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This paper presents the performance comparison of Single Carrier Frequency Division Multiple Access-Code Division Multiple Access (SC-FDMA-CDMA) and Orthogonal Frequency Division Multiplexing-Code Division Multiple Access (OFDM-CDMA) systems for uplink. We investigate the basic principle and the similarities and differences of these different schemes. According to these schemes, we discuss the performance...
SDMA (Space-Division Multiple Access) is a MIMO (Multiple-Input and Multiple-Output) based wireless communication network architecture which has the potential to significantly increase the spectral efficiency and system performance. So far several multiuser detection (MUD) schemes like Zero Forcing (ZF), Minimum Mean Square Error estimation (MMSE), ordered successive interference cancellation (OSIC)...
Single-carrier code-division multiple access (SC-CDMA) with frequency-domain equalization (FDE) has attracted renewed interest in CDMA due to its lower peak-to-average power ratio (PAPR) and higher frequency diversity than orthogonal frequency-division multiple access (OFDMA), increased robustness to asynchronous multipath and multiuser interference than RAKE-based CDMA, and a reduced need for timing...
This paper deals with characteristics and theory of code division multiple access (CDMA), orthogonal frequency division multiplexing (OFDM) and variable spreading factor orthogonal ferquency and code division multiplexing (VSF-OFCDM) systems. As comparison and evaluation of VSF-OFCDM with various 2D spreading factor (SF) as frequency and time dispersive transmission channel according to ETSI standard...
This paper presents comparison of vertical layered MIMO MC-CDMA and vertical layered MIMO OFDM system on the basis of bit error rate. Performance analysis is using Rayleigh fading channel and recursive least square algorithm for equalization. Analysis shows that the MC-CDMA system achieves low bit error at lower SNR.
Ultra-wideband (UWB) systems possess several distinct features such as very high data rate, large multipath or frequency diversity and improved ranging precision while requiring low-power low-complexity transceivers. Among the different modulation schemes, differential PSK is an attractive option because it does not require channel estimation, and hence reduces implementation complexity. This paper...
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