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whitepaper Orthogonal frequency-division multiplexing (OFDM) is robust against frequency selective fading due to the increase of the symbol duration. However, for mobile applications channel time-variations in one OFDM symbol introduce intercarrier...
[16 May 2008]
whitepaper It's amazing how often one needs a symbol or international character when one is creating a document. If one is having trouble finding the symbol or character one is looking for, tip 1 in the paper shows how to locate characters in the Symbol...
[15 May 2008]
whitepaper The user can use the Symbol dialog box to insert symbols, such as ¼ and, or special characters, such as an em dash (-) or ellipsis (&) that are not on the keyboard, as well as Unicode characters. The built-in Symbol font includes arrows, bullets...
[03 May 2008]
whitepaper The user can customize keyboard shortcuts by assigning keyboard shortcuts (or shortcut keys) to a command, macro, font, style, or commonly used symbol. The user can also remove keyboard shortcuts. Reassigning a combination of keys means that one...
[11 Apr 2008]
whitepaper The user can assign keyboard shortcuts (or shortcut keys) to a command, macro, font, style, or commonly used symbol. Microsoft Office Word 2007 includes features that make the software accessible to a wider range of users, including those who have...
[11 Apr 2008]
whitepaper If the user just wants to create a checklist with check boxes that one will check off on paper, one can create a list that uses a box symbol as a bullet. If one just needs a checklist that the user can print, one can make a list where each item has...
[11 Apr 2008]
whitepaper Orthogonal frequency division multiplexing (OFDM) with pilot symbol assisted channel estimation is a promising technique for high rate transmissions over wireless frequency-selective fading channels. This paper analyzes the symbol error rate (SER...
[10 Apr 2008]
whitepaper Orthogonal frequency-division multiplexing (OFDM) converts a frequency-selective fading channel into parallel flat-fading subchannels, thereby simplifying channel equalization and symbol decoding. However, OFDM's performance suffers from the loss...
[10 Apr 2008]
whitepaper In this paper, a robust and efficient frame detection and symbol timing synchronization technique suitable for IEEE 802.11a wireless LAN system is proposed. The proposed method does frame detection using a threshold comparison mechanism and...
[10 Apr 2008]
whitepaper But when the channel has nulls close to or on the FFT grid, OFDM faces serious symbol recovery problems. Orthogonal Frequency Division Multiplexing (OFDM) converts a dispersive channel into parallel subchannels and thus facilitates equalization.
[10 Apr 2008]
whitepaper When the Alamouti code is applied (as a space-time block code) to an OFDM system with transmit diversity, the simple Alamouti decoding requires that each subchannel is flat-fading and constant over two symbol periods (Alamouti codeword period).
[10 Apr 2008]
whitepaper Canonical optimum and suboptimum multiple-symbol-observation OFDM-CPM receivers are derived. A class of Orthogonal Frequency Division Multiplexing - Continuous Phase Modulation (OFDM-CPM) signals is introduced in which binary data sequence is...
[10 Apr 2008]
whitepaper A new term, effective spreading code, has been introduced in this paper, which is defined as the interfering user physical code as seen by the desired user within the desired user symbol duration. In this paper, successive intracell interference...
[10 Apr 2008]
whitepaper The effects of non-ideal transmission conditions of the OFDM system including channel estimation errors, symbol timing offset, carrier and sampling clock offset, phase noise and time-selective fading are analyzed.
[10 Apr 2008]
whitepaper It is primarily used in high bit rate systems to mitigate inter-symbol interference (ISI) caused due to de- lay spread. Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier block modulation scheme suitable for wireless communications.
[03 Apr 2008]
whitepaper Using wireless mobile technology provided by Symbol Technologies, Sears enables customers to shop from their home computers and pick up their purchases at a local Sears store. Accomplished in both its retail store and online shopping channels...
[31 Mar 2008]
Comment Until a public servant is made financially responsible for lost equipment in his or her custody with an automatic penalty there will be little or no real interest in "their government status symbol". What's got silicon.com readers reaching for...
[21 Feb 2008]
whitepaper NHD's solution brings together RFID scanners from Texas Instruments, a sorting robot from Robot Technologies and a wireless, handheld computer with barcode scanner from Symbol Technologies. Northern Herd Development Co-operative Ltd (NHD) provides...
[23 Jan 2008]
whitepaper Current and future communication schemes tend to use OFDM systems in order to provide high baud rates and less inter symbol interference. Some examples are 802.11, 802.16, MC-CDMA, Digital Video Broadcasting, Wireless USB and Wireless Firewire.
[07 Jan 2008]
whitepaper The paper contributes a cross-layer analysis of the interaction between symbol modulation levels, different scheduling strategies, channel prediction errors and the resulting frame retransmissions effect on TCP.
[26 Dec 2007]
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