REFERENCE SIGNAL MEASUREMENT

摘要

The embodiments disclosed relates to a method and a network node that estimates a signal power and/or noise power of a received reference signal. The receiving node may operate in a communications system applying frequency division multiplexing. An assumption is that the channel frequency responses, on adjacent subcarriers of the communications system are equivalent or constant. The method comprising receiving a reference signal comprising a first reference signal from a first wireless terminal and a second reference signal from a second wireless terminal By using this assumption it is possible to combine first and second reference signal in order to estimating the signal power and/or noise power of a received reference signal without a conventional channel estimation technique.

主权项

1. A method for use in a receiving node of a communications system applying frequency division multiplexing, for estimating a signal power and/or noise power of a received reference signal, the method comprising:
receiving a reference signal comprising 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 first and second reference signal is received, for each sub-carrier of the determined sub-carriers, multiplying the reference signal with a conjugate based on the second reference signal to form a first resulting signal, adding the first resulting signals sequentially pairwise to form at least two second resulting signals, adding the second resulting signals sequentially pairwise to form at least a third resulting signal, and estimating the signal power and/or noise power of the first or second reference signal based on the third resulting signal, the second resulting signal and the received reference signal.