Results 1 - 10 of 149

Adaptive Multicode CDMA for Uplink Throughput Maximization

by unknown authors
"... We determine the optimal adaptive rate and power control strategies to maximize the total average throughput in a multicode CDMA system. Peak power and instantaneous bit error rate (BER) constraints are assumed at the transmitter with matched filter detection at the receiver. We first obtain results ..."
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We determine the optimal adaptive rate and power control strategies to maximize the total average throughput in a multicode CDMA system. Peak power and instantaneous bit error rate (BER) constraints are assumed at the transmitter with matched filter detection at the receiver. We first obtain

1Transmission Scheduling Scheme for Multirate Multicode CDMA Networks

by Sangita Subramanian, Tan F. Wong
"... Abstract — In this paper, a simple packet transmission scheduling scheme is proposed for a multicode CDMA network. The scheme opti-mizes the channel capacity and tries to meet the multirate transmission demands of all the users by utilizing information about the arrival rates of the users and the ch ..."
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Abstract — In this paper, a simple packet transmission scheduling scheme is proposed for a multicode CDMA network. The scheme opti-mizes the channel capacity and tries to meet the multirate transmission demands of all the users by utilizing information about the arrival rates of the users

Advanced Detection Scheme for Multicode CDMA with V-BLAST Architecture

by Gang Wu, Haifeng Wang, Ming Chen, Shixin Cheng, Jorma Lilleberg - In Proc. of the IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC , 1999
"... Multicode CDMA with V-BLAST architecture is an attractive scheme to achieve high data rate transmission. We propose an advanced detection scheme, order partial parallel interference cancellation with decision feedback (DF-OPPIC), to combat co-antenna interference and multiple access interference in ..."
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Multicode CDMA with V-BLAST architecture is an attractive scheme to achieve high data rate transmission. We propose an advanced detection scheme, order partial parallel interference cancellation with decision feedback (DF-OPPIC), to combat co-antenna interference and multiple access interference

Time-Varying Fair Queuing Scheduling For Multicode Cdma Based On Dynamic Programming

by A. Stamoulis, N. Sidiropoulos, G.B. Giannakis
"... Fair Queuing (FQ) algorithms, which have been proposed for QoS wireline-wireless networking, rely on the fundamental idea that the service rate allocated to user proportional to a positive weight . Targeting wireless data networks with a multicode CDMA-based physical layer, we develop FQ w ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
Fair Queuing (FQ) algorithms, which have been proposed for QoS wireline-wireless networking, rely on the fundamental idea that the service rate allocated to user proportional to a positive weight . Targeting wireless data networks with a multicode CDMA-based physical layer, we develop FQ

Capacity Estimation for a Multicode CDMA System With Sir-Based Power Control

by Duk Kyung Kim, Dan Keun Sung - IEEE TRANS. VEH. TECHNOL , 2002
"... Capacity estimation in code division multiple access (CDMA) systems is an important issue which is closely related to power control. Strength-based power control has been assumed in most analyses in which other cell interference was considered as a known and fixed variable. However, in signal-to-int ..."
Abstract - Cited by 11 (0 self) - Add to MetaCart
-to-interference ratio (SIR)-based power-control systems, power control and other cell interference are closely related to each other and capacity can be obtained by considering this relationship. This study derives the reverse-link capacity of an SIR-based power-controlled multicode CDMA system supporting heterogeneous

Time-Varying Fair Queueing Scheduling for Multicode CDMA Based on Dynamic Programming

by Anastasios Stamoulis, Nicholas D. Sidiropoulos, Senior Member, Georgios B. Giannakis - IEEE Tran. on Wireless Communications , 2004
"... Fair queueing (FQ) algorithms, which have been proposed for quality of service (QoS) wireline/wireless networking, rely on the fundamental idea that the service rate allocated to each user is proportional to a positive weight. Targeting wireless data networks with a multicode CDMA-based physical lay ..."
Abstract - Cited by 8 (0 self) - Add to MetaCart
Fair queueing (FQ) algorithms, which have been proposed for quality of service (QoS) wireline/wireless networking, rely on the fundamental idea that the service rate allocated to each user is proportional to a positive weight. Targeting wireless data networks with a multicode CDMA-based physical

Cross-Layer Optimization for Multimedia Transport over Multicode CDMA Networks

by Hui Chen, Student Member, Henry C. B. Chan, Victor C. M. Leung
"... Abstract—Most previous work on code division multiple access (CDMA) considers the bit error ratio (BER) at the physical layer and the frame drop ratio (FDR) at the medium access control layer separately. However, a better system performance, e.g., in terms of a lower overall frame loss ratio (FLR), ..."
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), can be achieved if BER and FDR are jointly optimized. In this paper, we propose a cross-layer optimization scheme called traffic-adaptive scheme for multicode CDMA operating over a time division multiple access (TDMA) channel. Based on the traffic condition and buffer status, this scheme employs a

Peak-to-Average Power Ratio Analysis in Multicode CDMA

by K. Sathananthan, C. Tellambura
"... Ratio (PAPR) problem in Multicode-Code Division Multi-ple Access (MC-CDMA) systems. The statistical distribu-tion of PAPR is derived and the achievable PAPR reduc-tion for a given code rate is estimated. We show that the PAPR in MC-CDMA communications systems can be re-duced by Partial Transmit Sequ ..."
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Ratio (PAPR) problem in Multicode-Code Division Multi-ple Access (MC-CDMA) systems. The statistical distribu-tion of PAPR is derived and the achievable PAPR reduc-tion for a given code rate is estimated. We show that the PAPR in MC-CDMA communications systems can be re-duced by Partial Transmit

UNCOORDINATED REAL-TIME VIDEO TRANSMISSION IN WIRELESS MULTICODE CDMA SYSTEMS:

by T Echnologies, An Smpt-based Approach
"... The transport of video over wireless links is a challenging problem due to the stringent playout deadlines of the video frames and the unreliability of the wireless links. We consider the real-time transmission of encoded video from distributed, uncoordinated wireless terminals to a central base sta ..."
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station in a multi-code CDMA system. Our approach is to employ the recently proposed simultaneous MAC packet transmission (SMPT) approach at the data link layer (in conjunction with UDP at the transport layer). We consider the real-time transmission of both video encoded in an open loop (i.e., without

MAC Packet Transmission (SMPT) in a Multicode CDMA Wireless System

by Manjunath Krishnam, Student Member, Martin Reisslein, Senior Member, Frank Fitzek - Dept. Elect. Eng., Arizona State Univ, Tempe, AZ. [Online]. Available: http://www.fulton.asu.edu/~mre , 2004
"... Stabilizing the throughput over wireless links is one of the key challenges in providing high-quality wireless multimedia services. Wireless links are typically stabilized by a combination of link-layer automatic repeat request (ARQ) mechanisms in conjunction with forward error correction and other ..."
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the parallel code channels provided by multicode code-division multiple access. SMPT stabilizes the wireless link by transmitting multiple packets in parallel in response to packet drops due to wireless link errors. While these parallel packet transmissions stabilize the link layer throughput, they also
Results 1 - 10 of 149