Sponsored White Papers, Webcasts, and Downloads
ZDNet Dictionary Definition
- OFDM
- Orthogonal Frequency Division Multiplexing A digital transmission technique that uses a large number of carriers spaced apart at slightly different frequencies. Although frequency division multiplexing FDM implies multiple...
- Full OFDM Definition >>
ZDNet Resources
- Optimal Training Signals for MIMO OFDM Channel Estimation in the Presence of Frequency Offset and Phase Noise
- The authors develop robust Mean-Square Error MSE-optimal training signal designs for multiple-input multiple-output orthogonal frequency-division multiplexing channel estimation with frequency offset and Phase Noise PN, and present analytical and simulation results for the frequency-offset and PN effects on channel estimation. The proposed designs are more advantageous for moderate-to-high values of...
- Tags: Frequency, Training, MIMO-OFDM, Channel Estimation, OFDM, Workforce Management, Wireless, Human Resources
- White papers 2006-10-01
- High Performance Viterbi Decoder for OFDM Systems
- It is well-known that, for systems that deploy conventional convolutional codes, a Viterbi decoder is the best solution in maximum likelihood sense to decode an information sequence. Typically, a Viterbi decoder uses Euclidean or Hamming distance as a metric. The use of a conventional metric leads to a high performance...
- Tags: Frequency, High-performance, University Of California, OFDM, Leadership, Performance Management, Wireless, Management, Human Resources, Workforce Management
- White papers 2006-04-05
- Joint Time-Domain Tracking of Channel and Frequency Offset for OFDM Systems
- This paper addresses the problem of joint channel and frequency offset estimation and tracking for OFDM systems. The proposed method is based on Extended Kalman filtering. The channel taps and the frequency offset are estimated in time-domain while equalization is performed in frequency domain. Simulation results demonstrate accurate tracking capability...
- Tags: Frequency, Channel, Method, OFDM, Wireless
- White papers 2006-03-21
- A Space-Time Receiver for MIMO-OFDM Ad Hoc Networks
- This paper proposes a receiver architecture that can demodulate multiple data streams with different frequency offsets and propagation delays in Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) ad hoc networks. The receiver performs joint synchronization and interference cancellation to separate these interfering data streams and achieve synchronization for...
- Tags: Frequency, University Of Texas, MIMO-OFDM, Receiver, OFDM, Wireless
- White papers 2006-03-01
- 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
- A Blind Frequency Offset Estimator for OFDM/OQAM Systems
- 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. Since the received signal exhibits conjugate cyclic frequencies at twice the carrier frequency offset, a frequency...
- Tags: Frequency, Texas A&M University, OFDM, Wireless
- White papers
- Joint Channel and Frequency Offset Estimation for OFDM Systems
- In this paper, a joint channel and frequency o set estimation algorithm is proposed. The time variation of the effective Channel Impulse Response CIR due to frequency o set is tracked using a channel tracker. This variation is used to estimate the frequency o set as well as the actual...
- Tags: Algorithm, Frequency, OFDM, Engineering, Productivity, Wireless
- White papers
Additional Resources
- HardInfo 2008 Enterprise (zip)
- All-in-one System Information, Diagnostic, Network Audit and Monitor, Hardware Inventory, Benchmark and Computer Management application designed to be used by Small Business to Large Business and Professionals. HARDiNFO 2008 displays the hardware information in well organized categories with high quality graphical representation of each hardware component for fast and easy...
- Tags: Monitor, Network, Hardware, Ultimate Systems, HardInfo 2008, HARDiNFO 2008 Enterprise
- Software downloads 2008-07-22
- DIRECTV: Well HERE's Your Problem, Ma'am...
- Shortly after I posted my diatribe on my problems with my DIRECTV HD receivers and the company's horrible customer service, I was contacted by Stuart Sweet, a moderator on a popular Satellite TV forums site, DBSTalk. Apparently, my post had created quite a stir and I was asked to register...
- Tags: Digital Video Recorder, DirecTV, Satellite, TVs, Tv & Home Theater, Personal Technology, Home Entertainment, Jason Perlow
- Blog posts 2008-07-20
- D-Link Xtreme N Duo Media Router DIR-855 - wireless router
- We pitted the D-Link Xtreme N Duo Media Router DIR-855 against the only other true dual-band router we've reviewed, the Linksys WRT610N. The DIR-855 beat the WRT610N in overall throughput performance, but its design and desktop setup application couldn't compete. Both routers offer about the same range; the WRT610N provides...
- Tags: Home networking, Routers & switches, Network technology, NETWORKING, WCN, wireless, wireless router, D-Link DIR-855, D-Link Systems, router, Linksys WRT610N
- Product reviews 2008-07-18
- Linksys WRT610N Simultaneous Dual-N Band Wireless Router
- Editor's note: Although our First Look video states that the WRT610N costs only $149, the street price may prove higher.The Linksys WRT610N Simultaneous Dual-N Band Wireless Router is the first true dual-band wireless router we've reviewed, and one of only a few on the market. In our tests, it easily...
- Tags: Home networking, Routers & switches, Network technology, Network-attached storage (NAS), NETWORKING, wireless router, Storage Link, WRT610N, Linksys Inc., router, Linksys WRT310N, storage
- Product reviews 2008-07-17
- Top online ad campaigns by fast food chains
- Advertiser Ad views, 000 Share of ads Unique ad viewers, 000 Frequency McDonald’s 295,884 33.6% 51,897 5.7 Quiznos.com 98,041 11.1% 16,390 6.0 KFC.com 84,974 9.6% 12,620 6.7 PapaJohns.com 82,298 9.3% 17,115 4.8 Subway 8,150 8.9% 15,478 5.0 Dunkin’...
- Tags: Food, Advertisement, Online Advertising, Food & Beverage, Manufacturing, NB
- Blog posts 2008-07-17
- MKN PerformanceMonitor (exe)
- MKN PerformanceMonitor shows detailed information about system, I/O, and processor performance. It creates performance graphs for each installed processor, and the system I/O history. MKN PerformanceMonitor shows information about each processor core in the system, including the CPU usage, the KERNEL mode time, hardware processor usage, and the processor's current...
- Tags: I/O, CPU, MKN Software, Processors, Semiconductors, Hardware, Components
- Software downloads 2008-07-17
- Sun Exec: Your 'Eco Data Center' doesn't have to cost millions. Some tips for getting there.
- OK, so here's the $100 million question: Do you really want to spend that much to make your data center more green or at least more efficient? I thought not, which is why I agreed to speak with Sun Chief Technologist for EcoDC and Virtualization Services, Phillip Morris, about more...
- Tags: Data Center, Virtualization, Sun Microsystems Inc., Data Centers, Storage, Hardware, Data Management, Heather Clancy
- Blog posts 2008-07-16
- Rhymesaurus Free Edition (exe)
- Rhymesaurus Free Edition is a completely free rhyming dictionary program for Windows. Includes over 35,000 words. Type in any word to get a list of words that rhyme with it, as well as a list of common idioms, phrases, and cliches that rhyme with your word. Results are organized by...
- Tags: Word, Purple Room Publishing, Rhymesaurus Free Edition, Results, Microsoft Windows, Operating Systems, Software
- Software downloads 2008-07-15
- DOT11 Monitor (exe)
- Enterprise Wi-Fi deployments have become mission critical. Mobile users are dependent upon a robust radio frequency RF connection between their mobile client device and the network infrastructure. Disconnects between the mobile client device and the network infrastructure are disruptive, and, because of the nature of the radio frequency signal, can...
- Tags: Monitor, Mobile, Radio Frequency, Radio, Oberon, Mobile User, Advertising & Promotion, Network Technology, Marketing, Networking
- Software downloads 2008-07-10
- 2009 Mercedes-Benz SLK350
- Photo gallery:2009 Mercedes-Benz SLK350Although the 2009 Mercedes-Benz SLK350 looks tiny, the car is filled with much more tech and horsepower than you would expect. Mercedes-Benz updated the little roadster for the 2009 model year, giving it new styling cues, improving the engine, and loading it with its newest raft of...
- Tags: Digital music, Digital media, Apple iPod, Mercedes-Benz SLK350, Mercedes-Benz
- Product reviews 2008-07-08
- What's next for the MacBook Air?
- What's next for the MacBook Air?Interchangable batteries go against the Air's designAdding an interchangable battery to the MacBook Air would add enough bulk and weight for it to no longer be a MacBook Air. Before the MacBook Air gets interchangable batteries, the other MacBooks will get more Air-like: thinner &...
- Tags: Engineering, Notebooks, Digital music, Digital media, battery, MacBook Air, Apple MacBook, laptop computer
- Discussion threads 2008-07-07
- Phillips DC912
- When it comes to iPod speaker systems, there are at least three criteria for most shoppers: compatibility it needs to work with your particular iPod model; form factor (it needs to fit into a given space, be it a spacious shelf or tiny nightstand); and value (good sound for the...
- Tags: Digital music, Digital media, Phillips DC912, Apple iPod
- Product reviews 2008-07-03
- Philips GoGear SA2825 (2GB)
- The GoGear SA2825 is one of Philips' most attractive and compact MP3 players. Available in only one color silver and one capacity (2GB), the GoGear SA2825 ($49) offers a healthy amount of features at an affordable price.DesignMeasuring 1.5 inches square and a slender 0.5 inch thick, the GoGear SA2825 is...
- Tags: Digital music, Media players, Digital media, Philips Electronics N.V., GoGear SA2825
- Product reviews 2008-07-02
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