Patent
Frequency offset estimation
Niklas Andgart,Fredrik Nordström +1 more
- 30 Oct 2009
34
TL;DR: In this paper, a frequency offset of a received signal comprising a number of subsequently received data symbols is estimated from a change in phase of the received signal between two received symbols having a first time distance between them.
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Abstract: A frequency offset of a received signal comprising a number of subsequently received data symbols is estimated. A first estimate is determined from a calculated change in phase of the received signal between two received symbols having a first time distance between them. At least one further estimate is determined from a calculated change in phase of the received signal between two received symbols having a different time distance. A frequency periodicity is determined for each estimate from the distance between the two received symbols from which the estimate was determined. A set of integer values is determined for each estimate so that frequency values calculated for each estimate as the frequency periodicity multiplied by the integer value added to the estimate are at least approximately equal to each other, and a corrected estimate of the frequency offset is determined from the integer values.
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Citations
Patent
Method and apparatus for estimating frequency offset, and record medium
Kang Byung Su
- 02 Apr 2019
TL;DR: In this paper, the authors present an apparatus for estimating frequency offsets by periodically transmitting a plurality of training signals from a transmitting end of a wireless local areanetwork system, which includes a receiving unit that receives the training signals, a measuring unit that measures a phase of each training signal received by the receiving unit in a predetermined measurement period, a storage unit which stores the phase, measured by the measuring unit, and an operation unit which reads the phase of the training signal pair separated by each time interval from the storage unit for a predetermined plurality of time intervals.
Patent
Apparatus and method for reducing receiver frequency errors
David Ben-Eli
- 18 Mar 2012
TL;DR: In this article, a method in a receiver includes receiving from a transmitter an instruction to check for messages from the transmitter at intervals having a specified time period, and the receiver is activated periodically according to the selected actual time period so as to reset the frequency error.
•Journal Article
Performance Analysis of Interference Alignment (IA) Scheme with the Presence of Frequency Offset
TL;DR: The Space Time Frequency Block Codes (STFBC) technique and Interference Alignment (IA) scheme is applied to achieve the diversity and as an alternative approach to mitigate the ICI respectively and it is shown that the proposed scheme is able to improve the system performance in term of Bit Error Rate (BER).
Joint Block Sparse Signal Recovery Problem and Applications in LTE Cell Search
TL;DR: The performance of the cell search algorithms proposed by using the GMMV joint block sparse signal recovery framework are numerically studied and show that they perform significantly better than the successive interference cancelation algorithm that exists in the literature.
References
Patent
Frequency offset correction for an ultrawideband communication system
Stephan ten Brink,Ravishankar H. Mahadevappa +1 more
- 03 Apr 2007
TL;DR: In this paper, a method and a receiver system for subcarrier-specific frequency offset correction including frequency offset estimation, updating and compensation is presented, which includes initial frequency offset estimate in time domain using packet preamble, frequency offset compensation during channel estimation symbols, and frequency offset update tracking during header and data part both being performed in the frequency domain.
57
Patent
Low-complexity and fast frequency offset estimation for OFDM signals
Zhongjun Wang
- 11 Apr 2003
TL;DR: In this article, the correlation between the two short symbols is determined by dividing the numerical interval of the phase angle of the correlation among the samples of the short symbol into certain equal portions from which their middle values are respectively chosen.
16
Patent
Residual frequency offset exploitation
Engdahl Karin
- 14 Jun 2007
TL;DR: In this article, the residual frequency offsets of de-spread correlated signals derived from a received communication signal are determined and used to improve receiver performance in high-velocity situations, which can be used for adaptive AFC combining, improved velocity estimation and adaptive residual frequency offset compensation.
11
Patent
Frequency error estimation algorithm
Jukka Mikkonen
- 22 Apr 2008
TL;DR: In this article, a frequency error estimation algorithm for radio receivers is presented for use in radio receivers, which utilizes irregular time intervals between pilot symbols to improve the frequency range of the estimate.
11
Patent
Receiver with AFC function for operating in soft handover
Mickael Bouyaud
- 02 May 2007
TL;DR: In this paper, a receiver (20) with Automatic Frequency Control (AFC) is described, which is able to provide compensation command defined as a function of a combination of at least two analytical terms, each term depending on the estimated offset frequency of the corresponding input signal.
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