Patent ID: 9226183
Filing Date: 2015-12-29
Classification: H04B,H04J,H04W

Abstract:
1. A method for use in a receiving node of a communications system applying frequency division multiplexing, for estimating at least one of a signal power and a noise power of a received reference signal, the method comprising: receiving a combined reference signal for each of multiple sub-carriers, wherein each combined reference signal includes a combination of a first reference signal from a first wireless terminal and a second reference signal from a second wireless terminal, determining at least three sub-carriers on which the combined reference signal is received, multiplying the combined reference signal with a conjugate based on the second reference signal for each determined sub-carrier to obtain first resulting signals, adding the first resulting signals sequentially pairwise to form second resulting signals, adding the second resulting signals sequentially pairwise to form a third resulting signal, estimating at least one of a signal power and a noise power of at least one of the first reference signal and the second reference signal based on the third resulting signal, at least one of the second resulting signals and the combined reference signal, and selecting a receiving point of an uplink multi-sector cell or a wireless terminal for multi-user, multiple-input and multiple output (MU-MIMO) based on at least one of the signal power and the noise power estimates that provide increased robustness from multiple-interfering signal sources.