Abstract:
The invention provides a device for simulating a multi-antenna radio channel, a module and a method. The device comprises channel modules (4A to 4I) for incorporating propagation effects into channel signals which represent radio signals propagating along propagation paths, which channel modules (4A to 4I) are electrically connected to neighbour channel modules (4A to 4I) for forming an (m,n) array configuration. The (m,n) th channel module (500) is configured to receive a first (m,n-1) th channel signal (508) and a second (m-1,n) th channel signal (506) and comprises: a processing resource (502) for processing the first (m,n-1) th channel signal (508) according to a channel model, thus generating a processed (m,n) th channel signal (514), and a combiner (504) for combining the processed (m,n) th signal (514) and the second (m-1,n) th channel signal (506), thus generating a second (m,n) th channel signal (512). The (m,n) th channel module (500) is further configured to output the second (m,n) th channel signal (512).
Abstract:
The invention relates to a system and associated software for operating a mobile device. The system comprises an external control system and a mobile device being controlled by the external control system. The external control system provides the mobile device with functional modules which comprise software and which are installed and executed remotely from the external control system without any user action at the mobile device end.
Abstract:
The invention relates to 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 comprises 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:
In a method and an arrangement for opening and closing a test chamber door, the door (204) is moved using an opening and closing mechanism (206) in the direction (210) of a normal defining the surface of the door opening (200) in front of the door opening (200) so that the door (204) is closed by pressing the door (204) against the frame (202) or opened by lifting off the door (204) from the frame (202). An open door (204) is transferred using a transfer mechanism (208) in a perpendicular direction (212) in relation to the direction (210) of the normal defining the surface of the door opening (200) close to the door opening (200) for closing. The open door (204) is transferred using the transfer mechanism (208) in the perpendicular direction (212) in relation to the direction (210) of the normal defining the surface of the door opening (200) away from the door opening (200) for transferring electronic devices to or from the test chamber.
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.
Abstract:
A method of characterizing an electric circuit of an electric device, a system, an electric device and a test device are provided. The system includes: a signal generator for generating a test signal having a radio frequency band spanning at least a portion of a frequency response range of the electric circuit; a load modulator for modulating the load with the test signal, thus generating a response signal in the electric circuit; and a correlator for generating cross-correlation between the response signal and the test signal.
Abstract:
The invention relates to a testing arrangement and a testing method for testing an electronic device. A fixture (200) comprises at least two fixture parts (2000, 2002), whereof at least one is arranged to be used for testing electronic devices (206) belonging to a product family and whereof at least one other is arranged to be used for product-specific testing of the electronic device (206) of said product family.
Abstract:
The test system includes an electronic device comprising a camera (202) for forming an image (310) on a detector (208). A holographic element (300) of the test system and the camera (202) under test of the electronic device are arranged during testing to be placed at a predetermined distance (320) from one another where the holographic element (300) is unfocused in the image field of the camera under test, and the holographic element (300) comprises a holographic test image (302) that is arranged to form a focused i mage on the detector of the camera operating as desired.
Abstract:
A system, an apparatus, a method, and a computer program for producing signals for testing radio frequency communication devices are provided. The system comprises a non-real-time domain which includes a data generator (102) for supplying a temporally discontinuous data stream (108) which data stream includes signal waveform data (110) and control data (112) defining characteristics of a conversion from the signal waveform data into a radio frequency test signal. The temporally discontinuous data stream is fed into a transformer (104) which transforms the temporally discontinuous data stream into a temporally continuous data stream (114), thus providing a transformation between the non-real-time domain and a real-time domain. The real-time domain includes a radio frequency unit (106) which uses the temporally continuous signal data stream as input, and performs the conversion from the signal waveform data (532) into the radio frequency test signal (534) according to the control data.
Abstract:
The invention relates to a method and a simulator for simulating a radio channel between a transmitter (100) and a receiver (102). The simulating device comprises means (308) for digitally simulating a radio channel between the transmitter and the receiver. The device also comprises means (304, 316) for digitally simulating interferences and distortions caused by analog parts of the transmitter and the receiver between transmitters and receivers.