# Ahmet Bastug

## Ahmet Bastug, Cekmekoy/istanbul TR

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20090034602 | FILTER WEIGHT ESTIMATION DEVICE WITH UPDATE AT HSDSCH SYMBOL RATE, FOR A SYMBOL LEVEL EQUALISER - A filter weight estimation device (D), for an equaliser of a communication receiver, comprises i) a tap delay line connected to N branches each comprising a descrambler (DS | 02-05-2009 |

20100284493 | DOWN-SAMPLED IMPULSE RESPONSE CHANNEL ESTIMATION - A method for deriving a channel transfer function from an Orthogonal Frequency-Division Multiplex (OFDM) signal received over a channel and having unmodulated sub-carriers and sub-carriers modulated with symbols, includes the steps of sampling the received OFDM signal at a sampling rate greater than the bandwidth of the OFDM signal, deriving from the sampled OFDM signal a set of time domain coefficients representative of the channel impulse response, and deriving from a subset of the set of time domain coefficients a channel transfer function in the frequency domain. | 11-11-2010 |

## Ahmet Bastug, Surrey FR

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20100027589 | METHOD AND APPARATUS FOR ESTIMATING NOISE VARIENCE - The invention is directed towards a method and apparatus for estimating a noise variance in a receiver of a code multiplex telecommunications system with orthogonal spreading codes, wherein respective real and imaginary parts of a sum and a difference of two estimated symbols having substantially same amplitudes are determined, and then respective minimum energy components of the determined real and imaginary parts of the sum and difference are determined. The respective minimum energy components are finally combined to obtain the noise variance. Thereby, noise variance can be estimated simply based on addition and comparison operations, which reduces complexity and processing load. | 02-04-2010 |

## Ahmet Bastug, Istonbul TR

Patent application number | Description | Published |
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20090323874 | CHANNEL ESTIMATION USING COMMON AND DEDICATED PILOTS - The present invention relates to a receiver apparatus and method of channel estimation in a telecommunication system which provides at least two pilot sequences, and to a computer program product. Channel estimation is achieved by estimating channel taps separately for each of the at least two pilot sequences in every transmission block, and for applying estimated channel taps obtained from the estimation to at least one of a temporal and spatial filtering or combining operation to refine the channel estimate. Accordingly, temporal correlations and cross-correlations of the at least two pilot sequences are exploited without requiring knowledge of path delays and beamforming parameters. | 12-31-2009 |

## Ahmet Bastug, Geneva CH

Patent application number | Description | Published |
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20090296679 | SYMBOL-LEVEL ADAPTATION METHOD, MEMORY, EQUALIZER AND RECEIVER FOR IMPLEMENTING THIS METHOD - A symbol-level adaptation method to adapt at least one coefficient of an equalizer, wherein the method includes a) determining if there exists a shortened pilot channelization code which has a spreading factor shorter than the spreading factor of a full pilot channelization code and which is, at the same time, still orthogonal to any other simultaneously active channelization codes, and, b) if there exists a shortened pilot channelization code, despreading the pilot channel using the shortened pilot channelization code to obtain a pilot symbol estimation, and c) adapting the value of the equalizer coefficient according to the error between the pilot symbol estimation obtained from step b) and a corresponding expected pilot symbol. | 12-03-2009 |

## Ahmet Bastug, Sophia-Antipolis-Valbonne FR

Patent application number | Description | Published |
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20090274198 | DETERMINATION OF ACTIVE SPREADING CODES AND THEIR POWERS - The present invention relates to a method and a device for detecting active spreading codes for a signal in a communication system and estimating power of the active spreading codes. Further, the present invention ensures efficient interference cancellation. Multiple correlations are performed at a single level of a spreading code tree, the produced output samples are then observed at this level during a defined period, and a decision for the activity and power is met for all existing codes via extracting and processing information from these samples. At the correlation step, unitary fast Walsh Hadamard transformation is performed at practically the highest spreading factor in the system. | 11-05-2009 |

## Ahmet Bastug, Istanbul TR

Patent application number | Description | Published |
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20090028124 | Symbol-Level Adaptation Method for Equalizer Coefficients, Memory, Equalizer and Receiver for Implementing the Method - A symbol-level adaptation method to adapt at least one coefficient of an equalizer, wherein the method comprises the steps of: | 01-29-2009 |