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Independent Code Division Multiple Access in DS-CDMA
Wireless Personal Communications, 2021An independent component analysis (ICA) based CDMA receiver is proposed, which in addition to the independence of users also exploits the independence of pseudo-codes in user signal separation. The proposed scheme is termed as independent code division multiple access in contrast to orthogonal code division multiple access being used in conventional ...
Irfan Anjum +2 more
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2011
Multiple access is the ability of many users to communicate with each other while sharing a common transmission medium. Wireless multiple-access communications are facilitated if the transmitted signals are orthogonal or separable in some sense. Signals may be separated in time (time-division multiple access or TDMA), frequency (frequency-division ...
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Multiple access is the ability of many users to communicate with each other while sharing a common transmission medium. Wireless multiple-access communications are facilitated if the transmitted signals are orthogonal or separable in some sense. Signals may be separated in time (time-division multiple access or TDMA), frequency (frequency-division ...
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2010
An alternative to frequency division and time division multiple access schemes is provided by code division multiple access (CDMA), which permits multiple users to transmit simultaneously over a channel while occupying the same frequency band. This is effected by assigning a unique code or signature to each user.
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An alternative to frequency division and time division multiple access schemes is provided by code division multiple access (CDMA), which permits multiple users to transmit simultaneously over a channel while occupying the same frequency band. This is effected by assigning a unique code or signature to each user.
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On the construction of 2/sup n/ codes for optical code-division multiple-access
IEEE Transactions on Communications, 1995An optical orthogonal code (OOC), intended for optical code-division multiple-access (CDMA), is a collection of (0,1) sequences with good correlation properties (i.e., high autocorrelation peaks with low sidelobes, and low crosscorrelation values). A "serial" coding architecture for optical CDMA has been introduced and found particularly suitable for ...
Guu-Chang Yang, Wing C. Kwong
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Tandem Spreading Network-Coded Division Multiple Access
IEEE Transactions on Industrial Informatics, 2017Massive machine-type communication (MMTC) is the key technology to meet the flourishing Internet of things industry. One prominent characteristic of MMTC is massive connections which brings a critical challenge of multiple access interference (MAI) on channel estimation, user identification, and data detection.
Guo-Yu Ma +3 more
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1996
Spread spectrum systems were originally developed for military applications, to provide antijam and low probability of intercept communications by spreading a signal over a large frequency band and transmitting it with a low power per unit bandwidth [73], [247], [286].
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Spread spectrum systems were originally developed for military applications, to provide antijam and low probability of intercept communications by spreading a signal over a large frequency band and transmitting it with a low power per unit bandwidth [73], [247], [286].
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A Code-Division Multiple-Access Local Area Network
IEEE Transactions on Communications, 1987In this paper, we propose a code-division multiple-access (CDMA) approach as a method of local area networking, and analyze its physical performance. The proposed system has the advantage of a multiehannel multiaccess local area network, and provides the capability of easy access to different kinds of traffics, such as voice and data.
Jong-Rak Lee, Chong-Kwan Un
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1991
In code-division multiple access (CDMA) satellite systems, uplink stations are identified by uniquely separable address codes embedded within the carrier waveform. Each uplink station uses the entire satellite bandwidth and transmits through the satellite whenever desired, with all active stations superimposing their waveforms on the downlink. Thus, no
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In code-division multiple access (CDMA) satellite systems, uplink stations are identified by uniquely separable address codes embedded within the carrier waveform. Each uplink station uses the entire satellite bandwidth and transmits through the satellite whenever desired, with all active stations superimposing their waveforms on the downlink. Thus, no
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Broadband code division multiple access
1996 IEEE Aerospace Applications Conference. Proceedings, 2002The use of code division multiple access (CDMA) techniques for wireless communications systems, both terrestrial based and satellite based, has become of interest because of certain distinctive characteristics of spread spectrum waveforms relative to those of more conventional signals.
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Frequency Hopping Code Division Multiple Access for Wireless Local Access
International Journal of Wireless Information Networks, 1999In this paper, the suitability of Slow FrequencyHopping Code Division Multiple Access (SFHCDMA) isevaluated for wireless local access applications.Investigations of the wireless channel indicate that frequency hopping mitigates the poorpropagation characteristics associated with low mobilitycommon to fixed wireless applications.
Mike P. Fitton +2 more
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