An adaptive UWB modulation scheme for optimization of energy, BER, and data rate

August, N.J.; Thirugnanam, R.; Ha, Dong Sam

doi:10.1109/uwbst.2004.1320960

Cited by 16 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For M-ary PPM, signal amplitude so that (1) can be written as (2) The received signal can be modeled as: (4) where is AWGN noise with power spectral density , is the propagation delay for the th user, is the received pulse waveform. PPM receiver uses bank of M correlation receivers followed by a detector.…”

Section: Signal and System Modelmentioning

confidence: 99%

See 1 more Smart Citation

Adaptive time hopping PPM UWB multiple access communication schemes

Biradar

Merchant

Desai

2007

2007 International Symposium on Communications and Information Technologies

View full text Add to dashboard Cite

Abstract-Typical Ultra Wide Band (UWB) systems are built to meet Quality of service (QoS) constraints under multiple access environment. We propose a UWB physical layer that adapts its number of time hops to efficiently meet QoS requirements. The proposed adaptive UWB uses side information to know the current QoS and adjusts its number of time hops accordingly. The system employs adaptive Time Hopping Pulse Position Modulation (TH-PPM). The bit error rate (BER) performance is evaluated under additive white Gaussian noise with multiple access communication.

show abstract

Section: Signal and System Modelmentioning

confidence: 99%

“…Reference [4] proposed adaptive M-ary PPM modulation for optimization interms of data rate and energy to meet QoS requirements. In this paper, we propose a new scheme adaptive TH-UWB, which adapts its number of hops depending on the required bit error rate (BER) in multiple access communication under additive white Gaussian noise (AWGN).…”

Section: Introductionmentioning

confidence: 99%

Adaptive time hopping PPM UWB multiple access communication schemes

Biradar

Merchant

Desai

2007

2007 International Symposium on Communications and Information Technologies

View full text Add to dashboard Cite

show abstract

“…Otherwise, herein we investigate the combination between two link adaptation approaches based on MCS of the physical layer joint with HARQ type I of the data link layer into the MB-UWB systems. It should be mentioned that few contributions discuss link adaptation into MB-UWB systems [4]. ECMA-368 proposes various data rates for MB-UWB systems without explaining the interaction between them.…”

Section: Introductionmentioning

confidence: 99%

Energy Expenditure Per Bit Minimization Into Mb-Ofdm Uwb Systems

Chihi¹,

Zaeem²,

Bouallègue³

2017

IJDIWC

View full text Add to dashboard Cite

The growing demand of high data rates requires much energy consumption. For this, in this paper we examine energy efficiency (EE) through total energy expenditure per bit characterization when the joint coupling between Modulation and Coding Scheme (MCS) related to the physical layer and Selective Repeat (SR) truncated Hybrid Automatic Repeat reQuest (HARQ) type I protocol of data link layer is performed into Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra-Wideband (UWB) system. The optimization is based on total energy expenditure per bit diminishing constrained by MCS rate and Packet Error Rate (PER). We propose an algorithm to identify the optimal MCS rate basing on dichotomy policy. Thus, analytical analysis highlights a closed-form expression of the optimal MCS rate allowing energy per bit minimization. In addition, in measuring the energy consumption per useful information the hardware components of MB-OFDM UWB (MB-UWB) crosslayer structure are considered. Further, the analytical framework is validated through computer results which reveal the effectiveness of our method in terms of energy saving.

show abstract

“…However, they are not suitable for MB-OFDM UWB systems, where the same modulation scheme is employed for all the subcarriers. There are only a few papers, such as [4] and [5], investigating the AMC technique for UWB systems. However, how to implement rate adaption for MB-OFDM UWB systems following the ECMA-368 standard is still an open problem.…”

Section: Introductionmentioning

confidence: 99%

Hybrid ARQ with Rate Adaptation in Multiband OFDM UWB Systems

Wang

Ryu

Chen

et al. 2009

2009 IEEE International Conference on Communications

View full text Add to dashboard Cite

Abstract-In this paper, we propose a cross-layer design (CLD) scheme combining rate adaptation and four types of hybrid automatic repeat request (HARQ) for multiband orthogonal frequency division multiplexing (MB-OFDM) ultra wideband (UWB) systems following the ECMA-368 standard. The time varying property is incorporated into standard UWB channel models for the purpose of investigating rate adaptation. To accurately accommodate fast time-varying channel conditions, we propose to embed the selected rate information into the acknowledgement (ACK) frames. It is shown that the proposed CLD scheme combining rate adaptation and HARQ can provide higher throughput than the HARQ-only schemes. Among the four types of HARQ schemes, HARQ Type-III has the best throughput performance while Type I has the worst.

show abstract

An adaptive UWB modulation scheme for optimization of energy, BER, and data rate

Cited by 16 publications

References 16 publications

Adaptive time hopping PPM UWB multiple access communication schemes

Adaptive time hopping PPM UWB multiple access communication schemes

Energy Expenditure Per Bit Minimization Into Mb-Ofdm Uwb Systems

Hybrid ARQ with Rate Adaptation in Multiband OFDM UWB Systems

Contact Info

Product

Resources

About