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.
In this letter, a new blind partial transmit sequence (PTS) scheme in multi carrier code division multiple access (MC-CDMA) systems is proposed. Based on the analysis of the relationship between the dispreading property and side information, this proposed scheme divides the received signal into subblocks, and selects the set of phase factors which provides the maximum power of the combination of dispread...
In this paper, a low complexity joint spreading and inverse fast Fourier transform (S-IFFT) processing for multicarrier code-division multiple access (MC-CDMA) is introduced. Using the orthogonality transformation property of IFFT, the frequency domain spreading is applied during the IFFT processing for complexity reduction. Moreover, we propose a class of low complexity architecture for the uplink...
The high peak-to-average power ratio (PAPR) is one of the main drawbacks of multicarrier code division multiple access (MC-CDMA) system. To alleviate this problem, in this paper, we propose a novel user grouping scheme for PAPR reduction in the downlink of MC-CDMA. The basic principle is to partition the users into subgroups, and generate multiple alternatives to achieve considerable PAPR reduction...
High peak-to-average power ratio (PAPR) is one of the main drawbacks of MC-CDMA system. Among current methods that aim at reducing PAPR, partial transmit sequence (PTS) and variable code sets (VCS) are the kind of schemes that can improve PAPR statistics effectively but with large search complexity. To overcome this disadvantage, in this paper, we investigate a PAPR reduction scheme which employs...
The PAPR problem is one of the main drawbacks in MC-CDMA system. Variable Code Sets (VCS) can improve the PAPR property of the MC-CDMA signals. However, VCS technique requires an exhaustive search over the combinations of allowed spreading code sets. When the number of active users increases, the search complexity will increase exponentially. In this paper, we propose a low complexity VCS (LC-VCS)...
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.