CDMA

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CDMA

abbreviation for
(Telecommunications) code-division multiple access: a digital technology used in mobile phones
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References in periodicals archive ?
'Working with innovative companies like Qualcomm Technologies allows Aruba to utilize key Wi-Fi 6 features such as OFDMA, dual 5G, intelligent network management and target wake time (TWT) to deliver simple, secure and intelligent enterprise-grade solutions that enable customers to realize the business advantages afforded by this next generation wireless technology.'
In this research, we propose the Spectrum handoff-SFR (S-SFR) under a CAC algorithm with a preemption technique to enhance the performance of OFDMA cellular network.
Ali, "Subcarrier Multiplexing in LTE-CoMP OFDMA," in Proc.
Toftegaard, "History-based adaptive modulation for a downlink multicast channel in OFDMA systems", in IEEE Wireless Communications and Networking Conf., (WCNC 2008), pp.
LTE standard performance specifications Metric Specifications Peak data rate Downlink: 300 Mbps Uplink: 75 Mbps Modulation QPSK, 16QAM and 64QAM (Uplink/Downlink) Bandwidth (MHz) 1.4, 3, 5, 10, 15 and 20 TTI 1ms Sub-carrier spacing 15KHz Access schemes OFDMA (Downlink) SC-FDMA (Uplink) Duplex schemes Frequency Division Duplex (FDD) Time Division Duplex (TDD) Mobility Low speeds (0 - 3 Km/hr) High speeds (30 - 120 Km/hr) Supported antenna Downlink: 4x4, 4x2, 2x2, 1x2 and 1x1 configurations Uplink: 1x2 and 1x1 Table 2.
In this paper, we intend to exploit the optimal linear processing of relays in OFDMA AF-based relaying network consisting multiple relays multiple users, similar as Figure 1.
Keywords: OFDMA, cylostationarity, blind recognition, software defined radio
Since multiple free channels can be used in data transmission, an Orthogonal Frequency Division Multiple Access (OFDMA) system is taken as the underlying multiple access approach.
Kong, the authors propose a joint user scheduling and multiuser hybrid beamforming algorithm for downlink massive MIMO Orthogonal Frequency Division Multiple Access (OFDMA) system.
Orthogonal frequency division multiple access (OFDMA) represents the natural extension of OFDM to support many simultaneous users.
In LTE downlink, orthogonal frequency division multiple access (OFDMA) is used as the radio access technology for its robustness to multipath fading and higher spectral efficiency [2, 3].