Nokia Siemens Networks Oy

Symbol Technologies, LLC

Joon Hwa Chun

Zexian Li

Shaohua Li

Shashikant Maheshwari

Michael J Koch

Shu-Shaw Wang

Xin Qi

Jian Feng Kang

Andrei Malkov

Guy P Roberts

Shu Shaw Wang

A method of radio frequency identification (RFID) tag bearing estimation comprises: at an RFID tag reader having a plurality of antenna elements, emitting a primary transmit beam; receiving a response signal from an RFID tag via the antenna elements; generating a first set of signal measurements corresponding to a first set of receive beam characteristics, based on a first partition of the response signal; generating a second set of signal measurements corresponding to a second set of receive beam characteristics, based on a second partition of the response signal; and combining the first and second sets of signal measurements, for selection of an estimated tag bearing for the RFID tag from the first and second receive beam characteristics.

Method and apparatus for radio frequency identification (RFID) tag bearing estimation

According to an example embodiment, a method may include allocating, within a single physical resource unit (PRU), a plurality of channel sounding groups. Wherein each channel sounding group includes a frequency-time domain code division multiplexing (CDM) allocation. The method may also include broadcasting, in a downlink direction to one or more mobile stations in a wireless network, a signal that causes the receiving mobile stations to transmit a channel sounding signal. The method may further include receiving at least one channel sounding signal from at least one of the one or more mobile stations, the channel sounding signal being received in an uplink direction via one or more channel sounding groups. And, the method may include estimating the channel quality, of the channel used by the physical resource unit, based upon the received at least one channel sounding signal.

Sounding channel apparatus and method

Various example embodiments are disclosed herein. According to an example embodiment, an apparatus may include a processor which may be configured to: permute subcarriers of a regular band, including subcarriers assigned to mobile station(s) operating in a single carrier mode and subcarriers assigned to mobile station(s) operating in a multiple carrier mode, to generate a first permuted regular band of subcarriers; and permute subcarriers of the first permuted regular band that are assigned to mobile station(s) operating in multiple carrier mode with subcarriers of an adjacent guard band.

Guard band utilization in multi-carrier mode for wireless networks

Growing community of inventors

Rockville, MD, United States of America

Joon Hwa Chun