SC-FDE

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

SC-FDE system signal detection method based on adaptive integrated deep learning model

Abstract: The invention relates to a signal detection method based on an adaptive integrated deep learning model. An integrated long short term memory (LSTM) neural network is adopted to replace a channel estimation and frequency domain equalization part of a receiving end of an SC-FDE system in an end-to-end mode. The data set required for training the LSTM neural network is composed of the characteristicsof the received signals extracted by the receiving end and the labels distributed to the constellation diagram corresponding to the modulation mode used by the sending end. In order to ensure the reliability of the system, a linear discriminant analysis (LDA) algorithm is adopted to reduce the dimension of the feature information, and the multi-dimensional feature information is used as the inputof the integrated model. In order to improve the adaptability of the system, the signal power of different sub-channels is adopted as an adaptive factor, and adaptive integration is carried out on the output of each sub-carrier at the network output end. According to the method, for different communication systems, only the data set needs to be generated according to the used system framework, the model obtained through training is used for replacing a certain part of the communication system, and high generalization is achieved.

Channel estimation in single-carrier frequency domain equalization system

Abstract: The paper introduces the principle of SC_FDE system based on IEEE 80216a and channel estimation in SC_FDE system,and shows simulation results with LS algorithm

AMC (Adaptive Modulation and Coding) method based on SC-FDE (Single Carrier-Frequency Domain Equalization) system

Abstract: The invention provides an AMC (Adaptive Modulation and Coding) method based on an SC-FDE (Single Carrier-Frequency Domain Equalization) system, relates to an AMC modulation and encoding method, and belongs to the field of wireless radio. In order to solve the problems that the a channel cost is increased and the spectrum efficiency is low under the condition that the SC-FDE system is at a time-varying multi-path channel, caused by that a channel needs to be subjected to estimation and policy exchange at any time when current information is transmitted, the invention provides the adaptive modulation and coding method by combining an AMC technology and self characteristics of an SC-FDE system theory; policy lasting time is introduced to restrict the utilization time of the policy and the switching frequency of the policy, so that the optimal policy which is matched with the current channel state is searched in a policy switching table; only if the average lasting time of the selected optimal policy is exceeded, the method can carry out the next time of the selection and the switching of the optimal transmission policy, so that the channel estimation and policy switching processing efficiencies are reasonably reduced, the spectrum efficiency is effectively improved and the system throughput is maximized. The AMC method based on the SC-FDE system is applicable to the field of a wireless radio communication technology.

Enhanced Log-Likelihood Ratio Calculation for LDPC Coded SC-FDE Systems in 60-GHz Millimeter-Wave WLAN/WPAN

Abstract: Single-carrier frequency domain equalization (SC-FDE) has been standardized as an alternative of orthogonal frequency division multiplexing (OFDM) in IEEE 802.11ad and 802.15.3c. In addition, with the use of low density parity-check (LDPC) codes, multi-Giga bits transmission can be supported in 60-GHz millimeter-wave (mmW) WLAN/WPAN with desired decoding complexity. In this paper, we present and evaluate an enhanced log-likelihood ratio (LLR) calculation method to facilitate the LDPC decoding in SC-FDE. In contrast to the virtual channel (VC) based LLR calculation approach (i.e., the Unique Word (UW) tracking scheme), our proposed method exhibits better bit error rate (BER) performance, and is more spectrally efficient.

High-speed Underwater Acoustic Communication Based on Single Carrier with Frequency Domain Equalization

Abstract: Cyclic prefixed single carrier transmission with frequency domain equalization (SC-FDE) for high-speed phase coherent underwater acoustic (UWA) communication was proposed. The system performance of SC-FDE over an UWA channel model was analyzed, simulated and compared with that of single carrier time domain adaptive DFE equalization embedded second order digital phase locked-loop and orthogonal frequency division multiplexing (OFDM) based UWA communication. The impact of diversity on the performance of SC-FDE in UWA was studied. The numerical simulation results show performance advantage of the SC-FDE scheme, such as low receiver complexity, computation and the ability of compensate phase offset and frequency selective fading.