SC-FDE

About: SC-FDE is a research topic. Over the lifetime, 438 publications have been published within this topic receiving 7547 citations.

A Joint Coded Two-Step Interference Cancellation Technique for a Multiuser MIMO-SC-FDE System

Abstract: In this paper, we present a transceiver design for a broadband multiuser-MIMO communication system, where the co-channel users are equipped with multiple transmit and multiple receive antennas. In particular, we propose a joint coded two-step interference cancellation scheme which effectively combats the effect of co-channel interference (CCI) and inter-symbol interference (ISI) in multipath channels. To overcome the peak-to-average-power ratio limitation of multicarrier systems, the scheme employs single-carrier frequency-domain equalization (SC-FDE) based modulation combined with time-reversed space-time block codes (TR-STBC). The receiver performs minimum mean-squared error (MMSE) interference suppression at the first stage, and then, CCI cancellation is implemented with a bank of single-user channel decoders. Also, forward error correction outer convolutional encoding, and random bit interleaving are used to correct the carrier in deep fades. To verify the utility of the proposed approach, the paper also includes two sets of average symbol error rate simulations for two different channel models. The first set is for a frequency selective quasi-static fading channel while the secondset is for a Rayleigh fading channel modeled by a modified Jakes' model, both of which confirm the advantage of the proposed scheme.

Efficient Channel Estimation for Iterative MIMO SC-FDE Systems

Abstract: SC modulations (Single-Carrier) with FDE (Frequency-Domain Equalization) are promising candidates for future broadband MIMO (Multiple Input, Multiple Output) wireless systems. These modulations allow excellent performances in severely time-dispersive channels, provided that accurate channel estimates and performing decoding algorithms are available at the receiver. For this purpose, pilot symbols and/or training sequences are usually multiplexed with data symbols. However, since this leads to overhead and some spectral degradation, the use of implicit pilots (i.e., pilots superimposed to data) should be considered. In this paper we consider MIMO SC-FDE systems where the channel estimation is based on either explicit or implicit pilots. Since the interference levels between data and pilots might be very high (for the implicit bits), we propose an iterative receiver with joint equalization, turbo decoding and channel estimation. Our performance results show that the use of implicit pilots, combined with the proposed receiver, allows performances close to the case with perfect channel estimation, even for severely time-dispersive channels.

A Receive Space Diversity Scheme for MIMO-SC/FDE Systems Based on Space-Time Block Coding

Abstract: This paper proposes a receive space diversity scheme based on space-time block coding for Single-Carrier block transmission system employing Frequency Domain Equalization (SC/FDE), which can remedy the Huang's (2004) system performance degradation, and can also reduce the number of IDFT blocks. It can further increase data transmission rate through properly designing the space-time codes. A detailed procession for SC/FDE systems using space-time block coding is given, and the performances between the proposed SC/FDE-MIMO system and the MIMO-OFDM system are compared; effective benefits can be shown in the simulations.

Study on a dual-mode blind equalization algorithm in the Single-Carrier system with Frequency-Domain Equalization

Abstract: The ISI (Inter-Symbol Interference) caused by channel fading and multi-path propagation challenges the efficiency and availability over the wireless digital communication. SC-FDE (Single-Carrier Frequency-Domain Equalization) is commended as one of valid methods to overcome ISI. In recent years, the research on SC-FDE develops quickly. This paper takes a study on a dual-mode (DD-LMS+MCMA) blind equalization algorithm applied in a single-carrier system. This algorithm can decrease the complicity of system, improve the convergence and diminish the steady state error compared with the multi-carrier system. Finally, it shows better channel tracking capability.