Results 81 to 90 of about 31,714 (226)
Carrier Sense Random Packet CDMA Protocol in Dual-Channel Networks [PDF]
Radioengineering, 2015 Code resource wastage is caused by the reason that many hopping frequency (FH) sequences are unused, which occurs under the condition that the number of the actual subnets needed for the tactical network is far smaller than the networking capacity of ...
C. Du +5 more
doaj
Performance of MMSE Multiuser Detection in Cellular DS-CDMA Systems Using Distributed Antennas [PDF]
, 2006 In this contribution we propose and investigate a high-capacity cellular direct-sequence code-division multiple-access (DS-CDMA) wireless communications system, where numerous antennas are distributed in the area covered by the system. The bit error rate
Yang, Lie-Liang
core
Physical Layer Built-In Security Analysis and Enhancement Algorithms for CDMA Systems
EURASIP Journal on Wireless Communications and Networking, 2007 Historically developed for secure communication and military use, CDMA has been identified as a major modulation and multiple-access technique for 3G systems and beyond.
Li Tongtong, Ling Qi, Ren Jian
doaj +2 more sources
ANALISIS PREFERENSI PILIHAN KONSUMEN TERHADAP KARTU CDMA PRABAYAR
J@ti Undip: Jurnal Teknik Industri, 2012 Kartu CDMA Prabayar merupakan alternatif lain bagi pengguna telpon seluler, setelah GSM. Penelitian ini ditujukan untuk mengetahui preferensi konsumen pemakai kartu CDMA Prabayar dan mengidentifikasi prioritas faktor pilihan konsumen dalam memilih kartu ...
Uyuunul Mauidzoh
doaj +1 more source
Burst-by-Burst Adaptive Multiuser Detection CDMA: A Framework for Existing and Future Wireless Standards [PDF]
, 2003 This paper provides a broad overview of the multiuser detection literature of the past few years in a nonmathematical, easily accessible approach. The treatment is then extended to the comparative study of channel-quality controlled burst-by-burst (BbB ...
Kuan, E.L., Hanzo, L.
core
Asymptotic Spectral-Efficiency of MIMO-CDMA Systems with Arbitrary Spatial Correlation [PDF]
In this contribution, we analyze the asymptotic spectral-efficiency (ASE) of multiuser MIMO-CDMA systems, when assuming communications over flat fading channels with arbitrary spatial correlation.
Zhang, Youguang +3 more
core
CDMA Transmission with Complex OFDM/OQAM
EURASIP Journal on Wireless Communications and Networking, 2007 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 ...
Chrislin Lélé +3 more
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Generalized Multicarrier DS-CDMA Using Various Chip Waveforms [PDF]
, 2003 In this contribution the family of generalized multicarrier DS-CDMA (MC DS-CDMA) schemes [1] 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
Yang, L-L., Hanzo, L.
core
EURASIP Journal on Wireless Communications and Networking, 2004 Multiple-access interference and interfinger interference limit the capacity of conventional single-carrier DS-CDMA systems. Even though multicarrier CDMA posses the advantages of conventional CDMA and OFDM, it suffers from two major implementation ...
Madhukumar A. S. +3 more
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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
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