MIMO CDMA antenna systems
Low complexity frequency domain hybrid ARQ chase combining for broadband MIMO CDMA systems
... In this article, we investigate efficient minimum mean square error (MMSE) frequency domain equalization (FDE)- based iterative (turbo) packet combining for cyclic prefix (CP)-CDMA MIMO with Chase-type ARQ. ...
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Spreading Code Assignment Strategies for MIMO CDMA Systems Operating in Frequency Selective Channels
... In CDMA systems, spreading codes are assigned to different users to enable them to meet certain quality of service (QoS) requirements, such as data rate and band- width, ...conventional ...
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A NOVEL APPROACH TO GENERATE TEST CASES FOR COMPOSITION & SELECTION OF WEB SERVICES BASED ON MUTATION TESTING
... (MC-CDMA) systems, the above-mentioned three parameters may be simultaneously ...the MIMO technique, has become a core technology for future mobile radio communication ...multiple antenna ...
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Distributed Antenna Systems and MIMO Technology
... For MIMO to work, a rich scattering environment, with many different paths between transmitter and receiver, as well as a high signal-to-noise ratio are ...by MIMO processing to increase the capacity or the ...
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Design of Space-Time Coded Single-Carrier and Multi-Carrier MIMO-CDMA systems
... multiple antenna communication systems, in these systems multiple access interference mitigation at the receiver via multi-user beam forming and space-time modulation and coding for MIMO ...
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Turbo receiver for MIMO CDMA systems employing parity bit selected and permutation spreading
... spreading is used, the parity bits generated by a linear block encoder are used to select a spreading code from a set of orthogonal spreading sequences. The selected spreading code is then used to spread the signals in ...
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Receivers and CQI Measures for MIMO-CDMA Systems in Frequency-Selective Channels
... We investigate receiver designs and CQI (channel quality indicator) measures for the jointly encoded (JE) and separately encoded (SE) types of MIMO transmission. For the JE transmission, we develop a per-Walsh ...
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Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems
... antennas, respectively. In our simulations, we compare our proposed scheme with 2D OFDM-CDMA described in [6]. The maximum number of users allowed in Fig- ures 8 and 9 are 16, and 32 users, respectively. Simula- ...
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Multi user MIMO CDMA systems using complete complementary sequences
... proposed MIMO CC-CDMA system overcomes the problem associated with the low user-capacity of SISO CC sequences, by using the ‘set re-use’ technique that supports multi-user transmission mode of up to M F ...
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Frequency Domain Interference Cancellation for Single Carrier Cyclic Prefix CDMA System
... carrier CDMA can achieve good performance comparable to MC-CDMA and orthogonal frequency division multiplexing (OFDM) if FDE is ...carrier CDMA was shown to have two main advantages over OFDM, ...
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Radiation Pattern Analysis of Antenna Systems for MIMO and Diversity Configurations
... of antenna diversity, reduction of the correlation coefficient between the receiving antenna branches leads to an enhanced diversity ...receive antenna array is applied, but inherently assume a ...
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Performance Analysis of Electromagnetic Field Polarizations in MIMO Antenna Systems
... a MIMO antenna system. Andrews et. al [3] contended for a MIMO communication interface that gives six uncorrelated fields with three electric and three magnetic dipoles at the ...An antenna ...
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Free Space Optical Communication against Channel Fading
... As mentioned earlier, the signal level at a receiver in a wireless system fluctuates or fades. Spatial diversity gain mitigates fading and is realized by providing the receiver with multiple (ideally independent) copies ...
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Analysis of Bent Ground plane on MIMO Antenna
... Here, antenna array with three elements are proposed to evaluate the diversity performance of MIMO antennas ...plate antenna array with a bent ground plane is ...of antenna is found to be - ...
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PAPR reduction in SFBC MIMO MC-CDMA systems via user reservation
... multi-carrier CDMA (MC-CDMA), also known as orthogonal frequency division multiplexing CDMA (OFDM-CDMA), offers several key advantages such as immunity against narrowband interference and ...
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Effects of Near-Field Loading on Compact MIMO Antennas.
... Figure 3.13a shows that a near field load fabricated by PLA plastic in a reliable and easy-to-use 3D printer, Lulzbot Taz 6. Even the PEC near field load was used in the simulations, but the perfect electrical conductor ...
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EFFICIENT SMART ANTENNA FOR 4G COMMUNICATIONS
... The Fourth Generation (4G) Mobile Communications focuses not only on the data-rate increase but also on new air interface. In this paper 4G Mobile con-verges the advanced wireless mobile communications and high- speed ...
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Antenna Design for Ultra Wide Band Communications and Frequency Selective Surfaces
... Conventional systems are narrow band and typically operate around a center fre- ...These systems are analyzed using frequency domain ...ideal antenna acts as a differentiator and produces a field ...
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Reconfigurable Design of Adaptive Radius Sphere Decoding for MIMO Systems
... (MIMO) systems uses multiple antennas at the transmitter and the receiver to achieve high spectral ...in MIMO systems which achieve near Maximum Likelihood (ML) performance with reduced ...4X4 ...
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Resource allocation method for improved energy efficiency in mimo -ofdm wireless systems
... investigated antenna selectionOFDM systems from both capacity or error- performance perspective, for example, analysing diversity gain and coding gain, measuring capacity, or evaluating error ...in ...
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