# Dietmar Lipka, Berg DE

## Dietmar Lipka, Berg DE

Patent application number | Description | Published |
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20100195479 | TECHNIQUE FOR GENERATING AN SC-FDMA SIGNAL - A technique for generating a Single-Carrier Frequency Division Multiple Access (SC-FDMA) signal based on a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence is disclosed. A method embodiment of this technique comprises generating a frequency domain representation of the CAZAC sequence by providing an analytical representation of the CAZAC sequence in the frequency domain with an integer phase term and calculating the integer phase term in a recursive manner for each of a plurality of frequency domain samples of the CAZAC sequence. The resulting frequency domain representation of the CAZAC sequence is then mapped to a predetermined frequency location before being transformed into the time domain to obtain a time domain representation of the SC-FDMA signal. The SC-FDMA signal may be a random access signal for transmission on a Physical Random Access Channel (PRACH). | 08-05-2010 |

20100329229 | SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS TECHNIQUE - A technique for generating a single carrier frequency division multiple access (SC-FDMA) signal is described, in which from a set of M input symbols a set of N output symbols (M | 12-30-2010 |

20100331032 | TECHNIQUE FOR PERFORMING A RANDOM ACCESS PROCEDURE IN A MOBILE DEVICE - A technique for performing a random access procedure in a fast moving mobile device in context with accessing a radio base station is described. A method embodiment of the technique comprises tuning a receiver of the mobile device to an expected frequency of a pilot signal provided by the base station; determining, based on an output signal of the receiver, a feedback signal for locking the receiver to a receive frequency of the pilot signal; providing the feedback signal to a transmitter of the mobile device; and adjusting a transmission frequency of a random access signal according to a frequency offset between the expected frequency and the receive frequency of the pilot signal indicated by the feedback signal. | 12-30-2010 |

20110014889 | BASEBAND SIGNAL PROCESSING TECHNIQUE - A baseband processing technique is described that permits to process in an analog signal domain a complex-valued baseband signal to laterally remove interference components resulting, for example, from in-band blocking signals. In an exemplary device implementation, the baseband processing device is configured to receive a baseband signal having a designated signal bandwidth defined by two opposite band edges, wherein a first frequency shift in a first direction toward a first band edge is impressed on the baseband signal. The device comprises a first filter stage adapted to filter the baseband signal exhibiting the first frequency shift to remove interference components behind the first band edge, a frequency shifter stage adapted to shift the filtered baseband signal by a second frequency shift in a second direction opposite the first direction towards a second band edge, and a second filter stage adapted to filter the baseband signal exhibiting the second frequency shift to remove interference components behind the second band edge. | 01-20-2011 |

20110026649 | Technique for determining a frequency offset - A technique for determining a frequency offset between components of a communication network based on a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence is described. A method implementation of this technique comprises a provision of a set of correlation signals at different frequencies, with each correlation signal being indicative of a specific frequency offset hypothesis and comprising the CAZAC sequence. Once a synchronization signal comprising the CAZAC sequence is received, this synchronization signal is correlated with each of the correlation signals to obtain a correlation result for each frequency offset hypothesis. In a next step, at least one of the frequency offset hypotheses is selected based on a comparison of the correlation results. The frequency offset may then be determined based on the at least one selected frequency offset hypothesis. | 02-03-2011 |

20110064069 | Technique for SC-FDMA signal generation - A technique for generating a Single-Carrier Frequency Division Multiple Access, or SC-FDMA, signal having a transmission bandwidth and comprising a Constant Amplitude Zero-Autocorrelation, or CAZAC, sequence of length N | 03-17-2011 |

20110103405 | Technique for adjusting a phase relationship among modulation symbols - A technique for adjusting a phase relationship among modulation symbols is disclosed. A method embodiment of this technique comprises the steps of applying to a sequence of modulation symbols a phase ramp that continuously increases over the duration of the symbol sequence, and applying a compensation phase to each modulation symbol to introduce a phase offset between two subsequent modulation symbols. The joint application of the phase ramp and the compensation phase can be used to establish a saw tooth-like phase characteristic over the sequence of modulation symbols. In one embodiment, the phase ramp is applied in the context of impressing a frequency shift on the modulation symbols. | 05-05-2011 |

20110116383 | Technique for Peak Power Reduction - A peak power reduction technique for a transmitter stage configured to map a set of input symbols onto a set of orthogonal subcarriers to generate a modulated signal is proposed. The technique can be adaptively implemented responsive to a dynamically changing subcarrier allocation. In a method realization, the technique comprises the steps of receiving the modulated signal in a time domain representation, evaluating a power distribution of the modulated signal in the time domain to detect one or more power peaks, and processing the one or more peaks detected in the modulated signal taking into account the dynamically changing subcarrier mapping. | 05-19-2011 |

20110134980 | Technique for Controlling a Gain of a Receiver - A technique for controlling a gain of a receiver is provided. A method implementation of this technique comprises the steps of receiving at least one signal, initially controlling the gain of the receiver based on a correlation value of a first part of the received signal having a substantially constant signal strength, determining at least one timing-related parameter of the received signal based on the at least first part, identifying based on the at least one timing-related parameter at least a second part of the received signal having a substantially constant signal strength and further controlling the gain of the receiver based on a measured signal strength of the identified second part. | 06-09-2011 |

20110176535 | Technique for Synchronizing a Terminal Device with a Wireless Network - The invention relates to a technique for controlling a synchronization of a terminal device ( | 07-21-2011 |

20130143556 | Technique for Cell Signature Determination - A technique for cell signature determination in a cellular communication network is provided. A method implementation of this technique comprises the steps of providing a set of hypothesis signals, each hypothesis signal including a signature hypothesis, receiving a composite signal including a first signal portion carrying a first signature from a first cell and a second signal portion carrying a second signature from a second cell, wherein the first signal portion and the second signal portion overlap at least partially in time, and obtaining a correlation result by correlating the composite signal with each hypothesis signal. After the first signature has been determined, a set of phantom signatures associated with the first signature is provided. The phantom signatures represent artifacts from the first signal portion in the correlation result. Finally, the second signature is determined based on the correlation result taking into account the set of phantom signatures associated with the first signature. | 06-06-2013 |

20130230012 | DETERMINING A MOBILE COMMUNICATIONS NETWORK CELL FREQUENCY - The invention refers to supporting a cell search within a cellular communications network by evaluating a radio signal received from the network, the radio signal covering a certain frequency range composed of a plurality of frequency bands, wherein each band is associated to a certain carrier frequency, the method comprising generating ( | 09-05-2013 |

20130237217 | Technique For Cell Signature Determination - A technique for cell signature determination in a cellular communication network is described. A method implementation of this technique comprises the steps of providing a set of cell signature hypotheses (d(n)), each cell signature hypothesis including a first partial hypothesis (d(2n)) and a second partial hypothesis (d(2n+1)), receiving a signal (X(n)) carrying a cell signature, the signal (X(n)) including a first partial signal (X(2n)) and a second partial signal (X(2n+1)), correlating the first partial signal (X(2n)) with each first partial hypothesis (d(2n)) to determine a first correlation result for each cell signature hypothesis, correlating the second partial signal (X(2n+1)) with each second partial hypothesis (d(2n+1)) to determine a second correlation result for each cell signature hypothesis, and determining the cell signature based on the correlation results including discarding a given cell signature hypothesis based on an analysis of a first magnitude of the first correlation result associated with the given cell signature hypothesis and a second magnitude of the second correlation result associated with the given cell signature hypothesis. | 09-12-2013 |