SC-FDE

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

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.

Real-time transceiver implementation for SC-FDE acoustic modems

Abstract: We have developed a real-time underwater acoustic modem with single-carrier frequency domain equalization (SC-FDE) transmission. Channel estimation operates in the time domain to improve accuracy, and equalization operates in the frequency domain to reduce complexity. The system is implemented on the floating-point OMAPL138 platform. Through optimization in the algorithm and program scheduling, the high data rate and real-time performance of the modem is guaranteed. We have tested the designed system in a lake experiment in June 2016. At a distance of 5 km, the modem achieved real-time raw data rates of 9600 bps with uncoded bit-error rates of 10−3 in the complex environment.

On the Use of a Unique Word Structure for Linear Equalization in an SCIFDE System

Abstract: The concept of single carrier transmission with frequency domain equalization (SC/FDE) represents one of the most powerful strategies for next generation wireless communication systems. One of the main advantages of this concept, which makes use of a so called cyclic prefix (CP), is its powerful and low complexity equalization procedure in frequency domain. Topic of this paper is it to investigate the capabilities of the so called unique word (UW) for linear equalizer structures in an SC/FDE System. The concept of UW represents a specific form of cyclic prefix and was originally developed to enable non linear equalization as decision feedback equalization but was not investigated for linear structures. Therefore mathematical derivations are given in this paper to show of how to make use of the knowledge of the UW. Finally system simulations show the possible performance improvements.

MMSE channel estimation with LMS equalization for SC FDE systems

Abstract: Single-carrier frequency-domain equalization has been adopted as the uplink scheme for broadband high speed wireless communications, in contrast to OFDM for downlink communications. An efficient channel estimation technique is inevitable for any communication system in order to retrieve the transmitted data as such. The estimation can be done either by conventional method using training symbol or by blind estimation process. By combining the equalization along with the estimation process, the bit error rate can be reduced. In this paper, the conventional estimation and equalization method with the help of training data is considered. The results show that the estimation along with adaptive equalization yields better result than with one with estimation only.

On the Effect of Channel Estimation Errors in WL IB-DFE SC-FDE Systems for Interference Cancellation

Abstract: In this work, we analyze the effect of channel estimation errors on the bit error rate (BER) of a novel widely linear frequency domain iterative equalizer for single carrier systems under the effect of multiple interferences. It is shown through simulations that the error performance when using the proposed widely linear structure is better when compared to the regular widely linear one and the strictly linear versions.