Bit error probability analysis of UWB communications with a relay node

Zeinalpour-Yazdi, Zolfa; Nasiri-Kenari, Masoumeh; Aazhang, Behnaam

doi:10.1109/twc.2010.02.090383

Cited by 32 publications

(14 citation statements)

References 36 publications

(53 reference statements)

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“…In addition, to ensuring the accuracy of the analytical results, simulation curves are also plotted, which follow the analytical ones. It should be mentioned that in deriving the analytical results, the only step where we use an approximation is where we apply the GQR method to replace the complicated integrals in (21) with the finite summation given in (25). This approximation is exact especially when the order of orthogonal polynomials is high.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…In the other words, if a chip collision occurs in a frame, other frames associated with same transmitted symbols and same users may probably not experience collisions. Also, to be sure that only one pulse is sent in each frame, it is necessary that N h T c ≤ T f where T f is the frame duration [21,22]. Hence the transmitted signal from the MBS to its users can be written as…”

Section: Time-hopping-based Femtocell and Macrocell Signalsmentioning

confidence: 99%

“…It has been shown in [26] that this integral cannot be solved through analytical methods and numerical approach should be used. So in this work to achieve a semi-closed form, we use the GQR method to approximate E i (ω) with a good precision [19][20][21]. …”

Section: Cross-layer Interferencementioning

confidence: 99%

“…We derive a 'semi-closed-form' expression for the outage probability of an MUE, in the vicinity of some FAPs in a femtocell network employing the described TH technique. To compute the outage probability, we face some complicated integrals and employ the Gaussian quadrature rules (GQRs) for our analytical derivation [19][20][21]. The accuracy of this approach is confirmed by simulations.…”

Section: Introductionmentioning

confidence: 99%

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Downlink performance of two‐tier networks with time‐hopping modulation

Banitalebi¹,

Zeinalpour-Yazdi²

2015

IET Communications

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With growing demand for high data rates, the mobile network has faced excessive traffic and it seems that one of the few long-term solutions to this problem is employing femtocells which improve capacity and indoors coverage. In the typical femtocell networks, co-and cross-layer interferences caused by simultaneous transmission of macrocell base stations and femtocell access points in the same frequency band, results in dead spots especially if femtocells are densely employed. In this study, to mitigate the interference and improve the system's performance, the authors study the application of time-hopping approach. Particularly, the impact of aggressive signals of femto access points on a macro user equipment located in the second tier, that is, the femtocell coverage area, is analysed and the semi-closedform expression for the system outage probability is derived. Based on the analysis, they also simulate the transmission capacity (TC) that represents the total capacity of the co-channel two-tier networks with outage constraints. Next, employing Gaussian approximations, they derive upper and lower bounds on the outage probability. These bounds provide better insight on the effect of system's parameters on its performance. Their numerical results show that the time-hopping technique significantly reduces the outage probability and therefore increases the TC of two-tier networks.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Time-hopping-based Femtocell and Macrocell Signalsmentioning

confidence: 99%

Section: Cross-layer Interferencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Downlink performance of two‐tier networks with time‐hopping modulation

Banitalebi¹,

Zeinalpour-Yazdi²

2015

IET Communications

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“…The performance achievable in UWB communications assisted by relays with decode-andforward protocol has been recently investigated. An analysis through characteristic functions and numerical evaluations has been proposed in [12] by modeling the links according to IEEE 802. 15.4a standards, while in [13] UWB multiple-input multiple-output (MIMO) systems with power allocation have been investigated, where each link is modeled with tappeddelay-lines, Nakagami-m fading, and exponential power delay profile.…”

Section: Introductionmentioning

confidence: 99%

Relay-assisted UWB communications: links characterization and power allocation

Palombara

Conti

Tralli

2011

2011 IEEE International Conference on Ultra-Wideband (ICUWB)

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Ultra-wide bandwidth (UWB) technology is rising interest for several applications dealing with wireless communication and network localization. Inherent coverage limitations can be overcome via relaying. We propose an analytical framework for the performance evaluation of relay-assisted UWB communications that account for (a) new single link characterization in IEEE 802.15.4a channels, (b) network topology, and (c) various power allocation techniques. Starting from a new class of tight bounds characterizing the performance in each link, the framework enables to quantify the benefits of relaying for ideal power control, uniform power distribution and optimal power allocation minimizing the bit error probability (BEP).

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Performance analysis of impulse‐radio ultra‐wideband energy detector system using cooperative dual‐hop amplify and forward strategy

Hazra

Tyagi

2015

Int J Communication

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A novel analytical representation of bit error rate (BER) performance of an impulse-radio ultra-wideband energy detector on-off keying system using cooperative dual-hop amplify and forward relay technology, with various diversity combining schemes over IEEE 802.15.4a environment is presented in this paper. In particular, the approximate expressions based on energy detection principle are derived for various diversity combining cases, namely linear optimal combining, linear combining, and selective combining. Simulation results depict an improvement in BER performance, with increase in number of relay paths (L) and decrease in number of frames per symbol (N f ). Furthermore, the BER performance of the impulse-radio ultra-wideband energy detector on-off keying system improves substantially using dual-hop cooperative amplify and forward scheme, compared with that of non-cooperative or single link scenario. Among the diversity combining schemes, linear optimal diversity combining performs better when compared with linear diversity combining and selective combining. The analytical BER expressions are validated with the simulation results, which confirm the accuracy and precision in approximation used in the investigation of BER. energy detector (ED) receiver is introduced, which works by squaring the received signal followed by integration and detection through decision device [8][9][10].Owing to the strict guidelines issued by the Federal Communications Commission [1], UWB systems can operate at a maximum transmit power spectral density (PSD) of 41.3 dBm/MHz in order to avoid interference with other existing technologies. The low PSD of UWB signals not only limits it from achieving a wide coverage area but also makes its performance sensitive to distance [11,12]. Hence, to overcome such weaknesses, cooperative technology was introduced, which emerged as the perfect scheme to improve quality of service, coverage area, transmission reliability, and power efficiency [13,14].The simplest form of cooperative network, that is, a relay network, was first introduced by Meulen [15] and Gamal [16]. In cooperative technology, cooperative terminals or nodes share information and other resources through antennas, to create a virtual array through distributed transmission. Cooperative relay strategy protocols can be classified as amplify and forward (AF), detect and forward, and decode and forward (DF) [17,18]. The authors [19][20][21] have extended the use of AF and DF relay strategies in IR-UWB systems. Cho et al. [22] introduced the concept of cooperative dual-hop AF relaying scheme in IR-UWB system, whose results showed better performance than without using relay scheme. Among the previous contributions, Hamdi [23,24] analyzed the BER performance of IR-UWB differential transmitted reference system using dual-hop and multihop relay strategy. Maichalernnukul [25] discussed the BER performance of IR-UWB system using multi-antenna relay technology into dual-hop system, while Yazdi [11,26] investigated the BER performance of IR-UWB...

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Bit error probability analysis of UWB communications with a relay node

Cited by 32 publications

References 36 publications

Downlink performance of two‐tier networks with time‐hopping modulation

Downlink performance of two‐tier networks with time‐hopping modulation

Relay-assisted UWB communications: links characterization and power allocation

Performance analysis of impulse‐radio ultra‐wideband energy detector system using cooperative dual‐hop amplify and forward strategy

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