[PDF] Top 20 Coherent Code Tracking for Spatial Transmit Diversity DS-CDMA Systems

... exploiting transmit antenna ...the tracking loop is temporarily guided by the ...the tracking device to drift further from the max- imum effect ...of transmit anten- nas reduces the probability ... See full document

... initial code acquisition ...initial code acquisition arrangement of the SC-DS- CDMA benchmark system as a function of the number of transmit antennas for P = 1, 2 as well as 4 and that ... See full document

... multiple transmit antenna aided SC-DS-CDMA ...of code acquisition schemes designed for an MTMR antenna assisted MC-DS-CDMA system in the context of differentially coherent ... See full document

... From June 1997 to December 1997, he was a Vis- iting Scientist at the Institute of Radio Engineering and Electronics, Academy of Sciences of the Czech Republic, Prague. Since December 1997, he has been with the ... See full document

... aided transmit diversity effects on the initial acquisition performance of the inter-cell synchronous CDMA ...of transmit antennas results in combining the low-energy, noise-contaminated ... See full document

... asynchronous DS- CDMA time-delay detector is developed that utilizes the con- cept of the multistage reduced-rank Wiener ...new DS-CDMA detector does not require the stringent power control ... See full document

... B3G systems and address promising techniques. In B3G mobile systems, high-date-rate transmission on the order of 10 Mb/s and more is ...In DS-CDMA, many weak multipaths tend to ...achieving ... See full document

... sequence CDMA (MC-DS-CDMA) (time domain ...of CDMA and OFDM, resulting in better frequency diversity and higher data ...using code chips and transmitted on several ...the ... See full document

... for transmit diversity, which provides in- creased performance and resistance to ...receiver diversity advantage, since the receiving multiple antennas provide multiple independently faded replicas ... See full document

... different systems, namely for STS employing an (M × 1)-dimensional AA for M = 2, 4, 6, and 8, as well as for both SSTS and DSSTS employing (M × L)- dimensional AAs in conjunction with M = 2 and L = 1, 2, 3, and ... See full document

... multiple transmit antennas and subcarriers in the downlink of wireless systems exhibits an attractive technique of reducing the detrimental effects of time-variant multi-path fading environments ...(SC) ... See full document

... MC-DS-CDMA code acquisition scheme parameterised with the number of antennas, when using U =4 ...high diversity order, which is determined by the number of subcarriers ...frequency ... See full document

... differentially coherent and noncoherent code acquisition system scenarios, even though the degree of performance degradation depends upon the specific scheme ...of transmit antennas in a MIMO-aided ... See full document

... spectrum CDMA systems (DS/CDMA) are becoming widely accepted and promise to play a key role in the future of wireless communications applications because of their efficient use of the channel ... See full document

... The paper is structured as follows. In Section 2, we introduce an MC-DS-CDMA system model where lin- ear signal processing operations (either in the time do- main or in the frequency domain) are simply ... See full document

... 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] ... See full document

... This layered ST architecture forms the basis for the class of orthogonal decomposable coded ST codes presented in this paper. The Alamouti ST block codes are members of this class of codes [3, 6]. The condition of ... See full document

... Abstract— An asynchronous binary DS-CDMA system using random spreading sequences is considered when communicating over various fading channels. New closed-form expressions are derived for the conditional ... See full document

... as CDMA chip-decoders at each wavelength filtered through ...equals code-length, P 2 + 2 P ) that can be assumed as a parallel circuit of many single photo-detectors ... See full document

... multipath diversity, where the diversity order is equal to the number of combined multipath ...a code which is independent of the data. The independence of the code distinguishes this from ... See full document