Both analytical and numerical results reveal that the cooperative cognitive radio framework is a promising framework under which the utility of both the primary and secondary systems is maximized.

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“…However, it does not achieve spatial transmit diversity since each antenna transmits an independent data stream. Such a SMC has been adopted in cooperative systems as well as cognitive radio systems in order to improve the spectral efficiency [ 5 – 7 ].…”

Section: Introductionmentioning

confidence: 99%

SER Performance of Enhanced Spatial Multiplexing Codes with ZF/MRC Receiver in Time-Varying Rayleigh Fading Channels

Lee

2014

The Scientific World Journal

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We propose enhanced spatial multiplexing codes (E-SMCs) to enable various encoding rates. The symbol error rate (SER) performance of the E-SMC is investigated when zero-forcing (ZF) and maximal-ratio combining (MRC) techniques are used at a receiver. The proposed E-SMC allows a transmitted symbol to be repeated over time to achieve further diversity gain at the cost of the encoding rate. With the spatial correlation between transmit antennas, SER equations for M-ary QAM and PSK constellations are derived by using a moment generating function (MGF) approximation of a signal-to-noise ratio (SNR), based on the assumption of independent zero-forced SNRs. Analytic and simulated results are compared for time-varying and spatially correlated Rayleigh fading channels that are modelled as first-order Markovian channels. Furthermore, we can find an optimal block length for the E-SMC that meets a required SER.

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Performance of Cooperative Spatial Multiplexing SISO/MIMO Communication Systems with Constellation Rearrangement technique

Cited by 6 publications

References 10 publications

Cross layer design in multi-hop networks with adaptive modulation along with constellation rearrangement

Cross layer design in multi-hop networks with adaptive modulation along with constellation rearrangement

Stackelberg Game on Space and Frequency Heterogeneity Analysis in an OFDMA-Based Cognitive Spectrum Leasing

SER Performance of Enhanced Spatial Multiplexing Codes with ZF/MRC Receiver in Time-Varying Rayleigh Fading Channels

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