Nec Corporation

Xinhua Wang

Dobrica Vasic

Paul Isaac

Thanh Ngoc Bui

David Stanhope

Nikolay Vaptzarov

Shikand Satheesh

A method of determining a signal quality parameter in a radio communications device includes: measuring a signal error parameter of a received signal (); comparing said measured signal error parameter to a threshold level (), and determining the signal quality parameter on the basis of a reference signal error parameter value () in the event that the measured signal error parameter value is less than the threshold level ().

Measuring received signal quality

A method of conducting soft combining of at least two received MBMS signals in a user equipment () of a radio telecommunications network (), the method including: demodulating () at least a subset of the received MBMS signals; converting (---) a floating point slot data vector to a fixed point slot data vector for each demodulated received MBMS signal; and soft combining () the fixed-point slot data vectors derived from at least two of said received MBMS signals.

MBMS soft combining

A method of demodulating a signal on which is modulated, using a quadrature amplitude modulation scheme, a plurality of information symbols, the method including: determining at least one QAM detection threshold corresponding to one or more of said information symbols; and demodulating each information symbol on the basis of at least one respective QAM detection threshold.

QAM demodulation

A method of enabling a communications receiver to verify an antenna weight previously signalled by the communications receiver to a base station, the method including the steps of; equalizing () a channel estimate of a dedicated pilot channel by the complex conjugate of a channel estimate of a common pilot channel to form an estimate of the transmission weight used by the base station; and for each transmission slot, combining () a component of the transmission weight estimates for current and previous slots to form an optimised transmission weight estimate.

Growing community of inventors

Glen Waverley, Australia

Xinhua Wang