Proceedings ArticleDOI
SC-FDE with soft packet combining ARQ techniques for interference-limited UWB systems
Rui Dinis,Paulo Carvalho,M. Martins +2 more
- pp 1-6
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TLDR
UWB (Ultra Wide Band) systems employing SC-FDE techniques in the presence of strong interference signals that occupy a significant part of the transmission band are considered and a suitable soft combining ARQ schemes are proposed.Abstract:
SC-FDE (Single-Carrier with Frequency-Domain Equalization) together with soft packet combining ARQ techniques (Automatic Repeat reQuest) was shown to be effective for broadband wireless systems with deep fading effects such as those inherent to shadowing. However, they are not suitable to cope with strong interference effects, especially when the channel remains fixed. In this paper, we consider UWB (Ultra Wide Band) systems employing SC-FDE techniques in the presence of strong interference signals that occupy a significant part of the transmission band and we propose suitable soft combining ARQ schemes. Our techniques are able to cope with strong interference levels as well as deep fading, even for fixed channels.read more
Citations
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Journal ArticleDOI
Analytical BER and PER Performance of Frequency-Domain Diversity Combining, Multipacket Detection and Hybrid Schemes
TL;DR: An analytical model is proposed to compute the BER and PER of DC, MPD and hybrid techniques, considering a Single-Carrier with Frequency-Domain Equalization (SC-FDE) scenario and two frequency-domain detection methods: a simple linear receiver and a powerful iterative receiver.
Dissertation
Time diversity solutions to cope with lost packets
TL;DR: In this article, a dissertation submitted to the Departamento de Engenharia Electrotecnica of Faculdade de Ciencias e Tecnologia of Universidade Nova de Lisboa in partial fulfilment of the requirements for the degree of Doctor of Philosophy was presented.
Proceedings ArticleDOI
Analytical Evaluation of Iterative Packet Combining and Multipacket Detection Schemes for SC-FDE
TL;DR: The paper presents an analytical tool to obtain the Bit Error Rate (BER) and Packet Error rate (PER) performances for Packet Combining (PC), Multipacket Reception (MPR) and the hybrid of both schemes, based on Iterative Block Decision Feedback Equalization (IB-DFE) receivers for Single-Carrier with Frequency-Domain equalization (SC-FDE).
Journal ArticleDOI
On the use of frequency-domain cross-layer diversity techniques to cope with lost packets
TL;DR: Two time diversity approaches to cope with lost packets are analyzed: a low-complexity diversity combining ARQ scheme (Automatic Repeat reQuest) employed in a TDMA (Time Division Multiple Access) architecture; and a Network Diversity Multiple Access (NDMA), which is a multi-packet reception approach able to separate multiple mobile terminals transmitting simultaneously in one slot using temporal diversity.
References
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Journal ArticleDOI
Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications
Moe Z. Win,Robert A. Scholtz +1 more
TL;DR: Performance of time-hopping spread-spectrum multiple-access systems employing impulse signal technology for both analog and digital data modulation formats under ideal multiple- access channel conditions is estimated.
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Frequency domain equalization for single-carrier broadband wireless systems
TL;DR: This article surveys frequency domain equalization (FDE) applied to single-carrier (SC) modulation solutions and discusses similarities and differences of SC and OFDM systems and coexistence possibilities, and presents examples of SC-FDE performance capabilities.
Journal ArticleDOI
Impulse radio: how it works
Moe Z. Win,Robert A. Scholtz +1 more
TL;DR: The characteristics of impulse radio using a modulation format that can be supported by currently available impulse signal technology are described and analytical estimates of its multiple- access capability under ideal multiple-access channel conditions are given.
Journal ArticleDOI
Rate-compatible punctured convolutional codes (RCPC codes) and their applications
TL;DR: In this article, the concept of punctured convolutional codes is extended by punctuating a low-rate 1/N code periodically with period P to obtain a family of codes with rate P/(P+l), where l can be varied between 1 and (N-1)P. This allows transmission of incremental redundancy in ARQ/FEC (automatic repeat request/forward error correction) schemes and continuous rate variation to change from low to high error protection within a data frame.
Journal Article
Rate-compatible punctured convolutional codes (RCPC codes) and their applications
TL;DR: The concept of punctured convolutional codes is extended by punctuating a low-rate 1/N code periodically with period P to obtain a family of codes with rate P/(P+l), where l can be varied between 1 and (N-1)P.