Performance improvement of fixed wireless access networks by conjunction of dual polarization and time domain radio resource allocation technique

Vavoulas, Alexander; Vaiopoulos, Nicholas; Varoutas, Dimitris; Chipouras, Aris; Stefanou, G.

doi:10.1002/dac.1167

Cited by 6 publications

(6 citation statements)

References 10 publications

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“…After the substitution of (15) into (14) and some mathematical manipulation, we obtain the closedform expression for the BER of the proposed scheme:…”

Section: Bit Error Rate Derivationmentioning

confidence: 99%

BER minimization for dual‐polarized wireless systems with polarization‐domain rotation

Noh

Bahng

Park

2015

Int J Communication

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SUMMARYWe consider the problem of bit error rate (BER) degradation because of the power gain imbalance between horizontal (H )-polarization and vertical (V )-polarization components in an orthogonal dualpolarization transmission system. To alleviate the aforementioned BER degradation problem, we propose a non-orthogonal polarization-domain rotation scheme where the axes of H -polarization and V -polarization components are rotated with different angles at the transmitter and de-rotated at the receiver. In addition, in order to assess the effectiveness of the polarization-domain rotation scheme, we derive the closed-form BER expression under a practical dual-polarized channel model, which is represented by cross-polarization ratio and co-polarization ratio (CPR). We also derive the approximated BER expressions for the two asymptotic values of CPR: balanced CPR and infinite CPR. With the derived BER expressions, we find the optimal rotation angles that jointly minimize the BER. According to the numerical results, it is shown that about 3 dB E b =N 0 gain is obtained at the BER of 10 4 and the CPR of 10 dB by the polarization-domain rotation scheme with optimal rotation angles compared with the conventional orthogonal dual-polarization transmission.

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“…After the substitution of (15) into (14) and some mathematical manipulation, we obtain the closedform expression for the BER of the proposed scheme:…”

Section: Bit Error Rate Derivationmentioning

confidence: 99%

BER minimization for dual‐polarized wireless systems with polarization‐domain rotation

Noh

Bahng

Park

2015

Int J Communication

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“…Various resource allocation methods have been proposed in the literature that can mitigate inter-cell and intra-cell interference and, consequently, can improve the system performance [17][18][19][20][21][22][23]. The authors in [17] propose a conjunction of dual polarization and time domain resource allocation technique.…”

Section: Related Workmentioning

confidence: 99%

“…The authors in [17] propose a conjunction of dual polarization and time domain resource allocation technique. However, it also includes the changing of the polarization whereas, we are targeting the resource allocation that can mitigate inter-cell in a selforganizing manner and improves system performance.…”

Section: Related Workmentioning

confidence: 99%

A self-organized metaheuristic approach towards inter-cell interference management for LTE-Advanced

Shahid

Aslam

Sohaib

et al. 2014

J Wireless Com Network

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In order to meet the high throughput demand set by international mobile telecommunication union, carrier aggregation is exploited for expanding the bandwidth of up to 100 MHz in Long Term Evolution-Advanced (LTE-A). For achieving the aforementioned bandwidth, a maximum of five component carriers (CCs) can be aggregated as per Release 10 LTE-A. Improper CC selection and scheduling will result in hazardous throughput, fairness, and interference problems. Therefore, a proper CC selection and scheduling algorithm is most important for the overall performance of the network. On the other hand, due to an increased information exchange, centralized network planning is not a suitable choice here. In this study, we are employing a self-organized particle swarm optimization (PSO)-based joint component carrier selection and scheduling (JCCS) algorithm for the downlink. More precisely, the concern of the proposed algorithm is the autonomous distribution of resource blocks (RBs) from the pool of CCs by the base station, with the concern of minimizing the impact of inter-cell interference. Our proposed PSO-based JCCS algorithm results in the maximization of the min-max throughput by managing the inter-cell interference in an appropriate manner. Moreover, the proposed algorithm is compared with the traditional CC selection and scheduling algorithms, i.e., random, round robin, and proportional fair. The comparison is carried out in terms of throughput and fairness, and the calculated percentage gain in the end elaborates the performance improvement by exploiting PSO-based JCCS.

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“…In other experimental studies that consider path loss modeling for directional antenna systems [35,36], the authors compute different PLEs for different areas of the cell that consist of different terrains (but not different PLEs for different directional antennas of the same base station). There are also related studies that utilize single PLE for directional antenna systems [37][38][39].…”

Section: Rss-based Location Estimation Modelmentioning

confidence: 99%

Location estimation using RSS measurements with unknown path loss exponents

Zeytinci

Sari

Harmanci

et al. 2013

J Wireless Com Network

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The location of a mobile station (MS) in a cellular network can be estimated using received signal strength (RSS) measurements that are available from control channels of nearby base stations. Most of the recent RSS-based location estimation methods that are available in the literature rely on the rather unrealistic assumption that signal propagation characteristics are known and independent of time variations and the environment. In this paper, we propose an RSS-based location estimation technique, so-called multiple path loss exponent algorithm (RSS-MPLE), which jointly estimates the propagation parameters and the MS position. The RSS-MPLE method incorporates antenna radiation pattern information into the signal model and determines the maximum likelihood estimate of unknown parameters by employing the Levenberg-Marquardt method. The accuracy of the proposed method is further examined by deriving the Cramer-Rao bound. The performance of the RSS-MPLE algorithm is evaluated for various scenarios via simulation results which confirm that the proposed scheme provides a practical position estimator that is not only accurate but also robust against the variations in the signal propagation characteristics.

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Performance improvement of fixed wireless access networks by conjunction of dual polarization and time domain radio resource allocation technique

Cited by 6 publications

References 10 publications

BER minimization for dual‐polarized wireless systems with polarization‐domain rotation

BER minimization for dual‐polarized wireless systems with polarization‐domain rotation

A self-organized metaheuristic approach towards inter-cell interference management for LTE-Advanced

Location estimation using RSS measurements with unknown path loss exponents

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