A radio frequency (RF) rake receiver may include a plurality of diversity receive paths, with each diversity receive path including a respective rake receiver despreader, and a tracking loop. The tracking loop may be configured to generate a composite timing signal based upon the rake receiver despreaders, and provide the composite timing signal to the diversity receive paths.

This invention teaches to the details of an interference suppressing receiver for suppressing intra-cell and inter-cell interference in coded, multiple-access, spread spectrum transmissions that propagate through frequency selective communication channels to a multiplicity of receive antennas. The receiver is designed or adapted through the repeated use of symbol-estimate weighting, subtractive suppression with a stabilizing step-size, and mixed-decision symbol estimates. Receiver embodiments may be designed, adapted, and implemented explicitly in software or programmed hardware, or implicitly in standard RAKE-based hardware either within the RAKE (i.e., at the finger level) or outside the RAKE (i.e., at the user or subchannel symbol level). Embodiments may be employed in user equipment on the forward link or in a base station on the reverse link. It may be adapted to general signal processing applications where a signal is to be extracted from interference.

The disclosure discloses a path detection method including after obtaining an equalizing signal of a received signal, Maximum Likelihood (ML) path detection and ML complementary set path detection are performed on the equalizing signal according to the pre-set maximum number of reserved nodes and maximum number of expanded branches of each layer; in the process of the detections, an accumulated path measurement value is calculated after finishing the search of each layer and each path, and the accumulated path measurement value is compared with a pre-set search measurement threshold; when the accumulated path measurement value is less than the search measurement threshold, the search of this path is continued; otherwise the search of this path is finished and the search of the next path is started until all the paths are searched. The disclosure also discloses a path detection device, Sphere Decoding (SD) detection device and computer storage medium.

The disclosure relates to a radio receiver, comprising: a receiving stage configured to receive a multi-layered signal comprising a plurality of layers; a division stage configured to divide the plurality of layers into a first subset and a second subset (206); a first whitening filter configured to filter the multi-layered signal based on a noise and interference covariance measure derived from the second subset to provide a first filtered multi-layered signal; and a first detection stage configured to detect at least one layer of the first subset based on the first filtered multi-layered signal.

A wireless receiver wireless receiver unit (200) having a plurality of antennas comprises a spatial phase corrector circuit (234) connected to a first and second receiver (220, 222) and comprises: a computation circuit (330) configured to generate a spatial-covariance matrix, SCM, of a received first and second AM signal; a signal decomposition circuit (334) configured to generate an Eigen-value decomposition, EVD, (336) of the SCM; and a processor (340) configured to analyse the EVD of the SCM of the received first and second AM signal and select and output a principal Eigen-vector that is representative of at least a first weight (350) and a second weight (352). A combiner (240) is configured to apply the first weight (350) to the first AM signal received and apply the second weight (352) to the second AM signal received and coherently combine and output (250) the received weight-applied first and second AM signal.

Method for propagation channel estimation in an NM Multiple-Input-Multiple-Output (MIMO) communication system comprising a transmitter (202) comprising N transmit antennas and a receiver (204) comprising M receive antennas and a MIMO equalizer (206) comprising multiple taps, where N>1 and M>1. The method includes producing (s402) a single tap equalizer (Q) based on a multi-tap equalizer (Q). The method also includes producing (s404) an inverse effective-channel estimate (Q.sub.e) based on Q, The method also includes inverting (s406) Q.sub.e to produce an effective-channel estimate (H.sub.e), The method also includes producing (s408) H.sub.a based on H.sub.ewherein H.sub.a can be used to determine one or more performance metrics.

A method of processing a reception signal and a MIMO receiver are disclosed. The method includes the steps of selecting a reference RE from an RE group including a plurality of REs, generating a preprocessing filter to be shared by the plurality of the REs belonging to the RE group based on channel information of the reference RE and generating detection signals for the plurality of the REs in a manner of compensating reception signals for each of the plurality of the REs using the preprocessing filter and channel information of each of the plurality of the REs.

.[.An equal gain composite beamforming technique which includes the constraint that the power of the signal output by each antenna is the same, and is equal to the total power of the transmit signal divided by the number N of transmit antennas from which the signal is to be transmitted. By reducing output power requirements for each power amplifier, the silicon area of the power amplifiers are reduced by as much as N times (where N is equal to the number of transmit antennas) relative to a non-equal gain composite beamforming technique..]. .Iadd.A method and apparatus are disclosed for a multiple input multiple output (MIMO) transmission technique by a wireless communications device which includes providing that the power applied to each transmit antenna may be equal to the total power of the transmit signal divided by the number N of transmit antennas from which the signal is to be transmitted. The device may produce a weight for each of the N transmit antennas used in MIMO transmission. Also, the device may determine a total transmit power and produce a multi-carrier signal for transmission. The device may weight the multi-carrier signal for each antenna per the produced weight. Further, the device may apply a power to each of the N transmit antennas, for the weighted multicarrier signal, which is equal to the total transmit power divided by N. Each transmit antenna signal may be amplified by an amplifier coupled to that antenna..Iaddend.

The disclosure discloses a path detection method including after obtaining an equalizing signal of a received signal, Maximum Likelihood (ML) path detection and ML complementary set path detection are performed on the equalizing signal according to the pre-set maximum number of reserved nodes and maximum number of expanded branches of each layer; in the process of the detections, an accumulated path measurement value is calculated after finishing the search of each layer and each path, and the accumulated path measurement value is compared with a pre-set search measurement threshold; when the accumulated path measurement value is less than the search measurement threshold, the search of this path is continued; otherwise the search of this path is finished and the search of the next path is started until all the paths are searched. The disclosure also discloses a path detection device, Sphere Decoding (SD) detection device and computer storage medium.

A method of processing a reception signal and a MIMO receiver are disclosed. The method includes the steps of selecting a reference RE from an RE group including a plurality of REs, generating a preprocessing filter to be shared by the plurality of the REs belonging to the RE group based on channel information of the reference RE and generating detection signals for the plurality of the REs in a manner of compensating reception signals for each of the plurality of the REs using the preprocessing filter and channel information of each of the plurality of the REs.