A multi-band OFDM system for UWB communication

Balakrishnan, J.; Batra, A.; Dabak, A.G.

doi:10.1109/uwbst.2003.1267863

Cited by 128 publications

(60 citation statements)

References 2 publications

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“…For an antenna smaller than the reference geometry, m 0 should be ≥ 1. Now consider the equation set (1) and (2). Here again, we get, by observing the trends in the slopes of the lines connecting start and end points of each curve in these two equations, the ranges for the slopes of similar lines in smaller antennas.…”

Section: Inverse Parabolic Step Sequencementioning

confidence: 99%

“…Here again, we get, by observing the trends in the slopes of the lines connecting start and end points of each curve in these two equations, the ranges for the slopes of similar lines in smaller antennas. For an antenna smaller than our reference antenna, i.e., the Reflected IPSS antenna these slope ranges in order should be: As can be observed that there are only two type of functions, i.e., y = x 2 + α and y = τ √ x + θ alternating in both the equation sets (1) and (2). We can determine the length of the central feed from Equation (3) and by keeping its width in the prescribed range we can derive P 0 (x 0 , y 0 ) the coordinates of the initial point of the first curve.…”

Section: Inverse Parabolic Step Sequencementioning

confidence: 99%

“…Speeds which extend up to one Gbps, low power usage and minimum interference levels are the promising features. A 7.5 GHz spectrum, i.e., from 3.1 GHz to 10.6 GHz has been opened for UWB by the Federal Communications Commission (FCC) since 2002 [2] whereas European Commission has allowed 6.0 GHz to 8.5 GHz bandwidth.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Empirical Miniaturization Analysis of Inverse Parabolic Step Sequence Based Uwb Antennas

Saleem¹,

Brown²

2011

PIER

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Abstract-In this paper we develop an empirical approach to the design of Ultra Wideband (UWB) antennas employing the Inverse Parabolic Step Sequence (IPSS). The relationships developed can be used to miniaturize the antenna and achieve a good impedance match over the UWB bandwidth. The overall aim of this process is to give a good starting point for detailed numerical optimizations. We will illustrate the use of these formulae in three different designs of IPSSbased antennas. A low loss duroid substrate of loss tangent, tan δ, 0.0009, low relative permittivity 2.2 and thickness 1.575 mm is used to simulate these planar monopole antennas in Ansoft High Frequency Structure Simulator (HFSS).

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Section: Inverse Parabolic Step Sequencementioning

confidence: 99%

Section: Inverse Parabolic Step Sequencementioning

confidence: 99%

See 1 more Smart Citation

Empirical Miniaturization Analysis of Inverse Parabolic Step Sequence Based Uwb Antennas

Saleem¹,

Brown²

2011

PIER

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“…Its desired properties are as follows: 1) multipath energy can be efficiently captured with a single RF chain; 2) narrowband interference can be suppressed by adaptive selection of the subbands, thus achieving good coexistence properties in an uncoordinated environment; and 3) the requirement of frequency-switching time is not stringent. However, using an inverse fast Fourier transformer (IFFT), the transmitter is slightly complex [16].…”

Section: B Uwb Physical Layer Characteristicsmentioning

confidence: 99%

Medium Access Control in Ultra-Wideband Wireless Networks

Shen

Zhuang

Jiang

et al. 2005

IEEE Trans. Veh. Technol.

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Abstract-Ultra-wideband (UWB) transmission is an emerging wireless communication technology with unique potential merits such as high-rate, low-transmission power, immunity to multipath propagation, and capability in precise positioning. It has received significant interests for future wireless communications from both academia and industry. In UWB wireless networks, medium access control (MAC) is essential to coordinate the channel access among competing devices. The unique UWB characteristics not only pose significant challenges but also offer great opportunities in efficient UWB MAC design. This paper presents a comprehensive overview of UWB MAC development on four important aspects: multiple access, overhead reduction, resource allocation, and quality of service (QoS) provisioning, and identifies some future research issues.Index Terms-Medium access control (MAC), quality of service (QoS), resource allocation, ultra-wideband (UWB) transmission, wireless personal area network (WPAN).

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“…Later, two distinct techniques were envisaged: the Multi-band Orthogonal Frequency Division Multiplexing (MB-OFDM) and the Impulse-UWB (I-UWB) [2]. The MB-OFDM divides the UWB spectrum in 14 subbands, the utilization of the bands is managed for a code time-frequency exploiting the spatial-temporal diversity [3], while the I-UWB transmits pulses of very short duration that occupy the entire allowable frequency band [4]. UWB has vast array of applications in wireless world.…”

Section: Introductionmentioning

confidence: 99%