space-time spreading transmit diversity
Performance of Broadband Multicarrier DS CDMA using Space Time Spreading Assisted Transmit Diversity
... STS-assisted transmit diversity, when communicating over frequency-selective Rayleigh-fading ...employing time (T)-domain spreading only, in this contribution we also investigate the broadband ...
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Differential Space Time Spreading using Iteratively Detected Sphere Packing Modulation and Two Transmit Antennas
... 2 space-time block code of [2, ...the diversity product of STS systems [7] is deter- mined by the minimum Euclidean distance of all legitimate vectors (x 1 , x 2 ), where the time index is ...
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Super-Orthogonal Space-Time Turbo Transmit Diversity for CDMA
... turbo transmit diversity (SOTTD) has been presented for ap- plication in code-division multiple-access (CDMA) commu- nication ...low-rate spreading and coding have been combined with orthogonal ...
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Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems
... better diversity gains. This is done by spreading on all the signal domains; ...i.e, space-time frequency spreading is employed to transmit users’ ...achieving diversity ...
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Differential Space Time Spreading using Four Transmit Antennas and Iteratively Detected Sphere Packing Modulation
... substantial diversity gain, while using four transmit antennas without the need for any ...four transmit antennas outperforms that em- ploying two transmit antennas due to the increased ...
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Performance of Wideband CDMA Using Space Time Spreading over Multipath Nakagami Fading Channels
... using space- time spreading (STS) based transmit diversity is investigated, when frequency-selective Nakagami- m fading channels, multiuser interference and background noise are ...
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Broadband MC DS CDMA Using Space Time and Frequency Domain Spreading
... assisted transmit diversity and time-frequency-domain (TF-domain) ...T-domain spreading factor and the F-domain spreading factor, while it is independent of the frequency ...
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Performance of the Smart Antenna Aided Generalized Multicarrier DS CDMA Downlink using both Time Domain Spreading and Steered Space Time Spreading
... Various transmit diversity (TD) schemes have been proposed in the literature for the downlink [9], [10], [11] for the sake of mitigating the performance degradation inflicted by multipath ...
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Adaptive Differential Space Time Spreading Assisted Turbo Detected Sphere Packing Modulation
... including space-time block codes (STBC) [10, 11], coherently de- tected space-time spreading (STS) [12] and differentially detected space-time spreading (DSTS) ...
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Adaptive Space Time Spreading Assisted Wideband CDMA Systems Communicating over Dispersive Nakagami m Fading Channels
... STS-based transmit diversity, when encountering multipath Nakagami-m fad- ing channels, multiuser interference, and background ...the diversity order achieved is the product of the transmit ...
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Differential Detection of Space Time Spreading with Two Transmit Antennas
... Receive diversity has been well known as one powerful tech- nique to mitigate the e ff ect of fading and shadowing for high-rate data transmission over wireless hostile ...receive diversity at the mobile ...
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Downlink Space–Time Spreading Using Interference Rejection Codes
... LS spreading signature ...the spreading codes, the STS scheme using LS codes refrains from invoking the conventional scheme’s scrambling ...code-based spreading does not constitute a problem in ...
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Increased diversity space time coding using the diversity transform
... spatial diversity gain of N · mn, while that of the first scheme depends on the temporal diversity gain provided by the diversity ...four transmit, two receive antennas (with no DRT) reveal ...
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Implementation of Transmit Diversity Schemes
... SFBC simulation results indicate at a bit error rate (BER) of 10 -2 with diversity gain of about 5 dB and about 15 dB of gain at a BER of 10 -4 . SFBC performance curve gives an error floor due to the ...
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Chip Interleaved Multirate and Multimedia Transmission in Self Encoded Communication System with Iterative Detection over Fading Channels
... In Figure 6, both SEMM and multirate random schemes are employed the decorrelation. However, itera- tive detection is applicable for SEMM only which is able to achieve about 3 dB gain over random sequence. That is ...
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Single Carrier Frequency Domain Equalization Abinash Kumar, Ravi Kateeyare
... while diversity gain provides reliability in fading environment. Space time block coding is one of the transmitter diversity techniques ...[13]. Space time block coding at the ...
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Performance Analysis of a Wireless CDMA Transmission System with Receiver Diversity Schemes
... Note that for an ideal system without MAI, this BER is equivalent to MRC with MxL-order of diversity and the precoder reduces the space-time pre-RAKE method. The performance degradation is caused by ...
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Antenna Selection and Space-Time Spreading Methods for Multiple-Antenna Systems
... We then investigated the robustness of various receiver architectures, including RF pre-processing and antenna selection, to RF non-idealities and channel estimation errors. Both spatial multiplexing and spatial ...
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Non Vanishing Space Time Block Code for Three Time Slots and Two Transmit Antennas
... The proposed STBC scheme has some interesting properties: 1 the scheme can achieve full rate and full diversity; 2 its maximum likelihood ML decoding requires a joint detection of three [r] ...
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Performance analysis of space time block codes in LTE advanced system
... include transmit diversity, beam-forming, SU-MIMO (Single User-MIMO) and MU- MIMO (Multi User- MIMO), to improve cell coverage and throughput in both uplink and ...downlink. Space time code ...
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