CDMA/OFDM
Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems
... (MIMO OFDM-CDMA) ...MIMO OFDM-CDMA is capable of achieving diversity gains significantly larger than that of the conventional 2-D CDMA OFDM and MIMO MC CDMA ...
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The Alamouti Scheme with CDMA-OFDM/OQAM
... appropriate OFDM/OQAM pulse shapes which satisfy conditions (ii) and (iii) can be designed, and these can lead to some advantages over the CP- ...with OFDM/OQAM could be used to provide the complex ...
13
Simulink Model Analysis of Modulation Technique of UWB, OFDM and CDMA for Different Parameter
... CDMA, OFDM and UWB are the most developing technologies in modern mobile communication ...[1]. OFDM is fast transmission technique, means it utilize parallel pipelining concept [2, ...
5
Design of Reconfigurable OFDM and CDMA Transceiver Based On FPGA
... modulation represents the transfer of the digital bit stream from the transmitter to the receiver via the analog channels. During the modulation process the information signal modifies one or more carrier parameters, ...
8
Analytical and Comparative Analysis of Ofdm, Cdma & Idma Systems
... In CDMA, unlike OFDM similar symbols (in analogous) can be transmitted over a certain subcarrier & are spread over entire subcarrier [4] [5] ...in CDMA CP is required so as to overcome the ...
6
CDMA Transmission with Complex OFDM/OQAM
... combine CDMA and orthogo- nal frequency division multiplexing (OFDM) with cyclic pre- fix ...the OFDM modulation and, on the other hand, it has a high flexibility in the multiple access scheme thanks ...
12
Out of Band Emission Reduction Technique for OFDM and MC CDMA Systems
... of OFDM and MC-CDMA-based systems is presented. In MC-CDMA, we select a set of codes distributing their subsets between ...For OFDM, for each symbol time data allocated at K=N data subcarriers ...
7
Generic Reduced Complexity MMSE Channel Estimation for OFDM and MC CDMA
... both OFDM and MC-CDMA systems communicating over seven-path dispersive Rayleigh fading ...the OFDM mode the system utilises 128 QPSK-modulated orthogonal ...the OFDM and the MC-CDMA ...
5
Generic MMSE Decision Directed Channel Estimation for OFDM and MC CDMA
... reminiscent to that used in [3]. In the OFDM mode, the system utilizes 128 QPSK-modulated orthogonal subcarriers. In the MC-CDMA mode we employ a full set of 128-chip Walsh- Hadamard (WH) codes for ...
5
Low Complexity Channel Estimation for OFDM and MC CDMA
... coded OFDM/MC-CDMA symbol, and (b) the MSE performance of the channel estimator for both the OFDM and the MC-CDMA systems considered under matched time-domain channel correlation ...
5
Title: Performance Analysis of Channel Estimation in MC-CDMA over OFDM in Fading & Non Fading Channel Environment
... in OFDM then we compare the result with same system OFDM to ...of OFDM and ...than OFDM system and MSE of OFDM system is better than ...
7
Detailed Mathematical Analysis and Performance Evaluation of MIMO-OFDM-CDMA System Using ZF Receiver
... Fig. 5 shows the BER performance of MIMO-OFDM- CDMA system, with different numbers of users in the channel where MAI is only considered. The results show a great improvement as compared to the performance ...
7
High performance mixed optical CDMA system using ZCC code and multiband OFDM
... optical CDMA spaces have been studied ...optical CDMA coding system has been widely investigated for coherent and incoherent optical multiple access techniques ...optical CDMA transmission system has ...
5
PERFORMANCE ANALYSIS OF FIXED AND MOBILE WIMAX SYSTEM BASED ON OFDM AND MC-CDMA SYSTEMS
... combined CDMA with Orthogonal Frequency Division Multiplexing (OFDM) to allow efficient use of available spectrum while retaining many advantages available in the CDMA ...of OFDM-CDMA ...
9
Recital on Multicarrier Communications: Space Time Coded versus Adaptive OFDM/MC CDMA
... In these systems the L different users' transmitted signals are separated at the base-station BS with the aid of their unique, user-specific spatial signamre, which is constituted by the[r] ...
19
Quadrature Amplitude Modulation: From Basics to Adaptive Trellis Coded, Turbo Equalised and Space Time Coded OFDM, CDMA and MC CDMA Systems
... multi-code CDMA in conjunction with pilot symbol-assisted channel estimation, RAKE reception and antenna diversity for providing multi-rate capabili- ties [653, ...
273
Multiple Input Multiple Output Antenna Design
... result CDMA, OFDM and UWB for various band pass method for instance BPSK, QPSK, QAM, 16 QAM, 64QAM and so ...of CDMA, OFDM and UWB for BPSK QPSK, QAM 16, QAM, 64 and QAM 256 tweak ...
10
Low Complexity Channel Estimation for OFDM and MC CDMA
... SUMMARY In this paper we have proposed a channel estimation method, which is based on a low-complexity decision directed MMSE FS-CLR estimator combined with a robust time-domain FS-CIR p[r] ...
5
Analysis of Carrier Frequency Selective Offset Estimation - Using Zero-IF and ZCZ In MC-DS-CDMA
... the OFDM variance and roughly 10% larger than the theoret- ical ...the OFDM variance, while for SNRs above 10dB, the theoretical variance predicts the observed ...
5
BER performance of MC DS CDMA systems in the presence of timing jitter : a thesis presented in partial fulfillment of the requirements for the degree of Master of Engineering in Information and Telecommunication Engineering at Massey University, Palmerston North, New Zealand
... of CDMA systems based on the combination of CDMA schemes and OFDM technique, which are referred to as multi-carrier CDMA systems, has received a lot of attention in the field of wireless ...
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