DS-CDMA radio systems
A resource allocation approach to control interference in Multi Carrier DS CDMA systems
... single-carrier systems under multi-cell case ...available radio resources and also has proposed a global priority function for scheduling the users waiting in queue in the next scheduling instant or TTI ...
8
Zero Forcing and Minimum Mean Square Error Multiuser Detection in Generalized Multicarrier DS CDMA Systems for Cognitive Radio
... Figure 5 shows the BER performance of the MC DS- CDMA system using both the OZF-MUD and SZF-MUD and supporting K = 31 users, when communicating over frequence-selective fading channels. From the results of ...
13
A Unified Approach to the Analysis of Multicarrier DS CDMA over Nakagami $M$ Fading Channels
... (CDMA) systems based on the combination of CDMA and orthogonal fre- quency division multiplexing (OFDM) schemes - which is referred to as multicarrier CDMA (MC-CDMA) - has drawn a lot ...
5
Software Defined Radio Assisted Adaptive Broadband Frequency Hopping Multicarrier DS CDMA
... cellular systems are designed for the worst-case channel condi- tions, typically achieving adequate voice quality over 90–95 percent of the coverage area for voice users, where the signal to interference plus ...
10
Binary De Bruijn sequences for DS CDMA systems: analysis and results
... of radio spectrum, and the delivery of high capacity to a multitude of final users may be achieved through the adoption of multi- user communication ...common radio network, to resist against interference, ...
12
ADAPTIVE CODE TO USER ALLOCATION FOR INTERFERENCE MANAGEMENT ON THE DOWNLINK DS-CDMA SYSTEMS
... 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 ...
11
Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems
... The choice of code greatly depends on the scenario and is se- lected based on its orthogonality, correlation properties, im- plementation complexity and PAPR [4, 12]. Walsh-Hadamard codes are simple to generate ...
5
A Utility Based Downlink Radio Resource Allocation for Multiservice Cellular DS CDMA Networks
... of radio resources, designing a resource control mecha- nism to utilize the network resources efficiently is a crucial task for the next generation cellular communication ...in CDMA cellular networks is a ...
11
A Reed Solomon Coded DS CDMA System Using Noncoherent M ary Orthogonal Modulation over Multipath Fading Channels
... of Radio Engineering and Electronics, Academy of Sciences of the Czech ...spectrum systems for future generations of wireless mobile communication ...
12
Exact BER Calculation of Asynchronous DS CDMA Systems Communicating over Hoyt Channels
... asynchronous DS-CDMA systems using random spreading sequences communicating over Hoyt ...modeling radio channels subject to strong ionospheric scintillation, such as satellite links [28], ...
5
Adaptive Rate DS CDMA Systems using Variable Spreading Factors
... mobile radio communications totaling ap- proximately 8000 pages, published in excess of 450 research papers, organized and chaired conference sessions, presented overview lectures, and has been awarded a number of ...
10
Coherent Code Tracking for Spatial Transmit Diversity DS-CDMA Systems
... The radio propagation conditions in this work are modelled based on the following assumptions. Firstly there is no line- of-sight component between transmitter and receiver. Sec- ondly the mobile device is in ...
9
Performance of Generalized Multicarrier DS CDMA over Nakagami $m$ Fading Channels
... of Radio Engineering and Electronics, Academy of Sciences of the Czech ...ultrawide-band CDMA systems for the advanced wireless mobile communication ...
11
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 ...
9
Distributed Resource Allocation Assisted by Intercell Interference Mitigation in Downlink Multicell MC DS CDMA Systems
... MC DS-CDMA will be at the order of the number of time domain resolvable paths of wireless channels and, hence, will usually be low ...MC DS-CDMA can be a promising solution for supporting ...
16
Equivalence of Linear MMSE Detection in DS CDMA and MC CDMA Systems over Time and Frequency Selective Channels
... (CDMA) systems in time and frequency selective ...different CDMA systems as special ...different CDMA systems operating over purely frequency selective and purely time selective ...
20
Differential Space Time Block Code Modulation for DS CDMA Systems
... Recently, Alamouti [2] proposed a simple and useful transmit diversity scheme to improve the overall perfor- mance of wireless communication systems in flat fading channels. This scheme is one of many interesting ...
8
Blind Multiuser Detection by Kurtosis Maximization for Asynchronous Multirate DS/CDMA Systems
... multirate DS/CDMA systems, discrete-time multi- ple-input multiple-output (MIMO) signal models can be formulated through chip-rate sampling of the received continuous-time signal followed by ...
17
Slow Frequency Hopping Multicarrier DS CDMA for Transmission over Nakagami Multipath Fading Channels
... SFH/MC DS-CDMA system is actually reduced to a con- ventional MC DS-CDMA ...SFH/MC DS-CDMA system is significantly lower, than that of the corresponding conventional SC ...
11
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] ...
5