Abstract: The present application suggests a receiver and a method of operating thereof for determining a noise estimate based on a radio frequency signal from an interference source over different propagation paths through a plurality of antennas. A covariance matrix estimator coupled through separate processing paths to a respective one of the plurality of antennas is arranged to determine an estimate of a covariance matrix based on the received radio frequency signal. A noise estimator coupled to the covariance matrix estimator for receiving the estimate of the covariance matrix is arranged to determine a noise estimate by solving a polynomial equation of second order as a function of the noise estimate on the basis the elements of the covariance matrix estimate relating to a set of two antennas.

Abstract: The present application suggests a receiver and a method of operating thereof for determining a noise estimate based on a radio frequency signal from an interference source over different propagation paths through a plurality of antennas. A covariance matrix estimator coupled through separate processing paths to a respective one of the plurality of antennas is arranged to determine an estimate of a covariance matrix based on the received radio frequency signal. A noise estimator coupled to the covariance matrix estimator for receiving the estimate of the covariance matrix is arranged to determine a noise estimate by solving a polynomial equation of second order as a function of the noise estimate on the basis the elements of the covariance matrix estimate relating to a set of two antennas.

Abstract: A network node of a wireless communication network comprises a receiver receiving an input signal from a remote transmitter of the wireless communication system via a transmission channel. A signal to noise ratio calculator is arranged to calculate a signal to noise ratio of the received input signal. A soft bit normalizer is arranged to determine a plurality of normalized soft bits using the input signal. A primary detector is arranged to detect a discontinuous transmission on the transmission channel using the plurality of the normalized soft bits and the signal to noise ratio, and if a discontinuous transmission on the transmission channel is detected, generate a DTX-decision or else trigger a refinement detector. The refinement detector is arranged to decode the normalized soft bits and to generate a further decision about whether the signal indicates a discontinuous transmission on the transmission channel using the decoded normalized soft bits.

Abstract: There is provided a method of estimating a bit error rate in a transport channel of a wireless communication system. The method comprises the receiving a signal from a remote transmitter of the wireless communication system via a physical channel, the signal comprising data and noise forming a plurality of soft bits. The method further comprises the counting, during a period of time, a number of erroneous bits being those soft bits which have an amplitude below ?2A or above +2A with A being the average amplitude of the soft bits received. Next, the number of erroneous bits is divided by a number of total bits received during said period of time in order to obtain the bit error rate. This method provides a way to estimate the BER value without knowing the exact shape of the noise distribution. In an embodiment a selection is made between two estimation algorithms.

Abstract: There is provided a network node of a wireless communication network, such as a UMTS network. The network node is arranged to perform a method of detecting Signal Discontinuous Transmission on a channel in the wireless communication network. The method comprises the receiving of a signal on the channel and the processing of a current slot of the signal, the current slot comprising a number of pilot bits and non-pilot bits. A bit error rate, a signal to noise ratio and an amplitude modulus is calculated using the pilot bits and non-pilot bits. A decision is made about whether the signal indicates a discontinuous transmission on the channel using the signal to noise ratio, the bit error rate and the amplitude modulus.

Abstract: A network node of a wireless communication network comprises a receiver receiving an input signal from a remote transmitter of the wireless communication system via a transmission channel. A signal to noise ratio calculator is arranged to calculate a signal to noise ratio of the received input signal. A soft bit normalizer is arranged to determine a plurality of normalized soft bits using the input signal. A primary detector is arranged to detect a discontinuous transmission on the transmission channel using the plurality of the normalized soft bits and the signal to noise ratio, and if a discontinuous transmission on the transmission channel is detected, generate a DTX-decision or else trigger a refinement detector. The refinement detector is arranged to decode the normalized soft bits and to generate a further decision about whether the signal indicates a discontinuous transmission on the transmission channel using the decoded normalized soft bits.