Abstract: A method for wireless communication includes receiving in a wireless communication terminal, which is configured to receive and transmit signals using one or more transceiver chains, an instruction from a base station to modify electrical power consumption of the wireless communication terminal. In response to the instruction, the electrical power consumption is modified by performing one or more of: (i) modifying a number of the transceiver chains that are active and (ii) modifying a clock rate in the wireless communication terminal.

Abstract: A method includes receiving a Code Division Multiple Access (CDMA) carrier carrying at least a pilot channel. Differences are computed between selected soft pilot symbols received on the pilot channel. Based on the computed differences between the selected soft pilot symbols received on the pilot channel, a level of noise is estimated for a data channel that is to be transmitted on the CDMA carrier.

Abstract: A method includes, in a mobile communication terminal, storing a mathematical model for computing a covariance matrix of data conveying signals that are received at the mobile communication terminal. At least a first data conveying signal is received in the mobile communication terminal, and one or more signal components required by the model are extracted from the first data conveying signal. A determination is made whether the model is suitable for computing the covariance matrix for the first data conveying signal based on a predefined rule. The covariance matrix is computed in the mobile communication terminal using at least one of the model and an empirical-based estimation of the covariance matrix. The covariance matrix is selected in response to the determination.

Abstract: A method includes receiving a Code-Division Multiple Access (CDMA) signal carrying at least a data channel, a pilot channel and a control channel. A first noise level is estimated on the pilot channel. A second noise level is estimated on the control channel. The first estimated noise level and the second estimated noise level are combined to produce a noise estimate of noise on the data channel.

Abstract: A method includes, in a mobile communication terminal, receiving downlink signals from at least two antennas. A signal covariance matrix for the received signals is calculated. Each diagonal element of the signal covariance matrix is enlarged by a respective antenna-specific value that depends on a respective antenna associated with the diagonal element. Equalizer coefficients are computed based on the signal covariance matrix having the enlarged diagonal elements. The received downlink signals are equalized using the equalizer coefficients.

Abstract: A method includes receiving a Code Division Multiple Access (CDMA) carrier carrying at least a pilot channel. Differences are computed between selected soft pilot symbols received on the pilot channel. Based on the computed differences between the selected soft pilot symbols received on the pilot channel, a level of noise is estimated for a data channel that is to be transmitted on the CDMA carrier.

Abstract: A wireless communication system can include at least two base stations coupled with a network, the two base stations transmitting pilot signals that are used to make a soft handoff decision for a communication device based on base station related information received from the communication device, the base station related information being assembled within the communication device by continuously tracking selected base station pilot signals received by the communication device, the selected base station pilot signals sometimes including one or more pilot signals that are not assigned to rake fingers associated with a receiver coupled with the communication device, and at least one of the base stations delivering soft handoff information to the communication device after the soft handoff decision has been made by the network.

Abstract: Methods and systems in a wireless receiver for enabling the reception of input signals at varied power levels in the presence of co-channel interference utilizing combinations of space-time adaptive processing, interference cancellation multi-user detection, and combined techniques. In multi-user detection, code, timing, and possibly channel information of multiple users are jointly used to better detect each individual user. The novel combination of adaptive signal reconstruction techniques with interference cancellation techniques provides accurate temporal cancellation of interference with minimal interference residuals.

Abstract: Methods and systems in a wireless receiver for enabling the reception of input signals at varied power levels in the presence of co-channel interference utilizing combinations of space-time adaptive processing, interference cancellation multi-user detection, and combined techniques. In multi-user detection, code, timing, and possibly channel information of multiple users are jointly used to better detect each individual user. The novel combination of adaptive signal reconstruction techniques with interference cancellation techniques provides accurate temporal cancellation of interference with minimal interference residuals.

Abstract: Methods and systems in a wireless receiver for enabling the reception of input signals at varied power levels in the presence of co-channel interference utilizing combinations of space-time adaptive processing (STAP), interference cancellation multi-user detection (MUD), and combined STAP/MUD techniques. In MUD, code, timing, and possibly channel information of multiple users are jointly used to better detect each individual user. The novel combination of adaptive signal reconstruction techniques with interference cancellation MUD techniques provides accurate temporal cancellation of interference with minimal interference residuals. Additional methods and systems extend adaptive signal reconstruction techniques to take Doppler spread into account. STAP techniques permit a wireless receiver to exploit multiple antenna elements to form beams in the direction of the desired signal and nulls in the direction of the interfering signals.

Abstract: Methods and systems in a wireless receiver for enabling the reception of input signals at varied power levels in the presence of co-channel interference utilizing combinations of space-time adaptive processing (STAP), interference cancellation multi-user detection (MUD), and combined STAP/MUD techniques. In MUD, code, timing, and possibly channel information of multiple users are jointly used to better detect each individual user. The novel combination of adaptive signal reconstruction techniques with interference cancellation MUD techniques provides accurate temporal cancellation of interference with minimal interference residuals. Additional methods and systems extend adaptive signal reconstruction techniques to take Doppler spread into account. STAP techniques permit a wireless receiver to exploit multiple antenna elements to form beams in the direction of the desired signal and nulls in the direction of the interfering signals.

Abstract: An auxiliary antenna device includes a baseband interface circuit to communicate with a wireless communications device. The wireless communications device and auxiliary antenna device exchange digital baseband data, and the auxiliary antenna device may augment or complement RF circuitry and antennas in the wireless communications device.

Abstract: Briefly, a wireless communication device having a receiver includes a pilot signal interference canceller and a linear interference suppressor is provided. The pilot signal interference canceller and the linear interference suppressor jointly operate to cancel a pilot signal interference and other interference which are part of a received signal. A method for jointly cancel the interference by the pilot signal interference canceller and the linear interference suppressor is also provided.

Abstract: Briefly, a decoder to decode a desired symbol within a plurality of multipath components. The decoder may include processing window that may be positioned around the desired symbol within a group of multipath components. A method for decoding the symbol is also provided.

Abstract: A system to decode a multirate CDMA signal. In one aspect the system includes a high rate detector to generate high rate outputs based upon decoding an input signal that includes high rate users and low rate users. The high rate outputs include actual high rate users and effective high rate users. A second stage applies a first linear transformation to the high rate outputs to generate second stage outputs. A third stage applies a second linear transformation to the second stage outputs to generate decoupled low rate user outputs and decoupled actual high rate user outputs.

Abstract: A signal processing apparatus to equalize a signal in a multipath channel, where the equalization is based upon forming a correlation vector and the inverse of a covariance matrix, where the covariance matrix is smaller in dimension than the correlation vector. In one embodiment, the signal processing apparatus forms an extended matrix from the inverse of the covariance matrix, equal in dimension to the correlation vector, by selecting one or more rows of the inverse covariance matrix and shifting the selected one or more rows to form the extended matrix. The extended matrix is multiplied by the correlation vector to provide filter weights to the equalizer. In some embodiments, filtering is performed by a sliding window correlator based upon the selected one or more rows of the covariance matrix, followed by filtering based upon the correlation vector.

Abstract: An auxiliary antenna device includes a baseband interface circuit to communicate with a wireless communications device. The wireless communications device and auxiliary antenna device exchange digital baseband data, and the auxiliary antenna device may augment or complement RF circuitry and antennas in the wireless communications device.

Abstract: Briefly, a wireless communication device having a receiver includes a pilot signal interference canceller and a linear interference suppressor is provided. The pilot signal interference canceller and the linear interference suppressor jointly operate to cancel a pilot signal interference and other interference which are part of a received signal. A method for jointly cancel the interference by the pilot signal interference canceller and the linear interference suppressor is also provided.

Abstract: A receiver includes a searcher to identify pilot signals within a received signal and a pilot tracking unit to continuously track pilot signals identified by the searcher. The pilot signals tracked by the pilot tracking unit may include pilot signals associated with an affiliated base station as well as pilot signals associated with non-affiliated base stations. In at least one embodiment, the pilot tracking unit continuously tracks most or all of the pilot signals identified by the searcher.

Abstract: A receiver includes a searcher to identify pilot signals within a received signal and a pilot tracking unit to continuously track pilot signals identified by the searcher. The pilot signals tracked by the pilot tracking unit may include pilot signals associated with an affiliated base station as well as pilot signals associated with non-affiliated base stations. In at least one embodiment, the pilot tracking unit continuously tracks most or all of the pilot signals identified by the searcher.