Abstract: A receiver receives at least one radio frequency band. A signal processor separates a signal space associated with the at least one signal in the at least one radio frequency band and a background space associated with interference and noise in the at least one radio frequency band. For a simulation, a memory stores the environment data of the at least one radio system based on the background space under control of the signal processor.

Abstract: A method and arrangement for generating data for transmitter or receiver simulations where the generated data includes Multiple Input Multiple Output radio environment (MIMO) characteristics. The arrangement includes a model data (11), which is off-line loadable to transmitter baseband unit (12). The model data is transmitted over a MIMO environment (14, 24), which scrambles the transmitted data. A receiver baseband unit (16) receives and saves the data. From the receiver baseband unit (16) the received data is loadable off-line to an external device where the data can be utilized in transmitter or receiver algorithm simulations.

Abstract: A radio channel is formed for estimation, the radio channel including dominant paths from a digital impulse response estimate of a channel relating to a radio system. A divider divides the impulse response estimate temporally into at least two subsignals. An analyser determines whether a distribution of the amplitude values of at least one subsignal is gaussian or non-gaussian. A searcher searches for a highest amplitude value in each subsignal, which is determined to be non-gaussian. A generator may form a radio channel for a radio channel simulation, the radio channel including each propagation path corresponding to the highest amplitude value in each subsignal determined to be non-gaussian.

Abstract: The invention relates to a device and a method for simulating a radio channel, wherein a signal transmitted and received by more than one antenna is simulated. The method comprises supplying an input signal of each antenna to a similar delay line, each delay line comprising a delay element connected in series for each propagation path, weighting an output signal of the delay elements corresponding with each propagation path by a term in dependence of a control vector of each transmitting antenna, by a term describing the distortion of a propagation path, and by a term in dependence of a control vector of each receiving antenna, and adding up the components corresponding with each receiving antenna and obtained from the outputs of the weighting means.

Abstract: The invention provides a device for simulating a multi-antenna radio channel, a module and a method. The device comprises channel modules for incorporating propagation effects into channel signals which represent radio signals propagating along propagation paths, which channel modules are electrically connected to neighbour channel modules for forming an (m,n) array configuration. The (m,n)th channel module is configured to receive a first (m,n?1)th channel signal and a second (m?1,n)th channel signal and comprises: a processing resource for processing the first (m,n?1)th channel signal according to a channel model, thus generating a processed (m,n)th channel signal, and a combiner for combining the processed (m,n)th signal and the second (m?1,n)th channel signal, thus generating a second (m,n)th channel signal. The (m,n)th channel module is further configured to output the second (m,n)th channel signal.

Abstract: The invention relates to a method, a testing arrangement, a testing device, an 8B/10B encoder and an 8B/10B decoder, with which the recovery from a 8B/10B encoding error of a device using serial data transmission may be tested. The 8B/10B encoder (302) according to the invention in a transmitting device (30) may create code words unspecified in the ANSI INCITS 203-1994 standard for testing. The 8B/10B decoder (312) in a receiving device (31) is able to indicate having converted a code word unspecified in the ANSI INCITS 203-1994 standard and having entered a testing mode. The testing device (33) connected to the receiving device commences monitoring of the receiving device (31), when the 8B/10B decoder (312) pertaining to it indicates the system having entered the testing mode.