[PDF] Top 20 Iterative detection of multicode DS-CDMA signals with strong nonlinear distortion effects

... CP-assisted DS-CDMA schemes. We have several parallel streams with different powers so as to achieve multi- ...transmitted signals have very low PMEPR thanks to the adoption of clipping ... See full document

... performance of nonlinearly distorted OFDM signals when bandpass memo- ryless nonlinearities are employed at the ...compared with OFDM signals with conventional, linear transmitters) and ... See full document

... As with other multicarrier schemes, MC-CDMA signals have strong envelope fluctuations and high PMEPR values (Peak-to-Mean Envelope Power Ratio), which lead to ampli- fication ...fluctuations ... See full document

... a CDMA scheme with OFDM modulation (Orthogonal Frequency Division Multi- plexing) [5], so as to allow high transmission rates over severe time-dispersive channels without the need of a com- plex ... See full document

... uplink of MC-CDMA systems with frequency-domain ...blocks with length KM = 256, plus an appropriate CP. QPSK con- stellations, with Gray mapping, are ...PMEPR) of the transmitted ... See full document

... receivers, with either hard decisions or soft decisions, when K = 16 and K = 256, ...the iterative receiver we can improve significantly the performances of both modulation ...use of soft ... See full document

... Abstract—A DS-CDMA (Direct Sequence-Coded Division Mul- tiple Access) system has maximum spectral efficiency if the system is fully loaded ...number of users is equal to the spreading factor) and we ... See full document

... use of SDMA (Space Division Multiple Access) techniques for the uplink of MC- CDMA systems (MultiCarrier - Coded Division Multiple Access) where the transmitted signals face strong ... See full document

... type of equalizer is employed in DS-CDMA systems we are not able to fully orthogonalize the different spreading ...promising nonlinear receiver structure was proposed in [11] which employs an ... See full document

... class of nonlinear signal processing schemes, combining a nonlinear operation in the time- domain with a linear, frequency-domain filtering oper- ation, was recently proposed for reducing the ... See full document

... performance of nonlinearly-distorted multicode DS-CDMA systems with iterative estimation and cancelation of nonlinear distortion ...cope with ... See full document

... channels with deep in-band notches, the FDE is usually optimized under an MMSE criterion (Minimum Mean-Squared Error) ...the iterative receiver proposed in ...transmission with single-carrier modula- ... See full document

... the signals associated to di®erent users are a®ected by di®erent propaga- tion ...uplink of CP-assisted systems was recently proposed [8, ...tage of the spectral correlations inherent to cyclosta- ... See full document

... channels with deep in-band notches, which can lead to significant performance ...type of equalizer is employed within MC-CDMA systems we are not able to fully orthogonalize the different spreading ... See full document

... fluctuations of the trans- mitted ...combined with an iterative estimation and cancelation of nonlinear distortion effects, with relatively low complexity since ... See full document

... analysis of interference channels (IC) have shown that capacity of an interference channel for a given user is one half the rate of its interference-free capacity in the high transmit power regime, ... See full document

... lines of the present work and a short study on the available high order developments of the classical Newtons method, we will provide our contribution in the next ...class of efficient three-step ... See full document

... number of subcarriers. The Gaussian approximation of the nonlinear self- interference at the subcarrier level is very accurate provided that 𝑁 2 is ...the nonlinear distortion levels ... See full document

... use of power-efficient saturated amplifiers, since those signals do not have the high peak-to-average ratio of OFDM signals, but maintain most of the OFDM ...the nonlinear nature ... See full document

... variety of Space-Time codes exists in the ...rate of one symbol per channel use (PCU) with 2 N t diversity was achieved ...ML detection of the Alamouti scheme can be implemented by a ... See full document