Results 71 to 80 of about 242 (110)

Multi-User Detection for Group Orthogonal Multi-Carrier Code Division Multiple Access System in Frequency Selective Rayleigh Fading Channel

Journal of Engineering and Sustainable Development, 2008
Code Division Multiple Access (CDMA) suffers from multi-user interference (MUI), and intersymbol interference (ISI) under frequency selective multi-path fading channels. Orthogonal Frequency Division Multiple access (OFDM) is MUI free but achieves lower
Maha George Zia, Harith Akram Nassir
doaj  

Design of a Baseband Transceiver for Multicarrier CDMA Communications

EURASIP Journal on Advances in Signal Processing, 2005
Multicarrier systems have become popular for their spectral efficiency and robustness against frequency-selective fading. Multicarrier code-division multiple access (MC-CDMA) is a technique that combines the advantage of multicarrier modulation with ...
Tsai Pei-Yun, Kang Hsin-Yu, Chiueh Tzi-Dar   +2 more
doaj   +1 more source

Crest Factor Reduction in MC-CDMA Employing Carrier Interferometry Codes

EURASIP Journal on Wireless Communications and Networking, 2004
This paper addresses signal compactness issues in MC-CDMA employing carrier interferometry codes using the measure of crest factor (CF). Carrier interferometry codes, applied to N -carrier MC-CDMA systems, enable 2N users to simultaneously share the
Natarajan Balasubramaniam, Nassar Carl R.   +1 more
doaj   +1 more source

Impact of reformed RM Encoded data on PAPR of Multicode CDMA under MSK

Sir Syed University Research Journal of Engineering and Technology, 2016
In this research work, the effect of Reformed Reed Muller Encoded Data (RRMED) on Peak to Average Power Ratio (PAPR) of Multicode Code Division Multiple Access (MC-CDMA) systems was studied under Minimum Shift Keying (MSK) modulation. Simulation studies
S. Rizwan-ul- Hasan, Najeeb Siddiqui, Shakil Ahmed   +2 more
doaj  

Some of the next articles are maybe not open access.

Related searches:

Adaptive Carrier Interferometry MC-CDMA

IEEE Transactions on Vehicular Technology, 2006
An adaptive carrier interferometry (CI) scheme is proposed for multicarrier code-division multiple-access (MC-CDMA) systems where it is assumed that there is a feedback channel between the receiver and the transmitter. By exploiting the additional degree of freedom in selecting the amplitudes of the subcarriers in accordance with the channel condition,
S. Sureshkumar, H.H. Nguyen, E. Shwedyk
openaire   +1 more source

Combining techniques for MC-CDMA

The Thrity-Seventh Asilomar Conference on Signals, Systems & Computers, 2003, 2004
This paper investigates combining techniques for multi-carrier CDMA (MC-CDMA) systems. Specifically, based on the maximum likelihood criteria, optimal combining techniques are derived and discussed for the following scenarios: (1) channel information is not available at the receiver; (2) a statistical characterization of the channel fades is available ...
null Zhiqiang Wu, null Xiaoxia Zhang, null Xiaoyao Xie   +2 more
openaire   +1 more source

Rotated constellation MC-CDMA system

Seamless Interconnection for Universal Services. Global Telecommunications Conference. GLOBECOM'99. (Cat. No.99CH37042), 2003
We introduce rotated constellations of signals in multi-carrier code-division multiple-access (MC-CDMA). The performance of this new system is obtained and compared to that of conventional MC-CDMA system. Numerical results consider a typical indoor environment.
F.M. Assis, E.S. Sousa
openaire   +1 more source

Performance Analysis and Comparison of Coded FH/MC-CDMA and MC-CDMA Communication System

2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
In this paper, we will combine the frequency hopping (FH) and the multi-carrier code division multiple access scheme (MC-CDMA) through an internal coding. The total bandwidth will be divided to a number of sub-bands with equal bandwidth. In each signalling interval, the output of a super orthogonal encoder selects one of the sub-bands for data ...
Sanaz Barghi, Masoumeh Nasiri-Kenari
openaire   +1 more source

BER Performance Comparison between FHPB/MC-CDMA and MC-CDMA under Multipath Rayleigh Fading Channels

2006 Asia-Pacific Conference on Communications, 2006
Frequency hopping partially blocked multicarrier code division multiple accesses (FHPB/MC-CDMA) system is proposed in this paper and the system compares BER performance of MC-CDMA system under multi-path Rayleigh fading channels. FHPB/MC-CDMA may be considered as a novel modulation scheme and multiple access technique for next generation wireless ...
Muhammad Ullah, Kyesan Lee
openaire   +1 more source