direct spread code division multiple access
Transmitter-based Multiple Access Interference Rejection and Diversity Techniques for Code-division Multiple Access Systems
... or multiple base stations (BS) that are interconnected with a mobile telephony switching ...the spread-spectrum techniques, the code- division multiple access (CDMA) systems can ...
120
Using chaotic sequence in direct sequence spread spectrum based on code division multiple access (DS CDMA)
... sequence spread spectrum is one of the spread spectrum ...a multiple access technique based on DS-SS in which multiple users can transmit their data on the same channel using orthogonal ...
10
A REVIEW ON IMPLEMENTATION OF SS- CDMA TRANSMITTER AND RECIEVER SYSTEM BY USING VHDL
... Digital Code Division Multiple Access ...CDMA multiple signal channels occupy the same frequency band being distinguished by the use of different spreading ...this direct ...
7
Multiuser Detection Assisted Time and Frequency Domain Spread Multicarrier Code Division Multiple Access
... multicarrier direct-sequence code-division multiple- access (MC DS-CDMA) scheme, which employs both time (T)-domain and frequency (F)-domain ...TF-domain spread MC DS-CDMA when ...
9
Blind estimation of long and short Pseudo random codes in multi rate LSC DS CDMA signals
... codes direct sequence code division multiple access signal, in this paper, a novel codes estimation method based on Fast-ICA algorithm and sequences properties is proposed in this ...
7
Time Hopping Multicarrier Code Division Multiple Access
... of spread-spectrum (SS) scheme, which was initially proposed in the 1960s (see [1], [2] and the references in them) in parallel with the other two types of SS schemes, namely direct-sequence SS (DS-SS) and ...
11
Differential space time modulation schemes for smart antenna aided generalized multicarrier DS CDMA systems
... Block Code (STBC), which was capa- ble of achieving a substantial diversity gain by simultaneously transmitting two symbols with the aid of two ...for Direct Sequence Code Division ...
5
Implementation of multi carrier code division multiple access frequency division multiple access with beyond 4G specifications
... Hopping Spread Spectrum) technologies are not as popular as the other two spread spectrum techniques, ...Sequence Spread Spectrum) and FH-SS (Frequency Hopping Spread Spectrum) ...to ...
55
Modeling and Simulation of CDMA Codes in Scilab
... as Direct Sequence Code Division Multiple Access ...Gold Code Generator for Global Positioning System ...by spread spectrum ...
8
Influence of laser diode nonlinearities on fibre optic systems supporting direct-sequence code division multiple access signals
... commercial Code Division Multiple Access (CDMA) systems proposed alongside the more usual FDM A/TDM A ...narrow spread bandwidth of ...
182
PAPR Reduction Using PSO-GSA Tuned PTS Techniques in MC-CDMA System
... In our work we have proposed a hybrid evolutionary optimisation algorithm which is combination of PSO and GSA as discussed in pevious chapter. PSOGSA optimisation as decribed earlier to optimise the combination of PTS ...
7
Performance and Analysis of DS-CDMA Rake Receiver and Analyzing the BER Performance in Presence of Nonlinear Distortion in DS-CDMA System
... uses a set of unique signature sequence or spreading codes to modulate the data bits of deferent users. With the knowledge of these spreading codes, the receiver can isolate the data corresponding to each user by the ...
6
W-CDMA Simulation For Receiver Part And Ber Performance In Awgn, Rayleigh Channel And Rician
... LITERATURE REVIEW 2.1 Multiple access technique 2.1.1 Frequency Division Multiple Access 2.1.2 Time Division Multiple Access 2.1.3 Code Division Multiple Access 2.1.3.1 Direct Spectrum C[r] ...
24
Performance Evaluation of a DS CDMA System in a Rayleigh Fading Environment
... the spread spectrum (SS) signal, using a locally generated code ...the code sequence used to spread the signal but also the codes of the received signal and the locally generated code ...
9
Implementation of Code Division Multiple Access using Asynchronous Sequential Techniques
... The signal of each user is separated or “de-spread” from the others at the receiver using a correlator key with the associated code sequence. Spreading codes of a spreading sequence can be divided into ...
5
Lowest PAPR Selection Technique from SLM and PTS with One IFFT Block in Wireless MC-CDMA Communication Systems
... Walsh Hadamard spreading code of length and a 16-QAM modulation, for the MC-CDMA system. The oversampling factor of the system is . The number of sub-blocks are chosen for the SLM optimization whereas the ...
5
Support Vector Machine Multiuser Receiver for DS CDMA Signals in Multipath Channels
... IRECT-sequence code-division multiple-access (DS-CDMA) [1] constitutes an attractive multiuser scheme that allows users to transmit at the same carrier fre- quency in an uncoordinated ...
8
A NOVEL TWO DIMENSIONAL SPECTRAL/SPATIAL HYBRID CODE FOR OPTICAL CODE DIVISION MULTIPLE ACCESS SYSTEM
... (Optical Code Division Multiple Access) is a huge research area where it attracts many interesting research for ...speed access network, high security, dynamic bandwidth assignment, ...
10
A NOVEL TWO DIMENSIONAL SPECTRAL/SPATIAL HYBRID CODE FOR OPTICAL CODE DIVISION MULTIPLE ACCESS SYSTEM
... spreading code is designed to scramble the data signal. The spreading code changing much faster than data signal that meant much higher frequency that data ...
11
A NOVEL TWO DIMENSIONAL SPECTRAL/SPATIAL HYBRID CODE FOR OPTICAL CODE DIVISION MULTIPLE ACCESS SYSTEM
... The path used for transmitting data packets is used upon receiving the RREP from the source node. If multiple RREPs are received, the source node would select the path with the highest number of sequences and the ...
10