Results 41 to 50 of about 5,465 (214)
EURASIP Journal on Wireless Communications and Networking, 2008 In wireless communications, multicarrier direct-sequence code-division multiple access (MC DS-CDMA) constitutes one of the highly flexible multiple access schemes. MC DS-CDMA employs a high number of degrees-of-freedom, which are beneficial to design and
Wang Li-Chun, Yang Lie-Liang
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Rotated Walsh-Hadamard Spreading with Robust Channel Estimation for a Coded MC-CDMA System
EURASIP Journal on Wireless Communications and Networking, 2004 We investigate rotated Walsh-Hadamard spreading matrices for a broadband MC-CDMA system with robust channel estimation in the synchronous downlink. The similarities between rotated spreading and signal space diversity are outlined. In a multiuser MC-CDMA
Raulefs Ronald +4 more
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Joint multiuser detection and cancelation of nonlinear distortion effects for the uplink of MC-CDMA systems [PDF]
, 2006 In this paper we consider the uplink transmission in MC-CDMA systems (multicarrier coded division multiple access). To reduce the envelope fluctuations of the transmitted signals, the MC-CDMA signal associated to each MT (mobile terminal) is submitted to
Dinis, Rui, Silva, Paulo
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Energy‐Aware Protocol Design and Evaluation of the PHY Layer in Satellite IoT
International Journal of Satellite Communications and Networking, Volume 43, Issue 2, Page 61-76, March/April 2025.ABSTRACT Direct‐to‐satellite communication for the Internet of Things (IoT) has attracted significant interest from both the scientific community and major telecommunications players. The integration of satellite connectivity in smartphones and IoT devices promises a transformative impact on critical applications such as environmental monitoring, asset
Simon Heine +2 more
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Investigating the relation between optimum guard interval and channel delay spread for a MC-CDMA system [PDF]
, 2012 This paper demonstrates a novel approach to determining the optimum guard interval for a multicarrier code division multiple access (MC-CDMA) system. Analytical expressions for useful and interference power are derived as a basis for comparison.
Gokalp, H, Kurnaz, C
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Impact of Ionospheric Scintillations on GNSS Availability and Precise Positioning
Space Weather, Volume 23, Issue 2, February 2025.Abstract For many applications where accuracy, availability, and integrity are essential, such as geodetic positioning and civil aviation, Global Navigation Satellite Systems (GNSS) are indispensable. However, GNSS signal dependability is severely hampered by ionospheric disturbances, especially equatorial plasma bubbles (EPBs), particularly in ...
C. R. Aguiar +2 more
wiley +1 more source
Design and Implementation of MC-CDMA Technique Using FPGA [PDF]
Engineering and Technology Journal, 2013 Multicarrier Code Division Multiple Access (MC-CDMA) is attractive technique for high speed wireless data transmission; it's a combination of Orthogonal Frequency Division Multiplexing (OFDM) and Code Division Multiple Access (CDMA).
il A. H. Hadi, Layla Hattim Abood
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Crest-factor study of MC-CDMA and OFDM [PDF]
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324), 1999 The crest-factor (CF) of M-ary PSK MC-CDMA systems is shown to be dependent upon the aperiodic cross-correlations as well as on the aperiodic autocorrelations of the spreading codes used. Based on this observation, the crest-factor distributions of BPSK MC-CDMA using two different binary orthogonal spreading sequences namely Walsh codes and orthogonal ...
Choi, B.J., Kuan, E.L., Hanzo, L.
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DDMA Signal Separation Method Based on Frame‐Interleaved Binary Mask
Electronics Letters, Volume 61, Issue 1, January/December 2025.To solve the problem of multi‐target separation failure at the same distance in empty‐band Doppler division multiple access system, we propose the frame‐interleaved binary mask method. This method can effectively separate multiple targets in above scenario. ABSTRACT Millimetre‐wave multiple‐input multiple‐output (MIMO) radar has many advantages such as
Lu Qian +3 more
wiley +1 more source
Generalized orthogonal transmission system and its efficient implementation method
Tongxin xuebao, 2002 Based on subband transformation theory, a general model for orthogonal transmultiplexers is constructed. Besides several popular multiuser communication applications such as TDMA, FDMA and CDMA, it can also describe multi-carrier systems such as OFDM and
ZHANG Deng-yin, ZHENG Bao-yu
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