Andreas Falkenberg

US Patent:

6982947, Jan 3, 2006

Filed:

Apr 13, 2000

Appl. No.:

09/959258

Inventors:

Andreas Falkenberg - San Diego CA, US

Assignee:

Siemens Aktiengesellschaft - Munich

International Classification:

H04J 11/00

US Classification:

370208, 370335, 370342, 375136

Abstract:

In order to select from a plurality of codes the correct code for decoding a code division multiplex signal, in each case individual codes are combined to form combination codes which are compared with the received code division multiplex signal. Then, the individual codes of that combination code which has the greatest similarity with the code division multiplex signal are compared individually with the received code division multiplex signal, and the code most similar to the code division multiplex signal is selected for decoding.

US Patent:

7031737, Apr 18, 2006

Filed:

Oct 27, 1999

Appl. No.:

09/830623

Inventors:

Reinhold Braam - Rhede, DE
Andreas Falkenberg - San Diego CA, US
Christoph Rohe - Bochum, DE

Assignee:

Siemens Aktiengesellschaft - Munich

International Classification:

H04Q 7/20

US Classification:

455518, 455 69, 455522, 375147, 375148

Abstract:

To improve a rake receiver for telecommunication systems with wireless telecommunication between mobile and/or stationary transceivers, especially in third-generation mobile radio systems, compared with known rake receivers, such that savings with respect to the number of function blocks and logic gates used are possible, a pipeline architecture is provided in which the individual computing steps are processed as on a pipeline.

US Patent:

7106804, Sep 12, 2006

Filed:

Aug 13, 2001

Appl. No.:

09/929714

Inventors:

Andreas Falkenberg - Escondido CA, US

Assignee:

Siemens Communications, Inc. - Boca Raton FL

International Classification:

H04L 27/10

US Classification:

375283, 375330

Abstract:

A system for and method of modulating and demodulating a communication signal using differential quadrature phase shift keying (DQPSK) can include, upon receiving an inbound communication signal, demodulating the inbound communication signal by obtaining Pi/4 differential quadrature phase shift keying (DQPSK) symbols, translating the Pi/4 DQPSK symbols into quadrature phase shift keying (QPSK) symbols, and mapping the QPSK symbols to a pair of bits. Upon initiating an outbound communication signal, the system and method can include modulating the outbound communication signal by obtaining communication bits indicative of the outbound communication signal, translating the communication bits to three communication bits, and mapping the translated bits to DQPSK symbols.

US Patent:

7289779, Oct 30, 2007

Filed:

Aug 31, 2001

Appl. No.:

10/381014

Inventors:

Bernd Bienek - Bocholt, DE
Andreas Falkenberg - Escondido CA, US
Stephan Karger - Hamminkeln, DE
Theo Kreul - Coesfeld-Lette, DE
Albrecht Kunz - Saarbrücken, DE
Holger Landenberger - Bocholt, DE

Assignee:

Siemens Aktiengesellschaft - Munich

International Classification:

H03J 7/32

US Classification:

455147, 375343

Abstract:

A method is provided for calibrating the frequency of an RF oscillator in a mobile part of a mobile communications device when the mobile part is first switched on, wherein the method includes the steps of: sampling a modulated carrier that is transmitted by a base station and has a prescribed frequency accuracy, such that scanning of the modulated carrier is performed via a frequency search algorithm with the modulated carrier being demodulated, a signal thus demodulated being compared in an evaluation and synchronization program via a correlation with a sequence known in advance, and a correlation peak in an output of the correlator being determined; determining a frequency error between the frequency of the RF oscillator in the mobile part of the mobile communications device and a known channel frequency of the base station by comparing the determined correlation peak of the output of the correlator with a channel raster, known in advance to the mobile communications device, of the base station; synchronizing the mobile communications device with the modulated carrier; and adopting a frequency, corrected by the frequency error, for the RF oscillator as reference frequency for further calibration operations.

US Patent:

7826577, Nov 2, 2010

Filed:

Sep 19, 2001

Appl. No.:

10/381149

Inventors:

Bernd Bienek - Bocholt, DE
Andreas Falkenberg - Escondido CA, US
Stephan Karger - Hamminkeln, DE
Theo Kreul - Coesfeld-Lette, DE
Albrecht Kunz - Saarbrücken, DE
Holger Landenberger - Bocholt, DE

Assignee:

Palm, Inc. - Sunnyvale CA

International Classification:

H04L 7/00

US Classification:

375354, 375136, 375142, 375143, 375144, 375145, 375147, 375148, 375149, 375150, 375316, 375365, 375366, 375367, 375368

Abstract:

A method is provided for frequency acquisition, particularly for initial frequency acquisition, pursuant to a known synchronization sequence for synchronizing a mobile communications device having a local oscillator with previously known transmit frequencies of a base station that transmit in a known channel raster with defined frequency points within a band, wherein the method includes the steps of determining the inband power of the known synchronization sequence via a sensor by scanning a frequency band, performing coarse determination of the local power maximum of the inband power and, thus, of the received carrier frequency over the scanned frequency band, producing a presumed channel frequency at which the base station is transmitting on the basis of knowledge of the channel raster of the transmit frequencies of the base station, performing fine determination of the received carrier frequency by comparison with the known synchronization sequence, and correcting the frequency deviation of the local oscillator from the transmitted carrier frequency.

US Patent:

20020126707, Sep 12, 2002

Filed:

Aug 7, 2001

Appl. No.:

09/924620

Inventors:

Marcus Tong - San Marcos CA, US
Andreas Falkenberg - San Diego CA, US

International Classification:

H04J003/06

US Classification:

370/516000, 370/429000

Abstract:

A rate adjustment scheme. Two pairs of slightly oversized buffers are utilized as jitter buffers. While a pair of buffers are dispensing and gathering audio input and audio output samples, another pair of buffers function as encoder/decoder input and output buffers. The input and output sample buffers work in sample based time scale by accepting and discharging one sample at a time. The encoder/decoder buffers are utilized in frame based scale where an entire block of samples is read or written for encoding or decoding. On every frame clock derived from an external source, the uplink buffers (i.e., the audio input and the encoder input buffers) are swapped. The downlink buffers (i.e., the audio output and the decoder output buffers) are also swapped. The rate adjustment takes place seamlessly in the act of buffer swapping.

US Patent:

20020152249, Oct 17, 2002

Filed:

Oct 22, 2001

Appl. No.:

10/036246

Inventors:

Andreas Falkenberg - Escondido CA, US
Ulf Niemeyer - Bochum, DE
Christoph Rohe - Herne, DE

International Classification:

G06F007/38

US Classification:

708/290000

Abstract:

A method and apparatus determines interpolated intermediated values of a sampled signal. In order to determine interpolated intermediate values of a sampled signal, such as a digital mobile radio signal, the parameters a, b and c of the second-order polynomial y=ax+bx+c are determined starting from three known sample values (x, y), (x, y) and (x, y), so that intermediate values can be calculated using the polynomial. Here it is assumed that the signal is sampled at constant intervals, in particular at intervals normalized to d=1, and the center sample value is assigned to the sampling instant x=0, by which, a calculation can be carried out with low hardware complexity.

US Patent:

20030056115, Mar 20, 2003

Filed:

Sep 20, 2001

Appl. No.:

09/957204

Inventors:

Andreas Falkenberg - San Diego CA, US

International Classification:

G06F012/14

US Classification:

713/201000

Abstract:

The privacy of data in firmware modules of embedded systems can be obtained by a method and system that restrict access to local variables even where there are limited (or no) restrictions imposed by the program assembler. The technique used by the method and system can use a private data section, having data to be protected, and a public code section, allowing controlled access to data in the private data section. Access to functions in the public code section is allowed to external code. In contrast, data in the private data section is protected and cannot be accessed directly. The only access to such data is provided by public functions defined in a code section.

Address:

366 Somerset Hl Gln, Escondido, CA 92026

Phone:

760 625-9803

VIN:

2A4RR5DG5BR771347

Make:

CHRYSLER

Model:

TOWN AND COUNTRY

Year:

2011