Vaishnavi Ravichandran

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Resource management is one of the most important engineering issues in 3G systems where multiple traffic classes are supported each being characterized by its required quality of service (QoS) parameters. Call admission control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning. Call Admission(More)
This study presents performance of call admission control and resource reservation schemes based on the mobility of the users in WCDMA cellular systems. In order to guarantee the handoff dropping probability, the mobility of the user is predicted based on a realistic mobility model. The mobility prediction scheme used in this study is used to estimate the(More)
Multi carrier CDMA (MC-CDMA) combines the CDMA and OFDM technologies together and potentially offers the advantages of both the technologies. In frequency selective channel, the sub-carrier experiences different amplitude and phase. In frequency domain spreading, the frequency diversity is employed but the best of different sub-carrier conditions are not(More)
People with limited mobility in the U.S. (defined as having difficulty or inability to walk a quarter of a mile without help and without the use of special equipment) face a growing informational gap: while pedestrian routing algorithms are getting faster and more informative, planning a route with a wheeled device in urban centers is very difficult due to(More)
A novel implementation of Inter process communication in CDMA NOC is proposed. In this study, the orthogonality properties of a Walsh code are used to route data packets between the IP-Cores.The asynchronous circuit design with combinational logic (Gate level design) is used for transmission and receiving circuits, along with ip-cores and reduces the(More)
NoC (network On Chip) is an efficient approach to design the communication subsystem between IP Cores in SoC (System on Chip). In this paper a communication infrastructure design using CDMA (Code division multiple access) based shared bus architecture for core-to-core communication in NoC is presented. CDMA has been proposed as an alternative way for(More)
Receiver is designed to meet the multipath channel condition to suppress narrowband interference. The technique used is MIMO-OFDM with QAM in UWB environment. MIMO provide spatial multiplexing which allows direct improvement of capacity by simultaneous transmission of multiple data stream. The emerging Ultra Wideband (UWB) system offers a great potential(More)
–– NoC(network On Chip) is an efficient approach to design the communication subsystem between IP Cores in SoC(System On Chip). In this paper a CDMA(code division multiple access)bus is proposed as a communication interconnect for different IP cores. CDMA has been proposed as an alternative way for interconnect of IP cores in a SoC design, or as a solution(More)
NoC(network On Chip) is an efficient approach to design the communication subsystem between IP Cores in SoC(System On Chip). In this paper a communication infrastructure design using CDMA (Code division multiple access) based shared bus architecture for core-to-core communication in NoC is presented. CDMA has been proposed as an alternative way for(More)
In this paper, the performance of optical code division multiple access (OCDMA) system is studied using differential phase shift keying (DPSK) with balanced detection (BD) and optical thresholding. For the OCDMA-DPSK receiver, the performance parameters (i) bit error rate (BER), (ii) receiver sensitivity and (iii) spectral efficiency for asynchronous(More)