mobile DS-CDMA systems
Differential Space Time Block Code Modulation for DS CDMA Systems
... of DS-CDMA systems in fast time-dispersive fading ...for DS-CDMA (DSTBC-CDMA) ...of DS-CDMA systems with multi- ple antennas at both the base station and ...
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Coherent Code Tracking for Spatial Transmit Diversity DS-CDMA Systems
... Synchronising a RAKE receiver to a multipath channel consists of two stages. Firstly the receiver must identify and select a set of multipath components to recombine in the RAKE structure. This typically involves ...
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Serial Acquisition of DS CDMA Signals in Multipath Fading Mobile Channels
... acquisition systems under the hypothesis that there are multiple cells in the uncertainty region of the PN ...the mobile-to-base station link of a DS-CDMA system utilizing binary phase-shift ...
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Accurate BER Analysis of Asynchronous DS CDMA Systems in Ricean Channels
... Ricean-faded DS-CDMA systems using random spreading [2]–[17], [19], [20] sequences is still an open ...land mobile, as well as picocellular indoor and factory scenarios, where there exist ...
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Subband Adaptive Array for DS CDMA Mobile Radio
... whereas the output SINR of the implicit RAKE de- creases from the value of (14) to the value of (13) de- pending on the delay of the delayed path. When the delay is very large, there may be difference up to 3 dB in the ...
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Blind Reduced Rank MMSE Detector for DS CDMA Systems
... a mobile user to suppress ...for DS-CDMA, based on the multistage Wiener filter in [11], was analyzed in [12] un- der the assumption that the covariance matrix is ...
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ADAPTIVE CODE TO USER ALLOCATION FOR INTERFERENCE MANAGEMENT ON THE DOWNLINK DS-CDMA SYSTEMS
... a mobile radio channel reflected waves arrive with small relative time delays, self interference ...in CDMA systems for two reasons, the 1st reason is inter-symbol interference cancellation and the ...
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Adaptive Rate DS CDMA Systems using Variable Spreading Factors
... of DS-CDMA systems can be increased when the conventional matched-filter-based receiver is em- ...single-cell DS-CDMA system, where the number of active mobile users obeys the ...
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Performance Analysis of Multi User Detectors for Synchronous DS CDMA Systems
... conventional systems utilized either frequency spectrum sharing or timesharing and henceforth there was the restriction on the ...hence CDMA, fixed bandwidth was utilized to oblige numerous users by ...
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Performance of Generalized Multicarrier DS CDMA over Nakagami $m$ Fading Channels
... From 1991 to 1993, he was a Lecturer in the Department of Electrical Engineering, East-China Jiaotong University, China. From 1993 to 1997 he was with the Modern Communications Research Institute, Northern Jiaotong ...
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Nonlinear Multiuser Receiver for Optimized Chaos-Based DS-CDMA Systems
... chaotic systems can be ...communication systems offer increased security of transmission because of the high sensitivity of chaotic signals to parameter and initial condition perturbations, the random-like ...
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Enabling dynamic spectrum access using SS MC CDMA
... By combining frequency domain and time domain dispersal of modulated symbols, two main variants of multi-carrier spread spectrum systems, the MC-CDMA and MC direct sequence CDMA MC-DS-CD[r] ...
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Binary De Bruijn sequences for DS CDMA systems: analysis and results
... This article presented some results about the application of binary De Bruijn sequences in DS-CDMA systems, as user spreading codes. Binary De Bruijn sequences fea- ture great cardinality of the ...
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Analytical Bit Error Rate Performance of DS CDMA Ad Hoc Networks using Large Area Synchronous Spreading Sequences
... LAS DS-CDMA exhibits a sig- nificantly better performance than the family of traditional spreading sequences used in a quasi- synchronous DS-CDMA scenario having a low number of resolvable ...
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Slow Frequency Hopping Multicarrier DS CDMA for Transmission over Nakagami Multipath Fading Channels
... codes C(8,1) and C(8,2). Similarly, a triple-rate (3-rate) system is created by C(8,1), C(8,2) and C(8,4), and a quadruple-rate (4-rate) system is generated by the codes C(8,1), C(8,2), C(8,3), and C(8,4). Let be the ...
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Minimum BER Receiver Filters with Block Memory for Uplink DS CDMA Systems
... Exact BER were derived for a DS-CDMA system using receiver filters with block memory. Based on this expression, a framework was developed for finding linear minimum BER receiver filters with block memory. A ...
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Blind Soft Detection Assisted Frequency Hopping Multicarrier DS CDMA Systems
... 3, for the SFH/MC DS-CDMA system using a constant-weight code CQ; 2v; U in order to activate the subcarriers and using a receiver without the explicit knowledge of the FH pattern - exce[r] ...
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Smart Antenna Based DS-CDMA System Design for Third Generation Mobile Communication
... 2) There will be stronger demands to increase the number of users a base station (BS) can accommodate. The number of users a BS can accommodate is limited by the mutual interference from the users’ signals and other ...
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Influence of laser diode nonlinearities on fibre optic systems supporting direct-sequence code division multiple access signals
... on CDMA system is discussed. In section 4.3, the nonlinear effect on CDMA systems with unequal power is derived and the performance of the system is evaluated using the derived bit-error-rate with ...
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Equivalence of Linear MMSE Detection in DS CDMA and MC CDMA Systems over Time and Frequency Selective Channels
... implementing DS-CDMA sys- tem ...rate systems may make implementing MC-CDMA system ...the systems can perform as well provided that the su ffi cient conditions are ...
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