multiple-access communications systems
Hybrid pulse interval modulation code division multiple access for optical wireless communications
... A CDMA system can be classed as synchronous, asynchronous or fully asynchronous modes. The error rate performance of each mode is different even when the same set of signature sequences is used [Salehi89b, Kwong91]. ...
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Multiple Access Technologies for Beyond 3G Wireless Cellular Systems
... In this section we describe the main features required for MA schemes in B3G systems and address promising techniques. In B3G mobile systems, high-date-rate transmission on the order of 10 Mb/s and more is ...
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Polarization division multiple access with polarization modulation for LOS wireless communications
... potential multiple access and modulation scheme based on polarized states (PS) of electromagnetic (EM) waves for line-of-sight (LOS) ...and multiple access scheme using ...wireless ...
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Performance and Capacity of PAM and PPM UWB Time Hopping Multiple Access Communications with Receive Diversity
... Figure 5 shows the performance of binary PPM and PAM UWB systems without receive diversity and with a receive di- versity order of 2. A Gaussian first derivative pulse was used with a pulse width of 0.6 nanosecond ...
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A Novel Hybrid Multiple Access Scheme in Downlink for 4G Wireless Communications
... cellular systems with spreading in frequency domain for downlink and spreading in time domain for ...having multiple data ...for multiple access interference and bit error rate are ...
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Multistage Frequency Hopping Assisted Ultra Wideband Multiple Access Communications
... wireless systems to broadband wireless sys- ...(UWB) systems [1] - [5], also re- ferred to as impulse radio or time domain radio systems, which have received considerable attention both in the USA ...
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A Review of Power Domain Non-Orthogonal Multiple Access in 5G Networks
... Orthogonal Multiple Access (OMA) techniques have always been the default approach for achieving a decent level of throughput performance in packet domain services with a simplified receiver design, which ...
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Transmitter-based Multiple Access Interference Rejection and Diversity Techniques for Code-division Multiple Access Systems
... wireless systems, the network consists of numerous mobile users communicating with one or multiple base stations (BS) that are interconnected with a mobile telephony switching ...division multiple ...
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Multicarrier DS CDMA: A Multiple Access Scheme for Ubiquitous Broadband Wireless Communications
... Multiuser detection (MUD) is a highly efficient detection technique, which is capable of attain- ing near-single-user performance, while support- ing a multiplicity of users and hence increasing the user capacity of ...
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A Novel Technique for Multiple Access Interference Reduction in DS-CDMA Wireless Communications
... We have chosen a very particular type of neural network called adaptive linear neuron (ADALINE) model for improving BER. The ADALINE is very flexible technique commonly used in error cancellation, signal processing and ...
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Cooperative Non-Orthogonal Multiple Access for Future Wireless Communications
... Over the past few years, the performance of NOMA in relay networks has been widely investigated as the use of relays offers a promising solution to improve the reliability and extend the radio coverage of communication ...
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Resource allocation for ultra reliable low latency communications in sparse code multiple access networks
... latency communications (URLLC) becomes a major concern in the design of 5G networks [12, ...NOMA systems to sup- port URLLC transmissions has recently emerged and fast ...
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A Multiple Access Technique for Differential Noise Shift Keying: A Review of Relevant Studies
... DS-CDMA communications system over AWGN channel was estimated with the use of theoretical derivation and numerical ...and multiple access communication ...division multiple access ...
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Prefiltering-Based Interference Suppression for Time-Hopping Multiuser UWB Communications over MISO Channel
... radio systems since it is a promising technique for low-complexity low-power short-range indoor wireless communications [1– ...in multiple access system, time-hopping (TH) spreading codes are ...
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Rate splitting multiple access for downlink communication systems: bridging, generalizing, and outperforming SDMA and NOMA
... Frequency-division multiple access; GDoF: Generalized degrees of freedom; HK: Han and Kobayashi; HRS: Hierarchical rate splitting; IC: Interference channel; IoT: Internet of Things; MISO: ...
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A novel compressed sensing based non orthogonal multiple access scheme for massive MTC in 5G systems
... Massive machine type communication (MMTC) char- acterized by the requirements of low data rates, small packet sizes, and in some cases, tight delay constraints is expected to be one of the major drivers for the 5th gen- ...
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Evolution of Mobile Wireless Technology from 0G to 5G
... Abstract -The ability to communicate with people on move has evolved remarkably, since Guglielmo Marconi, first demonstrated radio ability to provide continuous contact with ships. The mobile wireless evolved in a very ...
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Power and Resource Allocation for Orthogonal Multiple Access Relay Systems
... We consider an orthogonal multiple access relay (MAR) system with N source nodes (nodes 1, 2, . . . , N), one desti- nation node (node 0), and one relay (node R) that assists the source nodes in the ...
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Performance Analysis of Optical Spatial Modulation in Atmospheric Turbulence Channel
... Keywords: optical communications; optical spatial modulation; free-space optical communication; multiple-input-multiple-output (MIMO) systems; pulse position modulation; atmospheric turb[r] ...
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Performance Analysis of Downlink MIMO WCDMA Systems Using Antenna Selection in Transmitter and MRC Plus LDD in Receiver over Correlated Nakagami Fading Channels
... division multiple accesses (WCDMA) has been proposed to satisfy ever-increasing demands for higher data rates, as well as to allow more users to sim- ultaneously access the network ...for multiple ...
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