SENSITIVITY OF CELLULAR WIRELESS NETWORK PERFORMANCE TO SYSTEM &amp; PROPAGATION PARAMETERS AT CARRIER FREQUENCIES GREATER THAN 2 GHz

Anang, Kwashie; Rapajic, P.B.; Bello, Lawal; Wu, Ruiheng

doi:10.2528/pierb12012303

Cited by 11 publications

(8 citation statements)

References 29 publications

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“…Radio-over-fiber (RoF) is a type of communication technology that combines millimeter-wave (mm-wave) with optical communication [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Development of a New Approach for High-Quality Quadrupling Frequency Optical Millimeter-Wave Signal Generation Without Optical Filter

Al-Shareefi

Hassan

Malek

et al. 2013

PIER

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Abstract-In this paper, we propose a new approach to generate quadrupling-frequency optical millimeter-wave (mm-wave) signal with carrier suppression by using two parallel Mach-Zehnder modulators (MZMs) in Radio-over-fiber (RoF) system. Among the numerous properties of this approach, the most important is that a filterless optical mm-wave at 60 GHz with an optical sideband suppression ratio (OSSR) as high as 40 dB can be obtained when the extinction ratio of the MZM is 25 dB. Simplicity and cost-effectiveness have made this approach a compelling candidate for future wave-division-multiplexing RoF systems.Theoretical analysis is conducted to suppress the undesired optical sidebands for the high-quality generation of frequency quadrupling mm-wave signal. The simulation results show that a 60 GHz mm-wave is generated from a 15 GHz radio frequency (RF) oscillator with an OSSR as high as 40 dB and an radio frequency spurious suppression ratio (RFSSR) exceeding 35 dB without any optical or electrical filter when the extinction ratio of the MZM is 25 dB. Furthermore, the effect of the non-ideal RF-driven voltage as well as the phase difference of RF-driven signals applied to the two MZMs on OSSR and RFSSR is discussed and analyzed. Finally, we establish a RoF system through simulation to verify the transmission performance of the proposed scheme. The Q-factor performance and eye patterns are given.

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“…Radio-over-fiber (RoF) is a type of communication technology that combines millimeter-wave (mm-wave) with optical communication [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Development of a New Approach for High-Quality Quadrupling Frequency Optical Millimeter-Wave Signal Generation Without Optical Filter

Al-Shareefi

Hassan

Malek

et al. 2013

PIER

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“…The main contribution of this thesis is based on the key papers of the author [45][46][47][48][49][50] and other submitted work [51]. However, each chapter provides a detailed summary of contributions made within the chapter.…”

Section: Contributions Of the Thesismentioning

confidence: 99%

“…In a similar manner as in [50,77], for both desired and interference signal power we consider a distance depended path loss wireless channel for our interference model. The LOS propagation system model is depicted in Figure 3.10.…”

Section: System Model For Los Propagation Environmentmentioning

confidence: 99%

Minimum Cell Size for Information Capacity Increase in Cellular Wireless Network

Anang

Rpajic

Eneh

et al. 2011

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)

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“…The amount of signal attenuation during radio propagation, i.e., path loss, characterizes the condition of the channel [4][5][6]. In this regard, the system's frequency and the calculation of the proper link budget have greater influence on the system's performance [7][8][9]. Unfortunately, most of the research related to the WCE's telemetry system has conducted with the random selection of the system's frequency without proper consideration of the propagation characteristics of the human body on the system's frequency [10].…”

Section: Introductionmentioning

confidence: 99%

The Use of a Human Body Model to Determine the Variation of Path Losses in the Human Body Channel in Wireless Capsule Endoscopy

Basar¹,

Malek²,

Juni³

et al. 2013

PIER

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Abstract-Presently, wireless capsule endoscopy (WCE) is the sole technology for inspecting the human gastrointestinal (GI) tract for diseases painlessly and in a non-invasive way. For the further development of WCE, the main concern is the development of a highspeed telemetry system that is capable of transmitting high-resolution images at a higher frame rate, which is also a concern in the use of conventional endoscopy. A vital task for such a high-speed telemetry system is to be able to determine the path loss and how it varies in a radio channel in order to calculate the proper link budget. The hostile nature of the human body's channel and the complex anatomical structure of the GI tract cause remarkable variations in path loss at different frequencies of the system as well as at capsule locations that have high impacts on the calculation of the link budget. This paper presents the path loss and its variation in terms of system frequency and location of the capsule. Along with the guideline about the optimum system frequency for WCE, we present the difference between the maximum and minimum path loss at different anatomical regions, which is the most important information in the link-margin setup for highly efficient telemetry systems in next-generation capsules. In order to investigate the path loss in the body's channel, a heterogeneous human body model was used, which is more comparable to the human body than a homogenous model. The finite integration technique (FIT) in Computer Simulation Technology's (CST's) Microwave Studio was used in the simulation. The path loss was analyzed in the frequency range of 100 MHz to 2450 MHz. The path loss was found to be saliently lower at frequencies below 900 MHz. The smallest loss was found around the frequency of 450 MHz, where the variation of path loss throughout the GI tract was 29 dB, with a minimum of −9 dB and a maximum of −38 dB. However, at 900 MHz, this variation was observed to be 38 dB, with a minimum of −10 dB and a maximum of −48 dB. For most positions of the capsule, the path loss increased rapidly after 900 MHz, reaching its peak at frequencies in the range of 1800 MHz to 2100 MHz. During examination of the lower esophageal region, the maximum peak observed was −84 dB at a frequency of 1760 MHz. The path loss was comparatively higher during examination of anatomically-complex regions, such as the upper intestine and the lower esophagus as compared to the less complex stomach and upper esophagus areas.

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SENSITIVITY OF CELLULAR WIRELESS NETWORK PERFORMANCE TO SYSTEM & PROPAGATION PARAMETERS AT CARRIER FREQUENCIES GREATER THAN 2 GHz

Cited by 11 publications

References 29 publications

Development of a New Approach for High-Quality Quadrupling Frequency Optical Millimeter-Wave Signal Generation Without Optical Filter

Development of a New Approach for High-Quality Quadrupling Frequency Optical Millimeter-Wave Signal Generation Without Optical Filter

Minimum Cell Size for Information Capacity Increase in Cellular Wireless Network

The Use of a Human Body Model to Determine the Variation of Path Losses in the Human Body Channel in Wireless Capsule Endoscopy

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