multi-carrier CDMA scheme
Serial Acquisition Performance of Single and Multi carrier DS CDMA over Nakagami $m$ Fading Channels
... We assume that the transmitter aids the initial synchroniza- tion by transmitting the phase-coded carrier signal without data modulation at the commencement of each transmission. In the MC DS-CDMA ...
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Design, characterisation and performance assessment issues of multi-carrier CDMA exploiting higher order PSK/QAM formats for future wireless systems
... of CDMA based systems, it provides some background on spreading codes and then goes on to describe the Walsh-Hadamard ...and multi-carrier CDMA systems is then ...current CDMA based ...
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Single and Multi Carrier DS CDMA: Multi USer Detection, Space Time Spreading, Synchronisation, Standards and Networking
... chronous CDMA system designed for a frequency-selective Rayleigh fading ...decorrelating scheme were used for determining the channel estimate ...feedback scheme for obtaining the data ...
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Interference Free Broadband Single and Multi Carrier DS CDMA
... DS- CDMA due to employing multiple subcarriers. Consequently, MC DS-CDMA typically requires lower-rate signal processing than SC ...access scheme positioned between SC DS- CDMA and ...
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Differentially Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Assisted Multi Carrier DS CDMA Downlink
... II. MAT ANALYSIS OF CODE ACQUISITION In the case of code acquisition contrived for both MC-DS-CDMA and SC-DS-CDMA systems, the main design goal is to acquire perfect timing of the first received signal path ...
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Differentially Coherent Code Acquisition in the MIMO Aided Multi Carrier DS CDMA Downlink
... our MC-DS-CDMA code acquisition scheme using MTMR antennas. The receiver generates the decision variable by accumulating (PRU) number of indepen- dently faded signals observed over a time interval. In Fig. ...
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Design of Space-Time Coded Single-Carrier and Multi-Carrier MIMO-CDMA systems
... MIMO scheme multiple antennas are used and STBC codes generate the code symbols which are equal to the number of transmitting antennas that are used in MIMO ...
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OFDM: Comparison with Multicarrier Techniques and Applications
... multiple carrier modulation technique because it does not require ...emerging multi-carrier modulation scheme, which has been adopted for several wireless standards such as IEEE ...single ...
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A resource allocation approach to control interference in Multi Carrier DS CDMA systems
... realization scheme is MC- CDMA which is a referred to as CDMA-OFDM and second is ...ISI multi-carrier modulation is used by both schemes to condense the symbol rate and amount of ISI ...
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Differential space time modulation schemes for smart antenna aided generalized multicarrier DS CDMA systems
... generalized Multi-Carrier Direct Sequence Code Division Mul- tiple Access (MC DS-CDMA) system of [10] to propose a novel Differential Space-Time Spreading (DSTS) scheme as well as a ...
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PAPR Reduction Using PSO-GSA Tuned PTS Techniques in MC-CDMA System
... Abstract—Multi Carrier Code Division Multiple Access (MC-CDMA) is a promising technology for 4G wireless communication ...and Multi Carrier Code Division Multiple Access ...
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Serial Search Based Initial Code Acquisition in the Multiple Transmit/Receive Antenna Aided Multi Carrier DS CDMA Downlink
... time-variant multi-path fading environments ...(SC) CDMA and Orthogonal Frequency Division Multiplexing (OFDM) has drawn substantial research attention [2]- ...synchronous CDMA systems the mobile ...
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MULTI CARRIER CODE DIVISION MULTIPLE ACCESS (MC-CDMA) IS TECHNOLOGY FOR FAR-FLUNG INTERNET.
... previous scheme is that we have to take no of sub-carriers equal to the spreading factor which is not practically feasible for large no of ...this scheme, two bits are transmitted at a time keeping SF same ...
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Download complete issue: Vol. 2, No. 1 (PDF)
... multicarrier CDMA scheme (MC-CDMA) is one approach used to overcome those ...multicarrier CDMA systems ...system multi carrier DS-CDMA and multirate traffic have been ...
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Non Coherent Code Acquisition in the Multiple Transmit/Multiple Receive Antenna Aided Single and Multi Carrier DS CDMA Downlink
... a) Using multiple transmit antennas typically leads to an MAT performance degradation, except for specific scenarios, when encountering a single-path environment, also depending on the allocated bandwidth. Using a ...
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Performance Comparison of FH/MC DS CDMA with Single and Multi Carrier DS CDMA
... The multiple-access scheme is constituted by frequency-hopping FH based multicarrier DS-CDMA FWMC DS-CDMA, where the entire bandwidth of future systems can be divided into a number of su[r] ...
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An Improved Overloading Scheme for Downlink CDMA
... In any synchronized multiple-access system based on code- division multiple access (CDMA), the maximum number of orthogonal users equals the spreading factor N . In order to be able to cope with overloading of a ...
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Scalar Wavelet packet based multi-user Cognitive Radio Transceiver
... this scheme is rarely ...This scheme is more flexible compared to fixed CAS and the retrieval of the information at the receiver is possible with moderate ...
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Acquisition performance study of single and multi carrier DS CDMA over Nakagami m fading channels
... In addition, for any given threshold h, the mean acquisition time decreases, as the SNR/chip increases, and nally can reach a residual value, which is essentially due to the `penalty tim[r] ...
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Wireless Communication through Adaptive Modulation by MHPM Using OFDMA
... From the graphical investigation, plainly the m-ary CPM and m-ary MHPM modulation techniques i.e. m-ary CPM( from 10-6.3 to 10-6.5) and m-ary MHPM( from 10-6.3 to 10-7.0) have given minimum BER of up to 10- 8 once ...
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