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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20 Jun 2004
TL;DR: In this article, the authors investigate the meaning of decision feedback equalization for a single carrier system with frequency domain equalization in an overall system approach, based on the parameters of the IEEE 802.11a standard.
Abstract: In this work we investigate the meaning of decision feedback equalization for a single carrier system with frequency domain equalization (SC/FDE) in an overall system approach, based on the parameters of the IEEE 802.11a standard. The concept of SC/FDE allows an advantageous combination of feed forward frequency domain equalization and feed back equalization in the time domain, that combines low signal processing complexity and powerful equalization. Although the concept of decision feedback equalization (DFE) is a well known and developed theory, this nonlinear equalization is rarely investigated in an overall system approach. Based on that the possible performance gain will be characterized under the constraints of channel characteristics, error propagation, higher order modulation schemes and channel coding. It will be demonstrated that these elements have significant influence on the possible performance of DFE and may reduce the propagated high performance gain.
11 citations
TL;DR: This letter designs iterative receiver algorithms for joint frequency-domain equalization and decoding in a single carrier system assuming perfect channel state information and proposes two receiver algorithms with, respectively, parallel and sequential message-passing schedules in the MF part.
Abstract: In this letter, we design iterative receiver algorithms for joint frequency-domain equalization and decoding in a single carrier system assuming perfect channel state information. Based on an approximate inference framework that combines belief propagation (BP) and the mean field (MF) approximation, we propose two receiver algorithms with, respectively, parallel and sequential message-passing schedules in the MF part. A recently proposed receiver based on generalized approximate message passing (GAMP) is used as a benchmarking reference. The simulation results show that the BP-MF receiver with sequential passing of messages achieves the best BER performance at the expense of higher computational complexity compared to that of the GAMP receiver. The parallel BP-MF receiver has complexity similar to that of GAMP, but its low convergence rate yields poor performance, especially under high signal-to-noise ratio conditions.
11 citations
TL;DR: A comparison of pre and post-processing methodology, using the same algorithms for the use of massive multiple input, multiple output (MIMO) combined with single-carrier with frequency-domain equalization (SC-FDE) modulations, associated to millimeter wave (mm-Wave) communications using precoding.
11 citations
09 Jun 2013
TL;DR: Comprehensive simulations indicate that the proposed architecture employing the proposed ITR-PNC achieves competitive bit-error-rate (BER) performance with only two iterations, for the cases whether only RPN or both TPN and RPN are taken into consideration.
Abstract: Due to the extremely high oscillation frequency of 60 GHz systems, phase noise (PN) imported at both transmitter (Tx) and receiver (Rx) is significant, which degrades the transmission performance. This paper proposes an architecture employing iterative Tx and Rx PN compensation (ITR-PNC) for 60 GHz systems with single-carrier frequency-domain equalization (SC-FDE) transmission. The ITR-PNC iteratively performs PNC before equalization (PNC-BE) and PNC after equalization (PNC-AE), which are mainly set to manage Rx PN (RPN) and Tx PN (TPN), respectively. The PNC-BE and PNC-AE both exploit the one-tap least mean square (LMS) algorithm for PN extraction (PNE). In PNC-AE, the decision feedback result is used as the reference signal for PNE. And in PNC-BE, the reference signal is the signal replica, which is generated via the decision result and the estimated TPN of last iteration, and the estimated channel response. Comprehensive simulations indicate that the proposed architecture employing the proposed ITR-PNC achieves competitive bit-error-rate (BER) performance with only two iterations, for the cases whether only RPN or both TPN and RPN are taken into consideration.
11 citations
26 Jun 2006
TL;DR: Simulation results show that when partial CSI is utilized, SC-FDE systems can achieve much higher spectral efficiency than coded OFDM; if both SC- FDE and OFDM systems use one bit CSI per-subchannel, SC -FDE outperforms OFDM obviously.
Abstract: Single carrier with frequency domain equalization (SC-FDE) has been adopted by IEEE 802.16 standard as an alternative technique of orthogonal frequency division multiplexing (OFDM) in physical layer. Reference [1] proposed the SC-FDE system utilizing channel state information (CSI), which can improve the performance through transmitting information on available frequency-domain subchannels; that is, a part of spectrum in the system proposed in [1] is left unused. This paper compares the spectral efficiency of OFDM and SC-FDE, and gives some simulation results under IEEE 802.16 scenario [3]. Simulation results show that when partial CSI is utilized, SC-FDE systems can achieve much higher spectral efficiency than coded OFDM; if both SC-FDE and OFDM systems use one bit CSI per-subchannel, SC-FDE outperforms OFDM obviously.
11 citations