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Successive Blind Detection of DS/CDMA Signals
White Papers This paper provides an investigation into the performance of a multi-stages constant modulus filter/ signal canceller (CMA/SC) for blind detection of direct sequence/code code division multiple-access (DS/CDMA) signals over additive white Gaussian...
[August 1, 2004, 3:00]
Optimal Training Signals for SISO OFDM Channel Estimation in the Absence/Presence of Frequency Offsets
White Papers This paper addresses the problem of designing optimal training signals for SISO OFDM channel estimation in the presence of frequency offsets. First, the paper presents optimal training signals for OFDM channel estimation in the absence of frequency...
[April 11, 2007, 1:01]
Government to boost power of digital TV signals
News In a consultative document published on Friday, e-commerce minister Douglas Alexander and Kim Howells, broadcasting minister, made a commitment to improve the reliability and coverage of Digital TV signals in the UK, in preparation for the switch...
[October 15, 2001, 17:49]
Blind Detection of CDMA Signals Based on Kalman Filter
White Papers This paper studies detection of CDMA signals based on Kalman filter. By defining combination of channel and transmitted signals as state variables, the state transition matrix and measurement matrix are derived without approximations.
[November 8, 2006, 0:00]
Iterative Estimation and Cancellation of Clipping Noise for OFDM Signals
White Papers Clipping is an efficient and simple method to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. The proposed method is applied to clipped and filtered OFDM signals.
[October 21, 2004, 3:00]
On the Behaviour of Non-Linearly Distorted OFDM Signals
White Papers This paper presents novel and unintuitive results related to the behaviour of non-linearly distorted OFDM signals. Particularly this paper shows that the error probability performance of such signals can in fact decrease as the number of OFDM sub...
[October 21, 2004, 3:00]
Spectral Analysis of OFDM Signals and Its Improvement by Polynomial Cancellation Coding
White Papers It is shown that the spectral rolloff of OFDM signals can be improved by PCC and the resultant OOB power is much reduced. In orthogonal frequency division multiplexing (OFDM) systems, the subcarriers are generated by an inverse discrete Fourier...
[October 21, 2004, 3:00]
PAPR Performance of IDFT-Based Uncoded OFDM Signals With Null Subcarriers and Transmit Filtering
White Papers In this paper, the Peak-to-Average Power Ratio (PAPR) is evaluated for the uncoded Orthogonal Frequency Division Multiplexing (OFDM) signals generated by using the IDFT procedure. Numerical results confirm that the proposed analysis accurately...
[April 11, 2007, 1:01]
On the Use of Pilot Signals in OFDM Based WLANs
White Papers Pilot signals are used in the OFDM (orthogonal frequency-division multiplexing) based WLAN (wireless local area network) standard adopted by the IEEE 802.11 standardization group in July 1998. This paper presents a simple method of effectively...
[November 2, 2004, 2:00]
An ADS Bench for Generating Multi-Carrier 3GPP WCDMA ACLR Test Signals
White Papers Multi-carrier Wideband CDMA signals are required for testing 3G wireless base stations. This paper shows how to create a source able to generate those signals, using the Agilent Technologies Advanced Design System 2001 (ADS 2001) environment.
[March 22, 2005, 2:00]
Virgin Trains boosts on-board mobile signals
News Virgin's cross-country trains are being fitted with equipment which will boost mobile signals. But now the train company is fitting all its London-to-north-Wales and cross-country trains with GSM repeaters, which will amplify mobile signals within...
[May 15, 2007, 15:17]
Detection of OFDM-CPM Signals Over Multipath Channels
White Papers A class of Orthogonal Frequency Division Multiplexing - Continuous Phase Modulation (OFDM-CPM) signals is introduced in which binary data sequence is mapped to complex symbols using the concept of correlated phase states of a CPM signal.
[October 21, 2004, 3:00]
Troubleshooting Digitally Modulated Signals With a QAM Analyzer
White Papers This paper gives an overview of the features available in many QAM analyzers, and more importantly, how to use those features to troubleshoot problems with digitally modulated signals. Quadrature Amplitude Modulation (QAM) is a modulation scheme...
[June 13, 2008, 1:01]
An Iterative Method to Restore the Performance of Clipped and Filtered OFDM Signals
White Papers Clipping is an efficient and simple method to reduce the peak-to-average power ratio (PAPR) of OFDM signals. The proposed method is applied to clipped and filtered OFDM signals. However, clipping causes distortion and out-of-band radiation.
[November 2, 2004, 2:00]
Optimal Training Signals for MIMO OFDM Channel Estimation
White Papers This paper presents general classes of optimal training signals for the estimation of frequency-selective channels in MIMO OFDM systems. Basic properties of the discrete Fourier transform are used to derive the optimal training signals which...
[August 11, 2008, 1:22]
Veescope Signals
Downloads Veescope Signals revolutionizes color correcting in Final Cut Pro. Whatever video you need to color correct, Veescope Signals can help make it look it's best. It's innovative video scopes allow you to make color adjusts easier and more...
[October 30, 2008, 17:01]
Cannot handle Macrovision signals from DVD players
Member Review It can't handle Macrovision signals. Good image -- but not if you connect it to a DVD player! Background below. I wanted an XGA native resolution projector, that was 32DB or less, and would not cost much more than £1,500.
[March 15, 2004, 10:12]
Transmission of IEEE802.16d WiMAX Signals Over Radio-Over-Fibre IMDD Links
White Papers Finally, experiments demonstrating the feasibility of RoF technology to deliver WIMAX signals based in the IEEE 802.16d-2004 specification in the 3.5 GHz band are reported. In this paper, an overview of RoF technology is provided, followed by the...
[April 23, 2009, 1:24]
Distortion of W-CDMA Signals Over Optical Fibre Links
White Papers This paper presents first measurement results for the transmission of W-CDMA signals over optical fibre. Radio over fibre systems are now being used extensively for enhanced cellular coverage inside buildings such as office blocks, shopping malls...
[October 18, 2005, 3:00]
Study and Implementation of Complementary Golay Sequences for PAR Reduction in OFDM Signals
White Papers In this paper some results of PAR reduction in OFDM signals and error correction capabilities by using Complementary Golay Sequences are presented. These results have been obtained by simulations and later this technique has been implemented in a DSP.
[March 24, 2005, 2:00]
