Topic
SC-FDE
About: SC-FDE is a research topic. Over the lifetime, 438 publications have been published within this topic receiving 7547 citations.
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TL;DR: A p-persistent Network Diversity Multiple Access (NDMA) random MAC protocol designed to cope with a total number of mobile terminals J, for a maximum decoding capability of Qmax simultaneous packets is proposed and evaluated.
Abstract: This paper presents a Medium Access Control (MAC) protocol solution designed to properly handle collisions when in the presence of a multi-packet detection receiver for Single-Carrier (SC) modulations with Frequency-Domain Equalization (FDE). It is considered an iterative frequency-domain receiver that jointly performs equalization, multi-packet separation and channel decoding operations, for up to Qmax mobile terminals transmitting in one slot. In this work, it is proposed and evaluated a p-persistent Network Diversity Multiple Access (NDMA) random MAC protocol designed to cope with a total number of mobile terminals J, for a maximum decoding capability of Qmax simultaneous packets. An accurate analytical model is presented to optimize two different scenarios: in the first one, a saturated network is considered and it is determined the packet transmission probability that maximizes the uplink throughput; the second represents a non-saturated network and the goal is to compute the optimal transmission probability associated to each mobile terminal that minimizes the packet transmission delay. In the end, analytical results obtained through physical and MAC layer simulations are discussed.
1 citations
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01 Jan 2005TL;DR: Results show that the proposed TDMA scheme can effectively eliminate the error floor in CDMA due to insufficient CP, and it is more efficient to accommodate larger number of users than CDMA in high data rate transmission.
Abstract: We propose a time division multiple access (TDMA) scheme for the BPSK modulated single carrier block transmission with frequency domain equalization (SC-FDE) over ultra-wideband (UWB) communications. The transmitter and receiver matrices for the proposed TDMA SC-FDE system are derived to achieve the multiple access interference (MAI) free and interblock-interference (IBI) free transmission without the insertion of cyclic prefix (CP) between blocks, circumventing the need for long CP and large FFT size in high speed UWB communications. The performance of the proposed TDMA SC-FDE system over UWB channels is investigated and compared with that of the block spread code division multiple access (CDMA) scheme. The effects of oversampling diversity and imperfect channel estimation are also investigated. Results show that the proposed TDMA scheme can effectively eliminate the error floor in CDMA due to insufficient CP, and it is more efficient to accommodate larger number of users than CDMA in high data rate transmission
1 citations
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16 May 2009TL;DR: A novel synchronization method is proposed in this paper, which adopts new structure of training symbols and new calculation method and has good estimation performance over time-variant fading channels.
Abstract: Owing to SC-FDE (single carrier with frequency domain equalization) systems perform equalization in frequency domain, carrier frequency synchronization and timing synchronization are the most important preconditions. A novel synchronization method is proposed in this paper, which adopts new structure of training symbols and new calculation method. Simulation results demonstrate that the proposed method has good estimation performance over time-variant fading channels.
1 citations
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26 Jun 2006TL;DR: This paper discusses the channel estimation schemes for that system, especially in timevariant environments, and some simulations are shown under IEEE 802.11a and IEEE802.16 scenarios.
Abstract: Single carrier with frequency domain equalization (SC-FDE) utilizing channel state information (CSI) has been proposed in [1]. This paper discusses the channel estimation schemes for that system, especially in timevariant environments. Some simulations are shown under IEEE 802.11a [2] and IEEE 802.16 [3] scenarios.
1 citations
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TL;DR: In this article, the performances of cyclic delay diversity and phase rolling techniques for SC-FDE (Single Carrier with Frequency Domain Equalization) systems with multiple transmit antennas assuming time-flat and frequency-flat channels.
Abstract: This paper compares the performances of cyclic delay diversity and phase rolling techniques for SC-FDE(Single Carrier with Frequency Domain Equalization) systems with multiple transmit antennas assuming time-flat and frequency-flat channels. In OFDM(Orthogonal Frequency Division Multiplexing) systems generation of time varying channels using phase rolling can result in performance gains comparable to those of frequency-selective channels made by cyclic delay diversity However, in SC-FDE systems making time-selective channels may produce better results than creation of frequency-selective channels.
1 citations