Complex field network coding (CFNC) scheme offers a promising scheme to enable multiuser cooperative communication. In this paper, an error control coding is utilized in the CFNC scheme for multiuser cooperative commu...
详细信息
Complex field network coding (CFNC) scheme offers a promising scheme to enable multiuser cooperative communication. In this paper, an error control coding is utilized in the CFNC scheme for multiuser cooperative commu...
详细信息
ISBN:
(纸本)9781612843070
Complex field network coding (CFNC) scheme offers a promising scheme to enable multiuser cooperative communication. In this paper, an error control coding is utilized in the CFNC scheme for multiuser cooperative communications with regenerative relays. At both the regenerative relays and the destination, an iterative multiuser decoder is designed to enable iteration between the MAP-based detection of the multiuser signals and the soft-decision decoding of the error control coding scheme. Analysis and simulation results show that, the coded CFNC scheme is able to significantly improve the reliability of the multiuser message delivery in adverse cooperative communication environment.
A ZCZ-CDMA system which applies quasisynchronous system and uses a set of sequences with a zero correlation zone, called a ZCZ code, as a spreading code,can remove co-channel interference. This paper considers of a ZC...
详细信息
A ZCZ-CDMA system which applies quasisynchronous system and uses a set of sequences with a zero correlation zone, called a ZCZ code, as a spreading code,can remove co-channel interference. This paper considers of a ZCZ code with a good aperiodic autocorrelation property to be adapted to not only a spreading codes, but also pilot symbols for channel estimation.
This paper presents a ZCZ code which are combinedly used for spreading sequences and a synchronization symbol in quasisynchronous CDMA systems using PSK, ASK or BFSK. Furthermore a simple matched filter is presented, ...
详细信息
The problem of pilot assisted frequency offset estimation over flat-fading channel is investigated in this paper. By studying the pilot signal design and the generalized Crámer-Rao lower bound (CRLB), it is shown...
详细信息
ISBN:
(纸本)9781849191388
The problem of pilot assisted frequency offset estimation over flat-fading channel is investigated in this paper. By studying the pilot signal design and the generalized Crámer-Rao lower bound (CRLB), it is shown that the equivalent-preamble-postamble (EPP) pilot design is not optimal for the time-varying fading channel. Specifically, based on the numerical analysis and simulation results, it is unveiled that, the equally spaced pilot (ESP) design will outperform the EPP design when the spacing between pilot symbols is large enough owing to the 'spacing gain' on the effective signal-to-noise ratio (SNR), especially within slow fading region. In practical applications, the spacing gain from the reasonably devised pilot placement scheme could be transformed into the favorable saving in either the number of pilot symbols or the SNR for a targeted mean square error estimation performance.
暂无评论