Space-Time Spreading Assisted Multicarrier DS-CDMA
A Space Time Spreading Assisted Multicarrier DS CDMA System using OVSF Codes Employing Adaptive Mode Switching Thresholds and Adaptive Modulation
... CDMA. The system considered is capable of supporting multi- ple bit rates by employing OVSF spreading codes and adaptive threshold-learning assisted AQAM. It was demosntrated that as the channel ...
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Performance of Broadband Multicarrier DS CDMA using Space Time Spreading Assisted Transmit Diversity
... From June 1997 to December 1997, he was a Vis- iting Scientist at the Institute of Radio Engineering and Electronics, Academy of Sciences of the Czech Republic, Prague. Since December 1997, he has been with the ...
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Downlink Steered Space Time Spreading Assisted Generalised Multicarrier DS CDMA Using Sphere Packing Aided Multilevel Coding
... sided noise power spectral density. The remaining system parameters are outlined in Table II. Figure 2 shows that the performance of the system supporting K = 4 users is similar to that of the system serving a single ...
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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
... However, the desired signal is not interfered by the trans- mth transmit antenna array, which is generated by the Maxi- mitted signals of the users employing different orthogonal T- mum [r] ...
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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
... orthogonal multicarrier signals, synchronous transmission of the K user signals as well as slow flat-fading of each subcarrier, where no interference is encountered between the 32 users employing different ...
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A Multicarrier DS CDMA System Using Both Time Domain and Frequency Domain Spreading
... single-carrier DS-CDMA or a MC-CDMA is invoked for the sake of supporting a high number of users, the employment of advanced multiuser detection algorithms becomes impractical owing to their high ...
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Broadband MC DS CDMA Using Space Time and Frequency Domain Spreading
... MC DS- CDMA system using TF-domain spreading and the assignment of or- thogonal codes to the users is analyzed as ...F-domain spreading is ...orthogonal spreading codes can be assigned ...
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Coherent and Differential Downlink Space Time Steering Aided Generalised Multicarrier DS CDMA
... l space-time code X ku,n = X ku,n−1 G ku,n . After spreading X ku,n with the aid of N l orthogonal Walsh-Hadamard spread- ing codes {c k,1 , c k,2 , ...are multicarrier-modulated to a group of ...
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A Flexible Transmit Diversity Assisted Broadband Multicarrier DS CDMA Scheme
... In the advocated broadband MC DS-CDMA systems the sub- carrier signals conveying the different chips of the Fdomain spreading code encounter independent fading, therefore the or[r] ...
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Differential space time modulation schemes for smart antenna aided generalized multicarrier DS CDMA systems
... differential space- time processing schemes based on the principles of DSTS and DSSTS, in order to enhance the attainable performance of gen- eralized MC DS-CDMA systems operating in fast ...
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Time and Frequency Domain Spreading Assisted MC DS CDMA using Interference Rejection Spreading Codes for Quasi Synchronous Communications
... the time (T)- domain [1, 2], while the second in the frequency (F)-domain, resulting in the scheme known as MC-CDMA ...above spreading schemes has been ...two spreading sequences for this ...
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Software Defined Radio Assisted Adaptive Broadband Frequency Hopping Multicarrier DS CDMA
... narrowband CDMA, W-CDMA, and OFDM — as well as the supporting network structures such as LANs and ...FH/MC DS-CDMA ...the time-varying channel quality implies that for a given service ...
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Blind Joint Soft Detection Assisted Slow Frequency Hopping Multicarrier DS CDMA
... is time limited or bandwidth limited and it is also nor- malized according to ...the spreading [6], and also assume that there exists no interference between ...
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Subspace Based Blind and Group Blind Space Time Multiuser Detection for the Generalized Multicarrier DS CDMA Uplink
... group-blind space-time multiuser detection is invoked for a smart antenna aided generalized MC DS-CDMA system communicating over a dispersive Space-Time (ST) Rayleigh fad- ing ...
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Single and Multi Carrier DS CDMA: Multi USer Detection, Space Time Spreading, Synchronisation, Standards and Networking
... We feel particularly indebted to Denise Harvey for her skilful assistance in correcting the final manuscript in LaTeX. Without the kind support of Mark Hammond, Sarah Hinton, Z¨oe Pinnock and their colleagues at the ...
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Single and Multi Carrier DS CDMA: Multi USer Detection, Space Time Spreading, Synchronisation, Standards and Networking
... FH/MC DS-CDMA System Above we have discussed a range of ART schemes, which were controlled by the prevalent service requirements and the channel ...FH/MC DS-CDMA based broadband mobile ...
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IB-DFE receivers with space diversity for CP-assisted DS-CDMA and MC-CDMA systems
... A simple frequency-domain matched filtering is also known to lead to a very poor performance. For this reason, an MMSE (Minimum Mean-Squared Error) FDE equalizer is usually preferable [11]. However, an FDE/MMSE does not ...
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Low Complexity Selective Adaptive Multicarrier DS-CDMA Receiver
... MC DS-CDMA System Model The block diagram of the orthogonal MC DS-CDMA transmitter of user k is shown in ...the time-domain spreading code c k (t ) , which is a purely random PN ...
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Multiuser Detection in Multicarrier CDMA Systems Employing Both Time Domain and Frequency Domain Spreading
... T-domain spreading factor and the F-domain spreading fac- ...short spreading codes can be employed in TF-domain spread MC DS-CDMA ...single-carrier DS-CDMA or a ...
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Adaptive Space Time Spreading Assisted Wideband CDMA Systems Communicating over Dispersive Nakagami Fading Channels
... In the context of the STS-assisted W-CDMA system, the delay spread of the wireless channels, and hence the num- ber of resolvable paths, varies slowly over a range span- ning from one to dozens of paths. ...
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