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CDMA-Gone With The Wind?
White Papers This white paper presents the main issues in the world CDMA market. Lately, there have been many rumors and doubts over the future of CDMA, and these are expected to have an impact on the main CDMA handset manufacturers, especially in Korea and...
[September 20, 2007, 0:00]
CDMA-Based MAC Protocol For Wireless Ad Hoc Networks
White Papers This paper proposes a CDMA-based power controlled medium access protocol for mobile ad hoc networks (MANETs). Channel-gain information obtained from overheard RTS and CTS packets over an out-of-band control channel is used to dynamically bound the...
[August 1, 2004, 0:00]
CDMA As A Multiprocessor Interconnect Strategy
White Papers A binary CDMA bus is proposed as a communications interconnect for multiprocessor systems. The binary CDMA bus is a digital bus which incorporates spread-spectrum technology to encode multiple data streams in parallel onto the same physical...
[January 11, 2006, 23:00]
CDMA Matched Filter Implementation In Virtex Devices
White Papers CDMA is a technique used for wireless data transmission. CDMA base stations must be able to discriminate these different code sequences in order to distinguish one transmission from another. Every mobile handset and every wireless base station...
[July 25, 2004, 0:00]
CDMA Base Station Range Extension System (C-BRES)
White Papers The Oberon Cellular CDMA Base station Range Extension System (C-BRES) is designed to facilitate rapid range extension of a Cellular CDMA BTS for the US Army CECOM. The C-BRES is a two part system which can quickly and economical provide additional...
[July 25, 2004, 0:00]
CDMA End-to-End Security
White Papers Code Division Multiple Access (CDMA) technology originated from military applications and cryptography, and to date, do not have any report of high-jacking or eavesdropping on a CDMA call in a commercially deployed network.
[October 11, 2005, 0:00]
Novell Case Study: QUALCOMM CDMA Technologies
White Papers QUALCOMM Incorporated is a leader in developing and delivering innovative digital wireless communications products and services based on the company's CDMA digital technology. After evaluating the AMD Opteron processor, QCT decided to move much of...
[April 13, 2007, 0:00]
Repeaters For Indoor Coverage In CDMA Networks
White Papers This white paper focuses on the application of repeaters to extend CDMA network coverage indoors, including guidelines for the use of a passive distributed antenna system that is fed by a repeater. While targeting the use of repeaters for indoor...
[July 25, 2007, 0:00]
Inducing Multiscale Clustering Using Multistage MAC Contention In CDMA Ad Hoc Networks
White Papers This paper proposes a new principle for designing MAC protocols for CDMA based ad hoc networks - inducing spatial clustering in contending transmitters/receivers. The paper first highlights the advantages of CDMA in handling Quality of Service (QoS...
[August 10, 2007, 0:00]
Comparison Of W-CDMA And Cdma2000
White Papers The comparative investigation of these 3G alternatives reveals that system capacities are more or less in the same range, with slight advantage of W-CDMA when using comparable transmission technologies and channel conditions.
[August 3, 2007, 0:00]
Capacity Of CDMA Systems
White Papers This paper presents an overview of the Capacity of Code Division Multiple Access (CDMA) Systems. In the past decade, it has been shown that CDMA is the most suitable multiple access transmission technology for Mobile Communications and all the 3rd...
[August 1, 2007, 0:00]
Joint Uplink And Downlink Capacity Considerations In Admission Control In Multiservice CDMA/HSDPA Systems
White Papers 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...
[December 20, 2007, 23:00]
Data-Aided Channel Estimation For MC-CDMA Systems With Transmit Diversity In Wireless Channels
White Papers This paper will address the problem of data-aided channel estimation in an MC-CDMA system with multiple transmitting antennas. First, the paper takes into consideration a method proposed for OFDM with transmit diversity that relies on the frequency...
[July 29, 2004, 0:00]
Switched Beam Smart Antenna BER Performance Analysis For 3G CDMA Cellular Communication
White Papers The purpose of this paper is to give a performance analysis of Switch Beam Smart Antenna (SBSA) and its comparison with conventional CDMA systems. The technology of smart antenna for mobile communications has received enormous interest worldwide in...
[July 29, 2004, 0:00]
Congestion Control Policies For IP-Based CDMA Radio Access Networks
White Papers As CDMA-based cellular networks mature, the current point-to-point links used in connecting base stations to network controllers will evolve to an IP-based Radio Access Network (RAN) for reasons of lower cost due to statistical multiplexing gains...
[July 29, 2004, 0:00]
Performance Evaluation Of TCP Under Dynamic Allocation Scheme For Down Link Transmission Rate In W-CDMA Systems
White Papers 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...
[December 5, 2007, 23:00]
Iterative Transmitter And Receiver Optimization For CDMA Networks
White Papers Optimization of the capacity of a single-cell Code Division Multiple Access (CDMA) system, both from the perspective of the maximum number of users that can be served at a required quality of service level and from the information theoretic...
[July 29, 2004, 0:00]
Blind Multiuser Detection In Uplink CDMA With Multipath Fading: A Sequential EM Approach
White Papers This paper considers joint channel estimation and data detection in uplink asynchronous CDMA systems employing periodic (long) spreading sequences in the presence of unknown multipath fading. Since maximum-likelihood sequence estimation is too...
[July 29, 2004, 0:00]
A Low Power MMSE Receiver For Multi-Carrier CDMA
White Papers The power consumption of a minimum mean square error (MMSE) multi-carrier CDMA receiver implemented in digital hardware is considered. Simulations using data consistent with typical performance of a multi-carrier CDMA receiver indicate that the...
[July 29, 2004, 0:00]
Congestion Sensitive Downlink Power Control For Wideband CDMA Systems
White Papers This paper presents a model for efficient and robust power control in the downlink of Wideband CDMA wireless systems. The model is based on microeconomics, and takes into account both the congestion, in terms of increased interference, that a...
[July 29, 2004, 0:00]
