The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Sparse code multiple access (SCMA) is a nonorthogonal multiple access scheme based on a multi-dimensional codebook with sparse codewords. The sparsity property of SCMA allows the receiver to take advantage of low-complexity message passing algorithm (MPA) detector with maximum likelihood (ML)-like performance. The use of multiple antennas at the SCMA receiver will improve the detection performance...
When using a high power amplifier(HPA) for high-speed communication, the nonlinear characteristics of the HPA cause power efficiency, bit error rate(BER) performance, and spectral efficiency to deteriorate. Since it is inevitable to use HPA to obtain sufficient transmission power for high-speed communication, it is necessary to compensate for nonlinearity of HPA by using a predistorter. In this paper,...
This paper proposes a blind interleaver period estimation algorithm by sorting error-less symbols. After finding the error-less symbols through the rank distribution of the square matrices, we construct a rectangular matrix by locating errorless symbols on the top of a matrix. By analyzing this matrix, we can estimate the interleaver period. Experimental results show that the proposed algorithm has...
An offset quadrature amplitude modulation (OQAM)-filterbank based multicarrier (FBMC) has been attracted and nominated as one of new waveforms for 5G communications due to its capability of frequency selectivity, robustness to carrier frequency offset (CFO) and omission of cyclic prefix (CP). Regardless of these advantages, many researchers have claimed pros and cons for the usage of FBMC, among those...
In order to address a wide variety of future requirements, Generalized Frequency Division Multiplexing (GFDM), a non-orthogonal multicarrier scheme, is considered as one of the most promising techniques available today. To improve the orthogonality of the conventional GFDM system, a multi-taper implementation of GFDM (MGFDM) using discrete prolate spheroidal sequences (DPSSs) or multi-tapers, which...
In recent years, a new communication technology emerged by taking advantage of the high-speed switching capabilities of LED known as VLC (Visible Light Communication) has been getting more attention. On the other hand, OFDM is one of the technology that can efficiently utilize a frequency band. In this paper, our goal is to develop a VLC OFDM system, that is easily operable, and capable of high speed...
In this paper, we propose a clipping method for an adaptive QR decomposition (QRD)-M algorithm in multiple-input multiple-output (MIMO) systems. To reduce the computational complexity without a significant bit error rate (BER) degradation, the proposed algorithm eliminates unreliable candidate symbols using a clipping parameter. Particularly, in a low signal-to-noise ratio (SNR) regime, the proposed...
In this paper, a generalized OFDM (G-OFDM) which protects the out of band (OOB) leakage and satisfies the orthogonality between subcarriers is proposed for next generation wireless communications. This scheme maps many data symbols to many subchannels through filter matrix, unlike the conventional OFDM that maps a data symbol to a subchannel in a one-to-one fashion. In G-OFDM, the filter matrix is...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.