Topic
SC-FDE
About: SC-FDE is a research topic. Over the lifetime, 438 publications have been published within this topic receiving 7547 citations.
Papers published on a yearly basis
Papers
More filters
1 citations
Posted Content•
TL;DR: Two adaptive detection schemes based on single-carrier frequency domain equalization for multiuser direct-sequence ultra-wideband (DS-UWB) systems are proposed, which are termed structured channel estimation (SCE) and direct adaptation (DA).
Abstract: In this paper, we propose two adaptive detection schemes based on single-carrier frequency domain equalization (SC-FDE) for multiuser direct-sequence ultra-wideband (DS-UWB) systems, which are termed structured channel estimation (SCE) and direct adaptation (DA). Both schemes use the minimum mean square error (MMSE) linear detection strategy and employ a cyclic prefix. In the SCE scheme, we perform the adaptive channel estimation in the frequency domain and implement the despreading in the time domain after the FDE. In this scheme, the MMSE detection requires the knowledge of the number of users and the noise variance. For this purpose, we propose simple algorithms for estimating these parameters. In the DA scheme, the interference suppression task is fulfilled with only one adaptive filter in the frequency domain and a new signal expression is adopted to simplify the design of such a filter. Least-mean squares (LMS), recursive least squares (RLS) and conjugate gradient (CG) adaptive algorithms are then developed for both schemes. A complexity analysis compares the computational complexity of the proposed algorithms and schemes, and simulation results for the downlink illustrate their performance.
1 citations
25 Jun 2006
TL;DR: The adaptive method can eliminate the damage caused by frequency selectivity and time selectivity at the same time so it can be used in fast fading multipath channels and needs the support of backward channel but the overhead of feedback information is little.
Abstract: In this paper, a new method of channel state information (CSI) utilization for single carrier with frequency domain equalization (SC-FDE) system is proposed. The adaptive method can eliminate the damage caused by frequency selectivity and time selectivity at the same time so it can be used in fast fading multipath channels. The adaptive method needs the support of backward channel but the overhead of feedback information is little because only one bit is needed for each subcarrier. The simulation result shows the adaptive method has good performance in fast fading multipath channels even if the Doppler frequency is 300 Hz
1 citations
Patent•
02 May 2012
TL;DR: In this article, a design method of an HARQ (Hybrid Automatic Repeat-request) communication way applied to SC-FDE (Signal Carrier Frequency Domain Equalization) baseband system baseband is described.
Abstract: The invention relates to a design method of an HARQ (Hybrid Automatic Repeat-request) communication way applied to SC-FDE (Signal Carrier Frequency-Domain Equalization) baseband system baseband system. The design method is characterized by comprising the following steps of: on the premise of a forward correction communication way of the common SC-FDE baseband system, analyzing defects of the system; then combining a technical principle related to the HARQ, taking a super-frame as a unit and transmitting data information of each frame into a signal channel decoding part of a receiving end to be judged; if finding that errors cannot be corrected, executing an instruction for repeatedly transmitting the data at the next moment; and otherwise, avoiding transmitting the data again and continually carrying out the transmission of the next frame. According to the invention, the design scheme of the system combining the SC-FDE and the HARQ technologies takes suitable reduction of a system throughput as the cost to obtain a lower error rate of the system, so that the received data become more accurate.
1 citations
01 Dec 2010
TL;DR: The results prove that the proposed pilot interval design is finally practicable, and the experiential value of the optimal pilot interval is given, and is provided reference for engineering design.
Abstract: This paper investigates the effects of pilot interval design on linear interpolated channel estimation in single carrier frequency domain equalization(SC-FDE) system. Based on the properties of noise accumulation and fading channel correlation, the optimal pilot interval design is proposed. Simulations are finished over the four-ray Rayleigh channel, and the results prove that the proposed method is finally practicable. The experiential value of the optimal pilot interval is given, and is provided reference for engineering design.
1 citations