| Patent Number |
Title Of Patent |
Date Issued |
| 7583760 |
Calculation of soft decision values using reliability information of the amplitude |
September 1, 2009 |
| Method of, and arrangement and device for, decoding a communications signal in a digital communications system, where the communications signal is modulated according to a modulation scheme including amplitude information; generating a likelihood value for a received communications s |
| 7561637 |
Determination of a channel estimate of a transmission channel |
July 14, 2009 |
| A method of determining a channel estimate of a first transmission channel in a communications system. The method comprises deriving a first set of channel estimates from symbols received through said first transmission channel; deriving a second set of channel estimates from symbols rec |
| 7555074 |
Interference estimation in the presence of frequency errors |
June 30, 2009 |
| Methods and apparatus for estimating interference level in a receiver are dominated by the receiver's residual frequency error when the interference is low. The interference estimation method can be changed when the interference is low such that it compensates for the effects of resi |
| 7551597 |
Methods and apparatus for fast downlink information of uplink out-of-synchronization |
June 23, 2009 |
| Information systems, detectors, and methods for a communication link, such as the downlink of a cellular telephone system, reduce the problem of uplink transmit power peaks when the uplink is out of synchronization (OoS). One method of indicating that a first link to a communication node |
| 7546136 |
Variable transmit power control strategies for high-speed downlink packet access systems |
June 9, 2009 |
| In communication systems that send transmit power control (TPC) commands in one direction so that only enough transmit power is used to maintain sufficient quality in the opposite direction, the TPC commands can be used to obtain information about the quality of the opposite-direction |
| 7463599 |
Method and apparatus for minimizing time of reception during paging |
December 9, 2008 |
| A method and apparatus for detecting a periodic message in a mobile communication system includes initiating, at a receiver, a reception of synchronization data a predetermined amount of time prior to a current periodic message. The predetermined amount of time is based on at least o |
| 7437175 |
Synchronization detection methods and apparatus |
October 14, 2008 |
| Methods and apparatus for determining when uplink synchronization has been achieved when entering or adding a link in soft handover to a new node in a communication system. Transmit power control (TPC) commands from the new link are not included in a TPC command combination until an upli |
| 7389112 |
Mobile terminal for optimal spectrum utilization in cellular systems |
June 17, 2008 |
| A method and apparatus for providing handover between carriers of different duplex frequency separation distances is provided. A mobile terminal is configured to operate in both fixed and variable duplex. The ability operate with unpaired up-link and down-link frequency carrier pairs |
| 7319868 |
Derivation of optimal antenna weights during soft handover |
January 15, 2008 |
| Wireless communication method and system for improving optimal antenna weight derivation in transmit diversity mode during soft handover. The method and system use scale factors that depend on the reliability of the feedback information (FBI) detection on the uplink. Depending on FBI |
| 7206583 |
Co-channel interference suppression by estimating the time of arrival (TOA) |
April 17, 2007 |
| The invention provides improved suppression of co-channel interference (CCI) in a wireless cellular communications system where at least two base stations use the same transmit frequency. The method according to the invention uses the difference in synchronization times between the h |
| 7184791 |
Methods, receivers, and computer program products for determining transmission power control com |
February 27, 2007 |
| Methods, receivers, and computer program products for defining asymmetric decision regions of a symbol space to interpret transmitted power control commands are disclosed. A method of determining transmitted power control commands at a receiver can include defining a first decision regio |
| 7154966 |
Method and system for M-QAM detection in communication systems |
December 26, 2006 |
| A method and system are described for performing fast and simple M-QAM detection on received signals, such as a 16-QAM signal, by estimating M-QAM symbol constellation decision boundaries. Amplitude information is collected for in-phase and quadrature phase components of the received |
| 7149538 |
Wireless transceivers, methods, and computer program products for restricting transmission power |
December 12, 2006 |
| A method for controlling transmission power from a wireless transceiver. Signal to interference ratios (SIRs) are estimated for a signal that is received from another wireless device. An out-of-sync condition between the wireless transceiver and the other wireless device is identified |
| 7110376 |
Method and apparatus for improved cell detection |
September 19, 2006 |
| A method and apparatus for improved cell detection in a cellular communication system correlates a received signal with both a primary synchronization signal and a secondary synchronization signal. The results from the primary and secondary synchronization detection are used to deter |
| 7046720 |
System and method for DC offset compensation in a WCDMA receiver |
May 16, 2006 |
| A system and method for DC offset compensation wherein a received first signal is despread using a first spreading code to generate a second signal. The second signal along with a first set of pilot symbols is used to estimate a radio channel. The first signal is also despread using a |
| 7020070 |
Selectively controlled modulation distortion of an IQ-baseband signal |
March 28, 2006 |
| The frequency bandwidth of a signal is reduced, while retaining the desired signal information, by selectively introducing a controlled distortion to an IQ baseband signal. Selective generation of either a non-distorted complex-valued baseband signal or a distorted complex-valued bas |
| 7013140 |
Mobile terminals and methods for performing fast initial frequency scans and cell searches |
March 14, 2006 |
| A mobile terminal can identify cellular control channels that can be received by the mobile terminal from a cellular system, by identifying a cellular control channel that can be received from a history list of cellular control channels that were previously received by the mobile ter |
| 6954489 |
Determining correlations of received sequences to multiple known sequences in a communications s |
October 11, 2005 |
| A method, system, and apparatus enables interfering signals in a communications system to be efficiently identified using correlation calculations. Once identified, the interfering signals may be rejected and removed from further processing in a receiver. The number of mathematical o |
| 6725024 |
Offset local oscillator frequency |
April 20, 2004 |
| A method and apparatus for offsetting the frequency of a local oscillator in a receiver are disclosed. The local oscillator frequency is offset with an offset frequency that depends on the training sequence used. Training symbols are inputted to the control unit. The control unit then pr |
