A wireless communication system non-collaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine a weight vector w.sub.i for each subscriber station using the determined combining vector of the subscriber station. The i.sup.th combining vector corresponds to a right singular vector corresponding to a maximum singular value of a channel matrix between a base station and the i.sup.th subscriber station. Each subscriber station transmits signals using a weight vector v.sub.i, which corresponds to a left singular vector corresponding to a maximum singular value of a channel matrix between the i.sup.th subscriber station and the base station. The base station uses the weight vector w.sub.i to determine the signal transmitted by the i.sup.th subscriber station.

A signal processing method and a related device are provided. The signal processing method includes: determining that there are N directions for received signals corresponding to a same signal source; configuring beam directions of an antenna as the N directions; estimating delays of the N received signals received by using the antenna, and separately performing, by using the estimated delays of the N received signals, delay compensation on the N received signals to obtain N received signals obtained after delay compensation, where the N received signals are in a one-to-one correspondence with the N directions, and N is an integer greater than 1; and performing combining processing on the N received signals obtained after delay compensation. The technical solutions in embodiments of the present invention help increase a signal reception gain in a multipath scenario.

Certain aspects of the present disclosure provide techniques for using beam sets for mobility management. A BS serving the UE may transmit, to the UE, information regarding one or more beam sets, wherein each of the beam sets comprise one or more reference beams used to transmit a reference signal. The BS may transmit, to the UE, one or more mobility parameters, wherein the mobility parameters are associated with the reference beams and one or more mobility event triggers. The BS may receive, from the UE, an indication of a detected mobility event, the mobility event is detected based, at least in part, on the mobility parameters. The BS may take one or more actions based, at least in part, on the indication. A UE may perform corresponding steps as described herein.

An information handling system includes a processor, a memory, and a wireless interface adapter for transceiving wireless communications via radiofrequency (RF) waves, a plurality of antennas operatively coupled to the wireless interface adapter, including a first antenna operatively coupled to a first wireless protocol subsystem, a second antenna operatively coupled to a second wireless protocol subsystem, and a shared antenna, an RF switch configured to operatively switch the shared antenna between the first wireless protocol subsystem and the second wireless protocol subsystem, and an antenna controller operatively coupled to the RF switch to receive status information of the status of the first wireless protocol subsystem to determine assignment of the shared antenna, and to switch the RF switch to operatively couple the shared antenna to the first wireless protocol subsystem when it is determined to be active.

A spatially diverse antenna array may be used to reduce or eliminate multipath errors in ranging measurements for a mobile device. The spatial diversity in the antenna structure enables different locations of the antenna to experience different signal characteristics from which multipath signals may be identified. The measured relative reception time for each antenna in the array may be determined. The expected relative reception time for each antenna in the antenna array is determined based on an estimated location and orientation of the antenna array. The expected and measured relative reception times are fit to align the expected and measured relative reception times for one antenna such that for all other antennas the measured relative reception time is aligned or greater than the expected relative reception times. The range between the mobile device and the transmitter may be based on the fit of the expected and measured relative reception times.

According to an example embodiment, a method may include receiving, by a user equipment from a serving base station, a location update request; selecting, by the user equipment, a plurality of base station transmit beams including a beam for the serving base station and a beam for each of one or more non-serving base stations; determining, by the user equipment, a beam direction of each beam of the plurality of base station transmit beams; determining angle information including an angle between beam directions of one or more pairs of beams of the plurality of base station transmit beams; and, sending, by the user equipment to the serving base station in response to the location update request, the angle information, and a beam identifier identifying the selected beam for each of the one or more non-serving base stations.

Example methods and apparatus for configuring a transmit port of a downlink reference signal are described. One example method includes indicating configurations corresponding to a plurality of transmit ports to a terminal device by a network device by using first indication information. Each transmit port may be associated with one piece of delay information, transmit ports associated with same delay information correspond to a same configuration, and at least two transmit ports associated with different delay information correspond to different configurations. The terminal device may receive, based on a configuration corresponding to each transmit port, downlink reference signals sent by the plurality of transmit ports.

Disclosed is a sounding reference signal transmission method which is efficient in an uplink wireless telecommunications system using a multiple antenna technique and sounding reference signal hopping. A terminal is equipped with a plurality of antennas, and a base station receives the sounding reference signal transmitted from these antennas and estimates the uplink channel state of each antenna. The sounding reference signal performs frequency hopping so that the base station determines the channel condition for the entire bandwidth to which data is transmitted in the uplink system. In this environment, the sounding reference signal is transmitted through an antenna pattern through the entire data transmission bandwidth of the uplink system for each antenna of the terminal without additional overhead.

The invention is directed to systems, methods and computer program products for determining an operational mode for a device in a network. An exemplary method comprises determining a device has a first antenna and a second antenna; determining a first number of multipath components and associated power levels for the first antenna; determining a second number of multipath components and associated power levels for the second antenna; and determining an operational mode for the device based on the first number of multipath components and its associated power levels for the first antenna and the second number of multipath components and its associated power levels for the second antenna.

Disclosed herein are devices, systems and methods between a between a plurality of collaborating Access Points (APs) and a receiving station (STA) operating in a wireless local area network (WLAN). The method include the steps of: transmitting, by each AP in the plurality of collaborating APs, a data frame to the receiving STA, each data frame has a preamble portion, the preamble portion including a signal (SIG) field, and the SIG field has a subfield including information representative of a total number of spatial streams transmitted by the plurality of collaborating APs.