Results 51 to 60 of about 4,812 (181)
Layered Steered Space–Time-Spreading-Aided Generalized MC DS-CDMA
, 2010 —We present a novel trifunctional multiple-input– multiple-output (MIMO) scheme that intrinsically amalgamates space–time spreading (STS) to achieve a diversity gain and a Vertical Bell Labs layered space–time (V-BLAST) scheme to attain a multiplexing ...
Alamri, Osamah +3 more
core +1 more source
Subcarrier and Power Allocation for LDS-OFDM System [PDF]
, 2011 Low Density Signature-Orthogonal Frequency Division Multiplexing (LDS-OFDM) has been introduced recently as an efficient multiple access technique. In this paper, we focus on the subcarrier and power allocation scheme for uplink LDS-OFDM system.
AL-Imari, Mohammed +3 more
core +1 more source
Generalized multicarrier DS-CDMA using various chip waveforms [PDF]
2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003., 2004 In this contribution the family of generalized multicarrier DS-CDMA (MC DS-CDMA) schemes is investigated, when considering time-domain half-sine and raised-cosine chip waveforms, in addition to the rectangular chip waveform. Our results show that for a given subcarrier spacing the particular choice of the chip waveform has a substantial influence on ...
Yang, L-L., Hanzo, L.
openaire +2 more sources
Sensitivity of Multicarrier Two-Dimensional Spreading Schemes to Synchronization Errors
EURASIP Journal on Wireless Communications and Networking, 2008 This paper presents the impact of synchronization errors on the performance of a downlink multicarrier two-dimensional spreading OFDM-CDMA system. This impact is measured by the degradation of the signal to interference and noise ratio (SINR) obtained ...
Ros Laurent +3 more
doaj +2 more sources
Modified Three‐Dimensional Multicarrier Optical Prime Codes
International Journal of Optics, Volume 2016, Issue 1, 2016., 2016 We propose a mathematical model for novel three‐dimensional multicarrier optical codes in terms of wavelength/time/space based on the prime sequence algorithm. The proposed model has been extensively simulated on MATLAB for prime numbers (P) to analyze the performance of code in terms of autocorrelation and cross‐correlation.
Rajesh Yadav +2 more
wiley +1 more source
Spectral Efficiency Comparison of OFDM and MC-CDMA with Carrier Frequency Offset [PDF]
Radioengineering, 2017 Inter-carrier interference and multiple access interference due to carrier frequency offset (CFO) are two major factors that deteriorate the performance of orthogonal frequency division multiple access (OFDMA) and multicarrier code division multiple ...
J. Ahmed
doaj
EXIT-charts-aided hybrid multiuser detector for multicarrier interleave-division multiple access [PDF]
, 2010 A generically applicable hybrid multiuser detector (MUD) concept is proposed by appropriately activating different MUDs in consecutive turbo iterations based on the mutual information (MI) gain.
Chen, Sheng +3 more
core +2 more sources
Multi-code Multicarrier CDMA: Performance Analysis
Journal of Communications Software and Systems, 2006 A new multi-code multicarrier code division multiple access (MC-MC-CDMA) system is proposed and analyzed in afrequency selective fading channel. By allowing each user to transmit an M-ary code sequence, the proposed MC-MC-CDMA system can support various ...
Taeyoon Kim +3 more
doaj
Blind Joint Soft-Detection Assisted Slow Frequency-Hopping Multicarrier DS-CDMA [PDF]
, 2000 A novel multiple-access scheme based on slow frequency-hopping multicarrier direct-sequence, code-division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrow-band ...
Hanzo, L., Yang, L-L.
core +1 more source
EURASIP Journal on Advances in Signal Processing, 2005 The performance of multicarrier systems is highly impaired by intercarrier interference (ICI) due to frequency synchronization errors at the receiver and by intermodulation distortion (IMD) introduced by a nonlinear amplifier (NLA) at the transmitter ...
Rugini Luca, Banelli Paolo
doaj +1 more source