- CNET NETWORKS UK BUSINESS SITES:
- atlarge.com
- BNET UK
- silicon.com
- SmartPlanet.com
- ZDNet.co.uk
1007 stories on
Sort by: Date | Relevance
News CDMA was the second largest tech - strong in North America and parts of Asia-Pacific, while WCDMA has so far primary been adopted for M2M apps in Japan. Wireless from A to Z Click on the links below to find out more…
[06 May 2008]
News Comparing the two competing technologies to another pair of competing standards - GSM and CDMA - Kellett said GSM is the dominant cellular technology globally because it was first to market. CDMA, on which Sprint Nextel operates, has a stronger...
[11 Apr 2008]
whitepaper Seamless roaming enables a mobile operator's data subscribers to remain continuously connected as they cross network boundaries and use different radio access networks, including Wi-Fi, General Packet Radio Service (GPRS), Code Division Multiple...
[11 Apr 2008]
whitepaper Much of the performance analysis on multiuser receivers for direct-sequence code division multiple-access (CDMA) systems is focused on worst case near-far scenarios. This paper shows that under some conditions, the user capacity of an uplink power...
[10 Apr 2008]
whitepaper 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). The system uses differential binary phase shift keying (DBPSK) modulation and post...
[10 Apr 2008]
whitepaper Prime codes are excellent candidates for use in multiwavelength optical code-division multiple-access (O-CDMA) systems. This paper shows that in an O-CDMA system using two-dimensional single-pulse-per-row codes, a single choice of the number of...
[10 Apr 2008]
whitepaper In IEEE P802.16-REVd/D1-2003 OFDMA-PHY, CDMA-based periodic ranging and bandwidth-request transmissions are transmitted in the same uplink allocations for UIUC = 11. This paper contains suggestions to the improvement of the CDMA-based bandwidth...
[10 Apr 2008]
whitepaper DS-CDMA offers the highest aggregate Mbps/m2 data rates because its CDMA codes are designed from the ground up to support "multi-user" which in this case, means multiple overlapping uncoordinated networks - like two wireless home theater systems...
[10 Apr 2008]
whitepaper Some studies have been done on capacity of a code division multiple access (CDMA) system with mixed multirate sources. This trend comes from the fact that the capacity of a CDMA system is reverse-link limited.
[10 Apr 2008]
whitepaper The performance of optical code-division multiple-access (CDMA) systems with wavelength-hopping/time-spreading codes is compared to that of a wavelength-division multiple-access (WDMA) system. When more than seven wavelengths are available, optical...
[10 Apr 2008]
whitepaper This interference cost results in an increase in the received Eb/Io relative to FDMA, which should be weighted against a reduction in the Eb/Io requirement resulting from using CDMA. A formula that computes the maximum number of users supported per...
[10 Apr 2008]
whitepaper This paper presents some new results on large-system CDMA obtained through the replica method developed in statistical physics. It is found that the spectral efficiency of randomly spread CDMA subject to Gaussian noise and flat fading in the large...
[10 Apr 2008]
whitepaper 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]
whitepaper Recent developments in Per Call Measurement Data (PCMD) provided by network equipment providers and geo-location analysis in CDMA networks offer a path from network-centric to customer-centric network management.
[10 Apr 2008]
whitepaper In this work, this paper proposes and studies algorithms for efficient uplink packet-data scheduling in a CDMA cell. Uplink scheduling in wireless systems is gaining importance due to arising uplink intensive data services (ftp, image uploads etc...
[10 Apr 2008]
whitepaper 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]
whitepaper Parallel interference cancellation (PIC) is a promising detection technique for code division multiple access (CDMA) systems. It has previously been shown that the weighted multi-stage PIC can be seen as an implementation of the steepest descent...
[10 Apr 2008]
whitepaper In this paper, successive intracell interference cancellation (IIC) of the wideband-code division multiple access (W-CDMA) signal at the mobile unit is considered. Three new interference cancellation techniques suitable for the downlink of any CDMA...
[10 Apr 2008]
whitepaper In this paper, the effectiveness of spatial multiplexing in the forward link of cellular CDMA systems with linear (i.e.low complexity) receivers is investigated. Multiple transmit and receive antennas, and the diverse matrix channel they create...
[10 Apr 2008]
whitepaper In the wireless indoor environment, the channel may vary slowly as users and the interferers may move at slow speeds. A frequency-hopped code-division multiple-access system can adapt to the different interference levels in hopping patterns and...
[10 Apr 2008]
Sort by: Date | Relevance
Copyright ©1995-2008 CNET Networks, Inc. All rights reserved. Top of page
