1
William W Jones, Ragnar H Jonsson, Sverrir Olafsson: Method and apparatus for line probe signal processing. Mindspeed Technologies, Weide & Miller, December 7, 2004: US06829293 (69 worldwide citation)

A system, method, and signal are disclosed for line probing. The invention provides an improved signal for line probing having desirable characteristics. In various embodiments the signal comprises a periodic sequence having good autocorrelation characteristics. The periodic sequence of the inventio ...


2
Sverrir Olafsson: Unified trellis encoder. Rockwell International Corporation, William C Cray, Philip K Yu, June 16, 1998: US05768309 (59 worldwide citation)

A method of digital data transmission between a first transceiver and a second transceiver is disclosed. The first transceiver has a first transmitter and a first receiver and the second transceiver has a second transmitter and a second receiver. The first transmitter also contains a programmable en ...


3
William W Jones, Shrenik Patravali, Ragnar H Jonsson, Sverrir Olafsson: Line probe signal and method of use. Mindspeed Technologies, Weide & Miller, February 17, 2004: US06693992 (41 worldwide citation)

A system, method, and signal are disclosed for line probing. The invention provides an improved signal for line probing having desirable characteristics. In various embodiments the signal comprises a periodic sequence having good autocorrelation characteristics. The periodic sequence of the inventio ...


4
Sverrir Olafsson: Methods and apparatus for verifying transmit power levels in a signal point limited transmission system. Conexant Systems, Snell & Wilmer, December 19, 2000: US06163570 (38 worldwide citation)

A pulse code modulation modem system utilizes the same total average transmit power formula for designing signal point constellations and for verifying that the transmit power of the signal point constellations are within a designated maximum power limit. The transmit power of the signal point const ...


5
Sverrir Olafsson: Fast resynchronization system for high-speed data transmission. Rockwell Int l, James P O Shaughnessy, Susie H Oh, February 9, 1999: US05870438 (33 worldwide citation)

A system for resynchronizing the timing and carrier phases of a modem receiver signal to enable the receiver to quickly reacquire the timing phase and the carrier phase, and thereby restart the demodulation process. The system provides accurate estimates of the timing and carrier phases, as well as ...


6
Elias Bjarnason, Olafur Jonsson, Sverrir Olafsson: Method and apparatus for training linear equalizers in a PCM modem. Conexant Systems, Snell & Wilmer L, September 7, 1999: US05949819 (32 worldwide citation)

A pulse code modulation (PCM) modem system employs a relatively white training signal to optimize the adaptive filter coefficients in the receiver equalizers. During the training mode, any line coding or equivalent spectral shaping is disabled to provide a training signal sequence having a substanti ...


7
Sverrir Olafsson: Adaptive timing recovery with gain adjustment. Rockwell International Corporation, George A Montanye, David J Arthur, Philip K Yu, September 26, 1995: US05454015 (29 worldwide citation)

An adaptive timing recovery method and apparatus are disclosed. The present invention reduces the problems in connection with the conventional timing recovery by varying the gain of the band-edge filtering in inverse proportion to the available band-edge energy in the received signal. The non-linear ...


8
Olafur O Jonsson, Sverrir Olafsson, Sandeep Rajpal, Ramin A Nobakht: 4 x 4 dimensional block modulation code for a PAM-5 constellation. Conexant Systems, Akin Gump Strauss Hauer & Feld, May 23, 2000: US06067326 (27 worldwide citation)

A method is disclosed for encoding and modulating bits of an information stream and transmitting them over a designated channel in a high speed communication system. The method includes the steps of dividing a set of the entire constellation of available points into a finite plurality of zero parity ...


9
Ragnar Jonsson, Sverrir Olafsson, Elias Bjarnason: Timing recovery for a high speed digital data communication system based on adaptive equalizer impulse response characteristics. Conexant Systems, Farjami & Farjami, July 2, 2002: US06414990 (27 worldwide citation)

A preferred timing recovery scheme is particularly suitable for a high speed digital data communication system that employs T-spaced equalization in the receiving device, where echo cancellation occurs after equalization. The timing recovery technique is based upon an analysis of the impulse respons ...


10
Sverrir Olafsson, Sandeep Rajpal: Control channel for modems. Conexant Systems, Philip K Yu, Mark M Takahashi, June 8, 1999: US05910959 (26 worldwide citation)

A methodology for a modem control channel is disclosed. The channel allows faster seamless rate change and precoder tap exchange than the baseline procedure for seamless rate change, allowing for more robust transmission of control information. It can also be use to convey side-information in the ca ...