Results 101 to 110 of about 5,755 (223)

Receiver Multiuser Diversity Aided Multi-Stage MMSE Multiuser Detection for DS-CDMA and SDMA Systems Employing I-Q Modulation [PDF]

open access: yes, 2010
The so-called receiver multiuser diversity aided multistage minimum mean-square error multiuser detector (RMD/MS-MMSE MUD), which was proposed previously by the author, is investigated in the context of the direct-sequence code-division multiple-access ...
Yang, Lie-Liang, Lie-Liang Yang
core   +1 more source

Color-Shift Keying and Code-Division Multiple-Access Transmission for RGB-LED Visible Light Communications Using Mobile Phone Camera

open access: yesIEEE Photonics Journal, 2014
Light-emitting diodes (LEDs) have been deployed for various applications in our daily lives. Similarly, image sensors or cameras integrated into mobile phones have become common. Hence, visible light communication (VLC) using LED and mobile phone cameras
Shih-Hao Chen, Chi-Wai Chow
doaj   +1 more source

Initial synchronisation of wideband and UWB direct sequence systems: single- and multiple-antenna aided solutions [PDF]

open access: yes, 2012
This survey guides the reader through the open literature on the principle of initial synchronisation in single-antenna-assisted single- and multi-carrier Code Division Multiple Access (CDMA) as well as Direct Sequence-Ultra WideBand (DS-UWB) systems ...
SeungHwan Won   +3 more
core   +1 more source

High performance mixed optical CDMA system using ZCC code and multiband OFDM

open access: yesEPJ Web of Conferences, 2017
In this paper, we have proposed a high performance network design, which is based on mixed optical Code Division Multiple Access (CDMA) system using Zero Cross Correlation (ZCC) code and multiband Orthogonal Frequency Division Multiplexing (OFDM) called ...
Nawawi N. M.   +3 more
doaj   +1 more source

Loosely Synchronised Spreading Code Aided Network Performance of Quasi-Synchronous UTRA-like TDD and FDD CDMA Systems [PDF]

open access: yes, 2005
It is demonstrated that loosely synchronised (LS) spreading codes exhibit a so-called interference-free window, where both the autocorrelation and cross-correlation of the codes become zero.
Ni, S., Hua, W., Hanzo, L.
core  

CDMA Transmission with Complex OFDM/OQAM

open access: yesEURASIP Journal on Wireless Communications and Networking, 2008
We propose an alternative to the well-known multicarrier code-division multiple access (MC-CDMA) technique for downlink transmission by replacing the conventional cyclic-prefix orthogonal frequency division multiplexing (OFDM) modulation by an advanced ...
Lélé Chrislin   +3 more
doaj  

Adaptive Rate DS-CDMA Systems using Variable Spreading Factors [PDF]

open access: yes, 2004
—In this contribution, adaptive rate transmissions are investigated in the context of direct-sequence code-division multiple-access (DS-CDMA) systems using variable spreading factors (VSFs).
Yang, L-L., Hanzo, L.
core  

Symbol and Bit Error Rates Analysis of Hybrid PIM-CDMA

open access: yesEURASIP Journal on Wireless Communications and Networking, 2005
A hybrid pulse interval modulation code-division multiple-access (hPIM-CDMA) scheme employing the strict optical orthogonal code (SOCC) with unity and auto- and cross-correlation constraints for indoor optical wireless communications is proposed. In this
Ghassemlooy Z., See C. K.
doaj   +1 more source

Performance of Broadband Multicarrier DS-CDMA using Space-Time Spreading-Assisted Transmit Diversity [PDF]

open access: yes, 2005
In this contribution multicarrier direct-sequence code-division multiple-access (MC DS-CDMA) using space–time spreading (STS)-assisted transmit diversity is investigated in the context of broadband communications over frequency-selective Rayleigh-fading ...
Yang, L-L., Hanzo, L.
core  

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