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Frequency Bands for Broadband Wireless Access
White Papers At the 27th RSAC meeting various frequency bands available for allocation for Worldwide Interoperability for Microwave Access ("WiMax") were discussed. In RSAC it was considered that the 3.4 - 3.6 GHz band is a candidate band for WiMax.
[March 21, 2006, 0:01]
Frequency Tuner
Downloads Frequency Tuner is a program that can measure the frequency of a sound and convert it to a note. Frequency Tuner can be used to tune different instruments. Frequency Tuner was tested to tune guitar, piano, and flute.
[March 20, 2003, 18:15]
Design of Robust Pulses to Carrier Frequency Offset for OFDM/OQAM System
White Papers The high sensitivity to carrier frequency offset of OFDM systems compared to single carrier systems is well known. This paper studies how this can be remedied for OFDM/OQAM systems by appropriate pulse shaping.
[April 11, 2007, 1:01]
Cooperative STBC-OFDM Transmissions With Imperfect Synchronization in Time and Frequency
White Papers This paper studies the cooperative STBC-OFDM transmissions when the cooperative transmitters are not perfectly synchronized in time and carrier frequency. While OFDM can effectively resolve the limited delay asynchronism among the transmitters, the...
[April 13, 2007, 1:01]
A Combined Timing and Frequency Synchronization and Channel Estimation for OFDM
White Papers This paper addresses training signal based combined timing and frequency synchronization and channel estimation for OFDM systems. At the first stage, coarse timing and frequency offset estimates are obtained.
[April 13, 2007, 1:01]
Optimal Training Signals for SISO OFDM Channel Estimation in the Absence/Presence of Frequency Offsets
White Papers All existing training signal designs for channel estimation in OFDM systems assume no frequency offsets. In practice, frequency offset is unavoidable and seriously degrades the performance of OFDM systems.
[April 11, 2007, 1:01]
CPU Frequency Scaling
Blog A few days ago, the light finally came on in my head.maybe the CPU frequency scaling wasn't working? It didn't take long to find out, just add the Gnome CPU Frequency Scaling Monitor to the panel, and sure enough it was running at 1.6 GHz constantly.
[April 3, 2009, 14:03]
Performance of Antenna Selection for MIMO-OFDM Systems Based on Measured Indoor Correlated Frequency Selective Channels
White Papers This paper presents and compares antenna selection strategies for frequency selective MIMO-OFDM channels. Real channels are measured, and used to evaluate performance. Results for simulated TGn channel models are also presented.
[April 11, 2007, 1:01]
Clock frequency race hots up
News Judging by details revealed in a chip conference agenda, the clock frequency race isn't over yet. IBM's Power6 processor will be able to exceed 5GHz (five gigahertz) in a high-performance mode, and the second-generation Cell Broadband Engine...
[January 2, 2007, 8:23]
Multi-User Frequency Domain Scheduling for WiMAX OFDMA
White Papers This paper introduces the performance analysis of 802.16e OFDMA system in UL mode with respect to multi-user scheduling algorithms in frequency domain. It is shown that multi-user scheduling in frequency domain potentially can greatly improve OFDMA...
[April 23, 2009, 1:24]
Performance of an Adaptive Multiuser OFDM Uplink With Carrier Frequency Offsets
White Papers Using an OFDM based uplink for the future cellular network has been controversial issue due to difficulties in time and frequency synchronization and high Peak-to-Average Power Ratio (PAPR). In this paper, a model is provided to quantify the...
[April 11, 2007, 1:01]
A Blind Frequency Offset Estimator for OFDM/OQAM Systems
White Papers Like other OFDM-like systems, OFDM/OQAM systems are very sensitive to carrier frequency offset. A new blind carrier frequency estimator is introduced herein for OFDM- /OQAM systems by exploiting the non-circularity of the received signal.
[April 11, 2007, 1:01]
Impact of the Propagation Environment on the Performance of Space-Frequency Coded MIMO-OFDM
White Papers Previous work on space-frequency coded MIMOOFDM has been restricted to idealistic propagation conditions. In this paper, using a broadband MIMO channel model taking into account Ricean K-factor, transmit and receive angle spread, and antenna...
[October 26, 2004, 0:00]
Radio Frequency Identification (RFID) as a Fixed Asset Management Solution
White Papers Radio Frequency IDentification (RFID) is an emerging technology with many successful applications including animal tagging, security access, retail loss prevention, automated toll collection and warehouse management.
[May 10, 2006, 1:00]
Feasibility of Adaptive Transmission for Multicarrier and Frequency Hopping Mobile Radio Systems
White Papers The paper describes the design and performance of adaptive transmission methods enabled by the Long Range Fading Prediction algorithms (LRP) for Orthogonal Frequency Division Multiplexing (OFDM) and slow Frequency-Hopping Spread Spectrum (FH/SS...
[August 10, 2007, 10:45]
Joint Time-Domain Tracking of Channel and Frequency Offset for OFDM Systems
White Papers This paper addresses the problem of joint channel and frequency offset estimation and tracking for OFDM systems. The channel taps and the frequency offset are estimated in time-domain while equalization is performed in frequency domain.
[April 11, 2007, 1:01]
Virgin Atlantic Airways Pilots Radio Frequency Identification With Oracle and Tata Consultancy Services
White Papers TCS) customer, agreed to conduct a Radio Frequency IDentification (RFID) pilot to RFID tag critical parts used in aircraft maintenance and repairs at its Heathrow Airport warehouse in the UK. Since it was founded in 1984, Virgin Atlantic Airways...
[October 6, 2006, 0:00]
A Reduced Complexity, Improved Frequency Offset Estimation for OFDM-Based WLANs
White Papers This paper presents a reduced complexity frequency offset estimation method as a modification to the nonlinear least square (NLS) method. The complexity reduction is achieved by utilizing the Chirp-Z transform.
[April 13, 2007, 1:01]
Network-Critical Physical Infrastructure for Radio Frequency Identification (RFID) Systems
White Papers Radio Frequency IDentification (RFID) technology helps automate a variety of business processes, improving their efficiencies. It generates a huge volume of data that needs to be filtered, processed and stored, and generally requires its own...
[February 24, 2006, 0:01]
Understanding the Key Issues in Radio Frequency Identification (RFID)
White Papers Radio frequency identification (RFID) is an automated data collection (ADC) system that enables businesses to wirelessly capture and move data using radio waves. A typical system consists of "tags" with an embedded, unique identifier for the...
[August 2, 2005, 0:00]
