Sponsored White Papers, Webcasts, and Downloads
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- Iterative Power Control for Imperfect Successive Interference Cancellation
- Successive interference cancellation SIC is a technique for increasing the capacity of cellular code-division multipleaccess CDMA systems. To be successful, SIC systems require a specific distribution of the users' received powers, especially in the inevitable event of imperfect interference cancellation. This apparent complication of standard CDMA power control has been...
- Tags: CDMA, IEEE, Complication, Successive Interference Cancellation, Cellular Phones, Consumer Electronics, Personal Technology
- White papers 2005-05-01
- Multiuser Interference Cancellation for OFDM Systems With Frequency Offset
- This paper proposes a method to counteract the effect of different frequency offsets of the users in a OFDMA uplink system with frequency selective Rayleigh fading channel. The multiple access interference is reduced by reconstructing and removing the interfering signals. This is done by accomplish Successive or Selective Cancellation. The...
- Tags: Frequency, Access Interference, OFDM, Wireless
- White papers 2003-07-15
- Capacity Gains of Single Antenna Interference Cancellation in GSM
- Single Antenna Interference Cancellation SAIC is a very interesting and promising technology currently being standardized in 3GPP as part of GERAN Release 6. This interference reduction technique takes advantage of the latest developments in signal processing and receiver algorithms in a cost-efficient way. In most advantageous interference conditions, SAIC can...
- Tags: Algorithm, Nokia Corp., Network, GSM, Single Antenna Interference Cancellation, Engineering, Cellular Phones, Networking, Consumer Electronics, Personal Technology
- White papers 2004-05-27
- Transmission Capacity of Wireless Ad Hoc Networks With Successive Interference Cancellation
- The transmission capacity of a wireless ad hoc network can be defined as the maximum allowable area spectral efficiency such that the outage probability does not exceed some specified threshold. This paper studies the improvement in transmission capacity obtainable with successive interference cancellation SIC, an important receiver technique that has...
- Tags: Transmission Capacity, Wi-Fi, Wireless, Networking
- White papers 2005-08-19
- The Impact of Fading on the Performance of Large CDMA With Parallel Interference Cancellation
- In this paper, the large-system performance of a multistage first-order linear Partial Parallel Interference Cancellation PPIC receiver for a synchronous Direct-Sequence Code Division Multiple Access (DS-CDMA) system over a frequency-flat fading channel is addressed. This performance is evaluated by simulating the moments of the eigenvalues of a random covariance matrix....
- Tags: Performance, CDMA, Concordia University, Performance Management, Human Resources, Workforce Management
- White papers
- Adaptive Joint Interference Cancellation and Space-Time Block Decoding for IEEE 802.11b WLAN Systems
- Digital transmission in Wireless Local Area Networks WLANs according to the IEEE 802.11b standard suffers from fading, InterSymbol Interference ISI, and Co-Channel Interference CCI. In this paper, receivers with Joint Interference Cancellation and time reversal Space-Time block Decoding JICSTD are proposed for an enhanced version of the IEEE 802.11b WLAN...
- Tags: IEEE 802.11, University Of British Columbia, Wireless LANs, Wi-Fi, Wireless, LANs, Networking
- White papers 2006-04-03
- Win32 I/O Cancellation Support in Windows Vista
- This whitepaper is intended for Independent Software Vendors and others interested in leveraging new cancellation support to improve the robustness of their Windows applications. This enables improved customer experience through direct cancellation of and recovery from slow or blocked file input/output. Windows Vista provides kernel and driver enhancements, as well...
- Tags: Cancellation, Win32, Microsoft Windows Vista, Microsoft Windows, Operating Systems, Software
- White papers 2005-09-01
- Frequency Shift Based Multiuser Canceller for DS-CDMA Systems
- The cyclostationary properties of Direct Sequence Spread Spectrum signals are well known. These cyclostationary properties imply a redundancy between frequency components separated by multiples of the symbol rate. This paper presents a Multiple Access Interference Canceller that explores this property and applies to UMTS-TDD. The results show total cancellation of...
- Tags: Property
- White papers
- Modeling and Simulation of IEEE 802.11 Wireless-LAN and Bluetooth Piconet Range Interference
- The proximity of wireless devices with one another often results in interference in the unlicensed 2.4 GHz ISM bandwidth. Interference has been recognized as a major problem to wireless network performance and improvement. This paper reports a proposed and investigated Interference Range Model IRM, a model that allows a user...
- Tags: IEEE 802.11, Interference, Modeling, Wi-Fi, Performance Management, Research & Development, Wireless, Wireless LANs, Bluetooth, Human Resources, Workforce Management, Business Operations
- White papers 2004-09-20
- CDMA Sparse Channel Estimation Using a GSIC/AM Algorithm for Radiolocation
- This paper considers channel parameter estimation in a sparse channel environment for radiolocation. The Generalized Successive Interference Cancellation GSIC algorithm is used to eliminate the Multiple Access Interference MAI. To adapt GSIC to sparse channels the Alternating Maximization AM algorithm is considered and the continuous time delay of each path...
- Tags: Estimation, Algorithm, CDMA, University Of California, Generalized Successive Interference Cancellation Algorithm, Engineering
- White papers
- RF Interference in Home Networks
- Interference can lead to performance reduction of wireless devices. This paper points out the different types of interference on a Bluetooth device and introduces a possible solution to prevent interference. The new solution is a software implementation which requires no hardware adjustments. After simulation some points of improvements are found...
- Tags: Solution, Network, Home Network, Interference, Performance Management, Wi-Fi, Wireless, Human Resources, Workforce Management
- White papers 2005-06-01
- Iterative Interference Cancellation and Channel Estimation for Mobile OFDM
- In mobile reception, the reliability of Orthogonal Frequency Division Multiplexing OFDM is limited because of the time-varying nature of the channel. This causes InterCarrier Interference ICI and increases inaccuracies in channel tracking. This paper models the ICI using derivatives of the channel amplitude. This allows the authors to design a...
- Tags: Mobile, IEEE, Advertising & Promotion, OFDM, Marketing, Wireless
- White papers 2005-01-01
- Evaluating Interference in Wireless LANs: Recommend Practice
- Radio interference remains a core concern among Wireless LAN WLAN users, network administrators, and operations staff alike. After all, the potential for interference is a fact of life in the unlicensed bands where WLANs operate, and, even worse, it is often very difficult to evaluate the effects of interference on...
- Tags: Interference, WLAN, Wireless LANs, LANs, Wi-Fi, Wireless, Networking
- White papers 2006-09-01
- NoiseFree VoIP (html)
- NoiseFree VoIP is a product developed to service VoIP, which is a rapidly growing call service platform. Unfortunately for the multitudes of users that rely on it for cost-effective mobile communications, there is no native noise cancellation or noise management capability. This limitation can turn important business and personal calls...
- Tags: HTML, Cancellation, NoiseFree VoIP, NoiseFree, Telephony, VOIP, Telecommunications, Networking
- Software downloads 2007-10-23
- RF interference: Just how important are antennas
- Being able to co-locate multiple RF systems within millimeters of each other in modern wireless devices is in large part due to reducing RF interference. Many of these "interference-busting" innovations are the result of engineers making improvements to antenna systems. by Michael Kassner
- Tags: Radio Frequency, Radio, Antenna, Radio Frequency Isolation, Ruckus Wireless, Q, Equipment Developer, Advertising & Promotion, Network Technology, Marketing, Networking, Michael Kassner
- Blog posts 2008-06-15
- A RAKE Receiver With ICI/ISI Equalizer for CCK Wireless LAN Modem
- This paper proposes a new type of RAKE receiver for complementary code keying CCK codes, which is suitable for the multipath environment with large delay spread. As the delay spread is larger, Inter-Symbol Interference ISI and Inter-Chip Interference ICI generated due to multipath environments are increased. To handle the increasing...
- Tags: IEEE, ISI, Productivity
- White papers 2005-10-03
- VaxVoIP SIP ActiveX SDK (zip)
- VaxVoIP SIP SDK provides tools and components to add SIP Session Initiation Protocol based IP-telephony make and receive phone calls feature in your Web pages and software applications. It delivers voice quality by integrating advanced digital voice processing features including acoustic echo cancellation, noise cancellation, and adaptive jitter buffering.
- Tags: SIP, Cancellation, VaxVoIP SIP SDK, Session Initiation Protocol (SIP), Emerging Technologies
- Software downloads 2006-01-25
- The Invisible Threat: Interference and Wireless LANs
- Interference is a fact of life in the unlicensed bands used by Wireless LANs WLANs, and is an increasing challenge in all WLAN environments - the enterprise, outdoors (including metro-scale Wi-Fi meshes), and in the residence. As the number of unlicensed devices grows and as ever more mission-critical applications are...
- Tags: Interference, WLAN, Wireless LANs, LANs, Wi-Fi, Wireless, Networking
- White papers 2006-10-01
- Performance Analysis of Bluetooth Piconets Under Mutual Interference Using Bit Error Rate
- In this paper, the performance of the Bluetooth piconets under the mutual interference is analyzed. As a performance measure, the packet error probability PEP is used. The PEP is obtained from the bit error rate BER and the collision length of packet. Not only the hit probability but also the...
- Tags: Performance, Interference, Analysis, Packet Error Probability, Bluetooth, Performance Management, Wi-Fi, Wireless, Human Resources, Workforce Management
- White papers 2005-09-20
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