rate cdma
RSS rate cdmaConvergence Analysis of Iteratively Detected Time Hopping and DS-CDMA Ultrawide Bandwidth Systems by EXIT Charts
White Paper This paper presents a novel analysis on the decoding convergence of Time Hopping (TH) and Direct Sequence (DS) Code-Division Multiple-Access (CDMA) Ultrawide Bandwidth (UWB) systems when communicating over multipath Nakagami channels. [11 Jul 2008]
Femtocells to speed arrival of next-gen mobile networks?
News Saunders added: "It isn't a technology that we think is specific to just one of the flavours of mobile air interface - UMTS or GSM or CDMA or WiMax, for that matter - we actually think femotcells bring things to all those technologies. [30 Jun 2008]
Performance of MT-CDMA System With Post-Detection Diversity Reception Over Rician Fading Channel
White Paper This paper presents the theoretical analysis for Non-coherent multi-tone code division multiple access (MT-CDMA) system in terms of average bit error rate (BER). Here, the influence of the order of diversity and number of tones is studied for given... [10 Apr 2008]
Comparison of Diverse Optical CDMA Codes Using a Normalized Throughput Metric
White Paper A new method of comparing optical CDMA codes of different families, sizes and weights is described. We outline why the traditional performance metric of bit-error rate versus number of simultaneous users is lacking and propose a new performance... [10 Apr 2008]
Proposal of Adaptive Downlink Modulation Using OFDM and MC-CDMA for Future Mobile Communications System
White Paper In this paper, an adaptive downlink modulation using OFDM and MC-CDMA is presented for maximizing the system capacity and actualizing QoS (Quality of Service) control of future mobile communications. To meet the strong demand for broadband... [10 Apr 2008]
Variable Bit Allocation for FH-CDMA Wireless Communication Systems
White Paper This paper shows that the maximum throughput bit-rate/channel-assignment problem is NP-hard. In the wireless indoor environment, the channel may vary slowly as users and the interferers may move at slow speeds. [10 Apr 2008]
Modeling TCP in a Multi-Rate Multi-User CDMA System
White Paper Modern CDMA wireless channels support multiple transmission rates, which can be dynamically assigned to users based on traffic demand. However, in practice, assignment of high rate channels comes with the penalty of increased power as well as... [28 Feb 2008]
Measured TCP Performance in CDMA 1x EV-DO Network
White Paper This paper investigates the long-lived TCP bulk throughput over the CDMA 1x EV-DO service that provides high-speed \always on" Internet connectivity in a wide-area mobile environment. Although the packet loss rate is low, bursty packet losses... [08 Jan 2008]
TCP-Aware Resource Allocation in CDMA Networks
White Paper The work discusses in this paper explores cross-layer optimization of the rate adaptation feature of cellular networks to optimize throughput of a single long-lived TCP session. Modern cellular networks incorporate RF technology that allows them to... [26 Dec 2007]
Joint Uplink and Downlink Capacity Considerations in Admission Control in Multiservice CDMA/HSDPA Systems
White Paper Those two links are asymmetric in the case of CDMA-based High Data Rate (HDR)/High-Speed Downlink Packet Access (HSDPA) systems, the uplink being much slower than the downlink and thus, in some cases, restrictive in terms of the achievable... [20 Dec 2007]
Performance Evaluation of TCP Under Dynamic Allocation Scheme for Down Link Transmission Rate in W-CDMA Systems
White Paper W-CDMA standardized in 3GPP (standardizing IMT-2000) allows dynamic allocation of transmission rates to flows over a wireless link in response to changing link condition for each flow, which is thought to be essential for next generation mobile... [05 Dec 2007]
CDMA Channel Parameters Maximizing TCP Throughput
White Paper Block codes applied to each packet for forward error correction can also be used, and in that case the joint optimization of the coding rate to maximize TCP throughput is considered. A single TCP session traversing a wireless channel is considered... [30 Oct 2007]
Comparison of W-CDMA and cdma2000
White Paper This advantage of W-CDMA mainly results from the higher coverage of high-bit-rate services.cdma2000's 1xEV systems are technologically exhausted when capacity is concerned, while W-CDMA still holds potential by introducing HSDPA. [03 Aug 2007]
Multi-Code Multicarrier CDMA: Performance Analysis
White Paper A novel multi-code multicarrier code division multiple access (MC-MC-CDMA) system is proposed and analyzed in a frequency selective fading channel. By allowing each user to transmit multiple orthogonal codes, the proposed MC-MC-CDMA system can... [04 Jul 2007]
Multiple Access Protocol for Integration of Variable Bit Rate Multimedia Traffic in UMTS/IMT-2000 Based on Wideband CDMA
White Paper The UMTS Terrestrial Radio Access (UTRA), based on a wideband DS-CDMA technique, fully supports the UMTS requirements and has flexible support for real-time, variable-bit-rate services, as well as an efficient packet mode. [10 Nov 2006]
